Taxiing

Objective

The student will develop and demonstrate ATP-level proficiency in all methods of helicopter taxi operations, including hovering taxi, air taxi, and (when applicable) ground taxi on wheels or water taxi operations, while maintaining precise altitude control, track accuracy, and heightened awareness of surface hazards, other traffic, rotorwash effects, and loss of tail rotor effectiveness (LTE) conditions. Upon completion, the student will consistently perform taxi operations to ATP standards as specified in FAA-S-ACS-ATP AT.III.C, maintaining hover height within ±½ foot when within 10 feet of the surface, ±5 feet when above 10 feet, hovering taxi track within 2 feet of desired track, air taxi altitude within 10 feet of desired altitude, while demonstrating professional judgment in spacing, surface markings compliance, and ATC communications appropriate for turbine helicopter operations in controlled airspace.

Content

Professional Taxi Operations Foundation

ATP helicopter operations demand precision taxi techniques that exceed commercial standards. The professional pilot demonstrates consistent control inputs, predictive airspace awareness, and proactive risk management during all ground movements. Unlike commercial operations where slight deviations are acceptable, ATP operations require anticipation of surface conditions, wind effects, and traffic conflicts before they develop.

Regulatory Framework

14 CFR §91.113 mandates right-of-way rules—aircraft on the surface yield to aircraft landing or in final approach. 14 CFR §91.129 requires ATC clearance before crossing any runway at towered airports. 14 CFR §91.209 addresses lighting requirements for night taxi operations. At ATP level, you’re expected to know these regulations cold and apply them without hesitation.

14 CFR §135.100 (for commercial operators) requires flight crewmembers to keep safety belts fastened during taxi, takeoff, and landing—professional habit for all operations. AC 91-73 provides guidance on single-pilot operations and specifically addresses workload management during taxi, particularly critical when managing turbine systems, avionics programming, and ATC communications simultaneously.

Taxi Method Selection and Execution

Three primary taxi methods exist for helicopters:

Hover Taxi: Movement at airspeeds normally below 20 knots conducted at hovering altitudes from the surface to approximately 10 feet AGL. Think of this as precision maneuvering—you’re the surgeon with a scalpel, not a carpenter with a hammer. Used when ground obstructions exist, when operating near other aircraft or personnel, in confined areas, or when surface conditions make wheel contact undesirable. Standard hover taxi altitude is typically 3-5 feet skid height for skid-equipped helicopters, adjusted for surface conditions and obstacles. ATP standards require track accuracy within 2 feet—you’re painting a line on the ramp with your skids.

Air Taxi: Movement at airspeeds up to 100 knots and altitudes up to 100 feet AGL. This is your cross-country taxi method when repositioning on large airports or operating from offshore platforms. Allows faster repositioning while maintaining clearance from surface traffic and obstacles. In turbine helicopters, monitor torque and gas producer (Ng) continuously—some models have operating limitations on ground effect hover out of ground effect airspeeds. ATP standard is ±10 feet of desired altitude—far tighter than just “maintaining altitude” expected at commercial level.

Ground Taxi (Wheeled Helicopters): Surface movement using aerodynamic controls to maintain heading while wheels remain in contact with the surface. The collective provides weight on wheels—light enough to maintain directional control through cyclic and antitorque, heavy enough to prevent dynamic rollover. Used when appropriate on smooth, level surfaces with sufficient weight-on-wheels for positive directional control. You maintain enough RPM for positive control authority (typically normal operating RPM) while keeping the helicopter light on the wheels. Too much collective and you’ll hover unintentionally; too little and you lose heading control authority. This is a touch game, not a force game.

Control Inputs and Precision Technique

At ATP level, every control input is deliberate and smooth. Hovering taxi requires coordinated use of all controls—cyclic for direction and ground track, collective for altitude, pedals for heading alignment. The professional pilot’s scan includes: ground track reference, heading indicator cross-check, altimeter when above 10 feet AGL, torque monitoring, and outside traffic/obstacle awareness.

Anticipate wind gusts by 2-3 seconds. If you wait until you drift to correct, you’re already behind the helicopter. In turbine helicopters with high inertia rotor systems (like Bell 206 or AS350), collective inputs produce more pronounced pitch changes than piston helicopters—smooth, measured inputs prevent altitude bobbles.

Air taxi requires transitioning through translational lift—anticipate the nose-down pitch change and reduced power requirement. Common error: Students climb 20 feet during air taxi because they don’t reduce collective through effective translational lift. Set your altitude, then protect it with scan and micro-adjustments. In turbine helicopters, scan includes Ng, torque, and TOT continuously—an engine anomaly during air taxi requires immediate recognition and response.

Surface Movement Planning and Situational Awareness

Before moving, verbalize your taxi route. “Cleared to Runway 34 via Alpha, cross Runway 16, hold short Runway 34 at Bravo.” Then visualize it on the airport diagram. Professional pilots read back hold-short instructions verbatim and include their call sign—this is not optional at ATP level.

Identify all surface markings along your route: hold lines (solid and dashed), ILS critical areas (ladder markings), runway edge lines, taxiway centerlines. Yellow lines are your bible—if you’re not sure, stop and ask. Crossing a runway without clearance is a certificate-action event. Period.

Calculate spacing from other aircraft and structures based on rotor diameter plus safety margin. For a Bell 407 (35-foot rotor diameter), maintain minimum 50-foot clearance from obstacles, other aircraft, and personnel when hovering. Double this distance when surface winds exceed 15 knots—your tail rotor effectiveness could be compromised, requiring increased antitorque pedal that creates asymmetric rotorwash patterns.

At night, taxi operations require additional vigilance. Depth perception degrades significantly—use landing light to judge hover altitude and use known references (painted lines, ramp edges) to maintain track. Reduce hover taxi speed by 30-40% at night. If your landing light fails during taxi, stop immediately, notify ATC, and assess whether safe taxi is possible using other visual references.

Loss of Tail Rotor Effectiveness (LTE) Avoidance

LTE is the professional helicopter pilot’s constant consideration during taxi operations. Four regions create LTE risk:

1. Weathercock stability (210-330° relative wind): Right quartering tailwinds cause the helicopter to weathervane, requiring increased left pedal. High pedal application reduces available antitorque authority for heading control.

2. Tail rotor vortex ring state (140-240° relative wind): Left quartering tailwinds create a vortex ring around the tail rotor, reducing thrust effectiveness. Onset is insidious—you need more and more pedal until you’re at the stop.

3. Main rotor disc interference (285-315° relative wind): Direct right quartering tailwind disrupts tail rotor airflow with main rotor wash.

4. Main rotor disc vortex interference (010-030° relative wind): Left front quartering wind redirects main rotor vortex into tail rotor.

During taxi, avoid slow speed operations in these wind quadrants. If winds are from the left quartering aft position (critical LTE zone), plan your taxi route to minimize time in hover with that wind condition. Air taxi at 40+ knots through those areas when possible, or reposition to face into wind before slowing. If you feel increasing left pedal application without corresponding control input, immediately increase airspeed, reduce collective, or turn into the wind. Never “test” LTE conditions at ATP level—you avoid them altogether through preflight planning.

Rotorwash and Foreign Object Damage (FOD) Management

Your rotor system moves massive air volume—treat it as a weapon that can injure personnel and damage aircraft. In a Bell 407 at hover power, downwash exceeds 60 mph directly under the rotor system. Within one rotor diameter laterally (35 feet), winds still exceed 30 mph capable of moving unsecured objects, raising dust, and destabilizing personnel.

Before taxi, scan for loose objects: tie-down ropes, chocks, paper, debris, gravel. Loose items become projectiles in your rotorwash—these can damage your helicopter or others nearby. When taxiing near other aircraft, maintain minimum one rotor diameter spacing when possible, double when winds are strong or when operating on loose surfaces.

Gravel, dirt, or debris surfaces require special consideration. Evaluate surface before committing to hover taxi—if dust rises immediately upon collective application, consider air taxi at 25-50 feet to minimize brownout and FOD ingestion. In turbine helicopters, FOD strikes can cause catastrophic compressor damage requiring engine replacement. Your insurance company won’t care that the gravel “didn’t look loose.”

When taxiing near personnel, maintain 100-foot clearance minimum when hovering. If closer spacing is unavoidable (ramp personnel marshaling, refueling operations), reduce collective to minimum hover power and minimize time in proximity. Brief passengers that rotorwash will be significant and ensure all doors are secure before taxi.

Surface Markings and ATC Compliance

ATP operations occur at busy airports where surface incidents have catastrophic potential. Runway incursions result from three failures: poor communication, poor situational awareness, or poor discipline. You eliminate all three.

Hold Lines: Double solid yellow lines with dashed yellow lines indicate runway hold position. Stop with skids/wheels entirely behind the hold line—not on it, behind it. If you can see yellow under your skid, you’re too far forward. At night or in reduced visibility, hold lines are marked with in-pavement lights or signage.

ILS Critical Areas: Taxiway locations where ground traffic causes ILS signal interference. Marked with ladder-style yellow markings and signs stating “ILS HOLD” or “CAT I/II/III HOLD.” When tower states “hold short ILS critical area,” treat this identically to a runway hold instruction—stop and do not proceed without explicit clearance. During low visibility operations (typically below 800 RVR), these areas are actively protected.

Taxiway Centerlines and Edge Lines: Single yellow centerline marks taxiway center; double yellow lines mark edges. Professional habit is tracking centerlines within 2 feet—this becomes critical when taxiways narrow or when taxiing large helicopters on complex ramp areas.

Surface Movement Radar (if equipped): At large airports, ATC uses ASDE-X surface radar and can see your position in real-time. If tower says “Helicopter 123, verify you’re holding short Runway 34,” they see something inconsistent with your readback—stop immediately and clarify before proceeding.

ATC Communications During Taxi: Read back all hold-short instructions verbatim with your call sign. “Helicopter 407DH, hold short Runway 34 at Alpha.” If instructions are unclear or you’re unsure of your position, say “Helicopter 407DH is unfamiliar, request progressive taxi instructions.” Tower will guide you step-by-step—there is zero shame in asking. Deviation from clearance without asking destroys professional credibility and creates safety hazards.

Checklist Discipline and Cockpit Management

Turbine helicopters typically require “Before Taxi” and “Taxi” checklist completion. Before Taxi includes verifying flight controls freedom of movement, flight instruments crosschecked, radios set, transponder on, and lights as required. Taxi checklist includes verifying engine instruments stable, caution/warning panels clear, and taxi route briefed.

At ATP level, checklists are flows-backed-by-checklist. You perform control checks by flow (cyclic full forward/aft/left/right, pedals full left/right, collective full down/up) then verify completion with checklist callout. Never skip checklist items because you’re “just taxiing to the fuel pad.” This is how professional pilots bend helicopters—complacency during routine operations.

Single-pilot resource management during taxi is critical. If ATC issues complex instructions while you’re hovering taxi through a congested ramp, stop in a safe location before copying instructions. Write down taxi clearances if complex. Set radios and avionics while at a complete stop, not while moving. Task saturation causes surface deviations—manage workload by stopping when necessary.

Water Operations (Float-Equipped Helicopters)

Water taxi involves displacement taxiing (on-step taxiing) where the helicopter remains in contact with water while moving via collective and cyclic inputs, similar to ground taxi in wheeled helicopters. Maintain enough RPM for control authority while avoiding excessive collective that creates hover. Directional control comes from cyclic tilt and antitorque pedals.

Approaching a buoy requires precision hovering over water while a crew member secures the mooring line. Challenges include absence of fixed visual references for hover, water surface wind effects creating rapid drift, and ensuring float spacing from buoy to prevent contact. Brief crew on buoy approach procedures, establish hand signals, approach into wind when possible, and maintain 3-5 foot hover while mooring line is secured.

Docking requires coordinated crew procedures, wind assessment, and precise control near structures. Assign one crew member as “spotter” to monitor clearances, approach at minimum taxi speed, and use collective gently to avoid bouncing floats off dock structures. Secure helicopter with mooring lines before reducing RPM.

Special Considerations for Turbine Helicopters

Many ATP candidates fly turbine helicopters with systems requiring monitoring during taxi:

• Temperature Monitoring: Turbine outlet temperature (TOT) or exhaust gas temperature (EGT) can exceed limits during extended ground operations in hot weather. If TOT approaches maximum (typically 810°C for Allison 250 series engines), minimize ground time or increase altitude to improve cooling airflow.

• Fuel Control Limits: Some turbines have power limitations in ground effect (some Bell 206 models, for example, have reduced MGT limits in ground effect). Know your POH limitations.

• Hydraulics: Most turbine helicopters have hydraulic flight control boost. If hydraulics fail during taxi, control forces increase dramatically—land immediately and do not attempt to continue flight.

• Electrical Load Management: Turbine helicopters often have high electrical loads (multi-channel radios, glass cockpits, air conditioning). Monitor electrical system during taxi and shed non-essential loads if alternator/generator output is marginal.

Schedule

Equipment

Required References:

• FAA-S-ACS-ATP (ATP Helicopter Airman Certification Standards) — AT.III.C
• FAA-H-8083-21B (Rotorcraft Flying Handbook), Chapter 7: Helicopter Taxiing
• Helicopter Flight Manual / Pilot’s Operating Handbook (specific to training aircraft)
• 14 CFR Part 91, Subparts A and B (General Operating and Flight Rules)
• FAA-H-8083-25 (Pilot’s Handbook of Aeronautical Knowledge), Chapter 14: Airport Operations
• AC 91-73B (Single Pilot Operations)
• Airport Diagram for training airport (current FAA chart)
• Airport/Facility Directory (Chart Supplement) entry for training airport

Materials and Visual Aids:

• Airport surface diagram (laminated, suitable for cockpit use)
• Surface marking photographs or diagrams showing hold lines, ILS critical areas, taxiway markings
• LTE wind quadrant diagram (visual reference showing 4 critical regions)
• Whiteboard or diagram showing hover taxi technique, air taxi profile, and ground taxi technique
• Taxi clearance notepad or kneeboard for copying ATC instructions
• Checklist (Before Taxi, Taxi, Hover Check) for training aircraft

Training Helicopter:

• ATP training helicopter (turbine preferred: Bell 206, Bell 407, AS350, or similar) with current airworthiness
• Functional flight controls, hydraulics (if equipped), and instruments
• Intercom system for instructor-student communication
• Training area with controlled airport access or Class D/C airspace for ATC interaction practice
• Suitable surface area for practicing hover taxi, air taxi, and (if wheeled) ground taxi operations

Instructor Actions

1. Preflight Briefing: Conduct comprehensive ground briefing covering all three taxi methods (hovering taxi, air taxi, ground taxi), explaining ATP performance standards: hover altitude ±½ foot within 10 feet AGL, ±5 feet above 10 feet; hovering taxi track within 2 feet; air taxi altitude within 10 feet. Review regulatory requirements under 14 CFR §91.113 (right-of-way rules) and §91.129 (tower-controlled airport operations). Explain checklist procedures for Before Taxi and Taxi items.

2. Surface Markings Review: Using current airport diagram, review taxi route from ramp to runway, identifying all hold lines, ILS critical areas, taxiway centerlines, and edge markings. Explain the critical distinction between single/double solid yellow hold lines and dashed yellow lines. Emphasize that crossing any runway hold line without ATC clearance is a certificate-action event. If possible, walk the ramp area and physically show student hold lines, centerlines, and reference points for track accuracy.

3. LTE Avoidance Discussion: Display LTE wind quadrant diagram showing four critical regions (weathercock stability 210-330°, tail rotor vortex ring state 140-240°, main rotor disc interference 285-315°, main rotor disc vortex interference 010-030°). Explain recognition cues: increasing left pedal application without control input, yaw contrary to pedal input, or rapid uncommanded right yaw. Teach avoidance: minimize hover time in critical wind quadrants, air taxi through those areas when possible, turn into wind when slow speed is necessary. Emphasize that ATP pilots never “test” LTE conditions—you avoid them through planning.

4. Rotorwash and Spacing Briefing: Explain rotorwash hazards using specific aircraft performance data (e.g., “Bell 407 produces 60+ mph downwash at hover power within rotor disc”). Teach spacing standards: minimum one rotor diameter from other aircraft when hovering, double that distance in high winds or loose surface conditions. Establish minimum 100-foot clearance from personnel when hovering; 50-foot clearance from obstacles. Demonstrate FOD awareness: scan for loose objects before collective application, evaluate surface conditions for debris.

5. ATC Communication Procedures: Brief standard taxi clearance format: “Helicopter 407DH, taxi to Runway 34 via Alpha, hold short Runway 16 at Bravo.” Demonstrate correct readback: “Taxi to Runway 34 via Alpha, hold short Runway 16 at Bravo, Helicopter 407DH.” Explain progressive taxi request phraseology: “Helicopter 407DH is unfamiliar, request progressive taxi to Runway 34.” Emphasize writing down complex clearances and stopping in safe location if workload becomes excessive during taxi.

6. Demonstration Flight: Conduct complete demonstration including startup, Before Taxi checklist, initial liftoff to hover, hovering taxi along taxiway centerline demonstrating 2-foot track accuracy, proper spacing from parked aircraft and obstacles, smooth control inputs with narration (“slight right cyclic to correct for left drift, maintain heading with pedals, 4-foot skid height”), ATC communication with proper readback, and compliance with hold-short instruction. Demonstrate air taxi transition: “Smoothly lower nose, anticipate pitch change through translational lift, reduce collective slightly, establish 40 knots at 30 feet AGL, maintain altitude within 10 feet.” Return with air taxi demonstration, transition to hovering taxi, and precision spot landing.

7. Initial Student Practice Setup: Position student in pilot seat for hovering taxi practice. Brief specific practice area (e.g., “Taxi from this spot to the far taxiway intersection along centerline”). Establish performance standards before each maneuver: “Maintain 3-4 foot skid height, track centerline within 2 feet left or right, smooth control inputs.” Monitor initial liftoff for proper collective application, heading control with pedals, and cyclic positioning for level attitude.

8. Hovering Taxi Coaching: Provide immediate, specific feedback during student hovering taxi: “You’re drifting right—small left cyclic, hold it there… good.” “Watch your altitude—you’re at 6 feet, lower to 4 feet with smooth collective reduction.” “Track the centerline with your eyes down the taxiway, not directly in front of the skids.” Prompt proper scan: “Crosscheck your heading indicator—are you aligned with the taxiway?” Intervene immediately if student drifts toward obstacles or exceeds altitude limits: “I have the controls—you were approaching that tie-down chain.”

9. Air Taxi Coaching: Set up air taxi demonstration: “We’ll air taxi from this position to the far ramp at 40 knots and 30 feet.” Talk student through transition: “Smoothly apply forward cyclic, allow helicopter to accelerate, you’ll feel the nose want to drop through translational lift around 16-20 knots, reduce collective slightly to maintain altitude, check altimeter—we want 30 feet AGL.” Monitor altitude deviations and provide immediate correction cues: “You’re climbing through 40 feet—reduce collective, cross-check your altitude.” Coach wind correction: “Wind is from the left, notice your ground track drifting right—correct with slight left cyclic.”

10. ATC Communication Practice: Key microphone and issue realistic taxi clearances: “Helicopter 407DH, taxi to Runway 34 via Alpha, Bravo, hold short Runway 16 at Charlie.” Evaluate readback accuracy and completeness—correct any deviations: “Negative, hold short Runway 16, not Runway 34.” Issue hold-short instructions: “Helicopter 407DH, hold short Runway 34.” Verify student stops with skids completely behind hold line—if student positions on or over the line, provide immediate correction: “You’re on the hold line—taxi back 5 feet so your skids are completely behind the line.”

11. Scenario-Based Challenges: Introduce realistic scenarios to evaluate judgment: “Tower has just cleared us to cross Runway 16—talk me through how you’ll verify it’s clear and execute the crossing.” “Winds are now 280 at 18 knots—what’s your LTE concern and how do you adjust your taxi plan?” “You see a loose tarp on the ramp 50 feet ahead—what’s your action?” Evaluate student verbal responses and decision-making before allowing execution. Create traffic conflict: “Helicopter approaching from your left on crossing taxiway—what do you do?” Correct answer includes stopping, establishing visual contact, maintaining spacing, and continuing only when clear.

12. Performance Refinement: As student demonstrates basic competency, tighten tolerance requirements toward ATP standards. Provide specific measurement feedback: “That turn put you 4 feet left of centerline—ATP standard is within 2 feet.” “Your hover altitude varied between 2 and 6 feet—tighten that to 3.5-4.5 feet maximum.” Coach smoothness: “Your collective inputs are causing altitude bobbles—make smaller corrections and anticipate wind gusts 2-3 seconds early.”

13. Error Recognition and Correction: If student demonstrates common errors, stop and brief corrective technique. Examples: “You’re chasing altitude instead of anticipating—set your hover height, then protect it with micro-corrections.” “You’re over-controlling with cyclic—the helicopter wants to track straight, just guide it gently.” “You’re fixating on the centerline right in front of you—look 30-50 feet ahead and use peripheral vision for immediate position.” Demonstrate correct technique, then have student repeat with new focus.

14. Checkride Scenario Preparation: During final practice session, simulate checkride environment: “I’m the evaluator now—I will give you taxi clearances and evaluate your performance to ATP standards without coaching.” Issue clearance: “Helicopter 407DH is cleared to taxi to Runway 34 via Alpha, Bravo, hold short of Runway 16 at Charlie, advise ready for departure.” Evaluate readback, taxi execution, surface marking compliance, spacing, control precision, checklist completion, and ATC interaction. Provide critique after scenario: identify any ACS deviations and require re-demonstration to standard.

15. Debrief and Assessment: Conduct structured debrief using ACS task AT.III.C as framework. Review each performance element: hover altitude control (within ±½ foot inside 10 feet AGL?), track accuracy (within 2 feet?), air taxi altitude (within 10 feet?), spacing from aircraft and persons, surface marking compliance, ATC communication quality, checklist discipline, and overall professional conduct. Provide written feedback identifying specific strengths and areas requiring additional practice. Assign self-study: review aircraft limitations related to taxi operations, practice mentally visualizing taxi routes using airport diagrams, and review LTE avoidance strategies.

Student Actions

1. Preflight Preparation: Review FAA-S-ACS-ATP task AT.III.C performance standards, FAA-H-8083-21B Chapter 7 covering taxi procedures, aircraft POH/RFM taxi procedures and limitations, and current airport diagram for training airport including all surface markings and hotspots. Come to lesson prepared to explain three taxi methods (hovering taxi, air taxi, ground taxi), LTE avoidance strategies, and surface marking symbology.

2. Ground Briefing Participation: Actively engage in ground briefing by asking clarifying questions about ATP performance standards, LTE wind quadrants, or surface marking interpretation. Explain in own words the difference between hovering taxi and air taxi—when each is appropriate and what control inputs differ. Demonstrate understanding of spacing requirements by calculating minimum clearance distances for training aircraft based on rotor diameter.

3. Surface Area Familiarization: Walk airport surface area with instructor (if available), physically identifying hold lines, ILS critical areas, taxiway centerlines, and visual references that will be used for track guidance during flight. Photograph or sketch key reference points to aid memory during subsequent flight operations.

4. Preflight and Checklist Execution: Complete aircraft preflight inspection independently, then brief instructor on aircraft status and any discrepancies. During aircraft startup, perform Before Taxi checklist by flow, then verify completion with written checklist callout. Verbalize each checklist item and response: “Flight controls—free and correct movement in all axes.” Demonstrate control check: cyclic full forward/aft/left/right, pedals full left/right, collective full travel, verifying smooth operation and proper response.

5. Initial Hovering Taxi Practice: Smoothly apply collective to establish hover at 3-4 feet skid height, stabilize all control inputs, establish heading aligned with taxiway, then initiate hovering taxi with small forward cyclic input. Maintain taxiway centerline within 2 feet using visual references 30-50 feet ahead, cross-checking immediate position with peripheral vision. Maintain altitude within ±½ foot of target hover height by micro-adjustments to collective. Maintain heading with antitorque pedals. Demonstrate smooth, coordinated turns: establish bank with cyclic, coordinate with pedals to maintain desired heading change rate, level cyclic while stopping turn.

6. Altitude Control Refinement: Demonstrate ability to hold precise hover altitude by establishing target skid height (e.g., 4 feet), cross-checking vertical reference points (door height relative to ground objects, shadow position if applicable), and making collective adjustments in advance of wind gusts or turbulence. Verbalize scan pattern: “Track ahead, altitude reference, heading indicator, track ahead.” Self-correct altitude deviations immediately: if climbing through 5 feet, reduce collective before reaching 6 feet.

7. Air Taxi Execution: Upon instructor clearance to practice air taxi, verbalize procedure: “Transitioning to air taxi: lowering nose, accelerating to 40 knots, climbing to 30 feet AGL.” Smoothly apply forward cyclic, allow helicopter to accelerate, reduce collective through translational lift to maintain 30 feet AGL (±10 feet), establish 40-knot cruise, and maintain desired track over ground with cyclic wind correction. Cross-check altimeter continuously—if deviating more than 10 feet from target, immediately adjust collective and verbalize: “Correcting altitude, reducing collective, returning to 30 feet.”

8. Traffic and Obstacle Spacing: Continuously scan for other aircraft, ground vehicles, and personnel during all taxi operations. Verbalize spacing assessment: “Aircraft parking on my right—main rotor is 35 feet diameter—maintaining 50 feet clearance.” Proactively identify FOD hazards: “Loose debris ahead—stopping to evaluate surface conditions before continuing.” If personnel are visible near taxi route, verbalize plan: “Ground crew at 10 o’clock, 75 feet—maintaining current track provides safe clearance from rotorwash.”

9. ATC Communication: Copy taxi clearances on kneeboard or notepad, read back verbatim with call sign: “Taxi to Runway 34 via Alpha, hold short Runway 16 at Bravo, Helicopter 407DH.” If clearance is unclear or too complex to remember, request clarification: “Helicopter 407DH, verify hold short of Runway 16 or Runway 34?” Before crossing any hold line after receiving clearance, visually verify runway is clear in both directions and verbalize: “Runway 16 is clear left and right, crossing now.” When reaching hold-short point, stop completely with skids behind hold line and report: “Helicopter 407DH is holding short Runway 34 at Bravo.”

10. Surface Marking Compliance: Identify all surface markings along taxi route and verbalize compliance plan: “Approaching Runway 16 hold line—stopping with skids completely behind double solid yellow lines.” “ILS critical area ahead—ladder markings visible—holding short until tower clearance received.” Track taxiway centerlines within 2 feet by selecting visual aiming point down centerline and using small cyclic corrections to maintain track. If drifting off centerline, verbalize correction: “Drifting right of centerline—left cyclic correction, returning to centerline.”

11. LTE Avoidance: Before each taxi segment, assess wind direction and identify any LTE-critical quadrants. Verbalize assessment: “Winds 270 at 15 knots—right quartering tailwind is in weathercock stability zone 210-330 degrees. Will minimize hover time and air taxi through this area when possible.” If winds shift to LTE-critical quadrant during hover taxi, immediately verbalize plan: “Wind now left quartering tailwind—critical LTE zone. Turning into wind before continuing” or “Transitioning to air taxi to minimize LTE exposure.”

12. Checklist Discipline: Complete Taxi checklist after beginning taxi operations: “Taxi checklist: engine instruments—verified in normal range, caution/warning panel—clear, flight controls—checked, taxi route—briefed.” Maintain checklist discipline even during short taxi movements. If instructor or ATC interrupts during checklist, return to beginning of interrupted section after responding. Demonstrate single-pilot resource management: if ATC issues complex clearance during active taxi, stop in safe location, copy clearance, then continue taxi.

13. Scenario Response: Respond to instructor scenario challenges with verbalized decision-making process. Example: “Winds now 280 at 18 knots—this is right quartering tailwind in weathercock stability zone. I’ll air taxi through this area at 40 knots rather than hover taxi to reduce LTE exposure.” “Loose tarp visible ahead on ramp—potential FOD hazard. Stopping, evaluating alternate taxi route to avoid creating rotorwash that would blow debris into aircraft or flight path.”

14. Error Recognition and Self-Correction: Demonstrate awareness of performance deviations and self-correct before instructor intervention. Examples: “Drifting left of centerline—correcting right.” “Altitude increasing through 5 feet—reducing collective.” “Ground speed too fast for this congested ramp area—reducing to slower hover taxi speed.” If instructor identifies error student did not recognize, acknowledge, verbalize corrective action, and demonstrate immediate correction.

15. Performance Self-Assessment: During debrief, accurately self-assess performance against ATP standards: “My hover altitude control was within standards—mostly ±½ foot. My track accuracy needs improvement—I drifted 3-4 feet off centerline during turns. I need to work on anticipating cyclic corrections earlier.” Ask specific questions about areas of uncertainty: “When transitioning from air taxi to hovering taxi, I ballooned 15 feet—should I reduce collective earlier in the deceleration?” Review ACS standards AT.III.C and identify specific areas requiring additional practice before checkride.

Completion Standards

The student demonstrates ATP-level proficiency in all applicable helicopter taxi methods and consistently meets the performance standards specified in FAA-S-ACS-ATP task AT.III.C. The lesson is complete when the student:

Knowledge and Understanding:

• Explains safe and appropriate taxi procedures for hovering taxi, air taxi, and (when applicable) ground taxi or water taxi operations
• Describes proper spacing requirements based on rotor diameter, rotorwash effects, and surface conditions
• Identifies all four LTE wind quadrants and explains specific avoidance strategies during taxi operations
• Interprets surface markings including runway hold lines, ILS critical areas, taxiway centerlines, and edge markings

Risk Management:

• Maintains proper spacing from other aircraft, structures, and persons at all times, accounting for rotorwash and flying debris hazards—minimum one rotor diameter clearance, doubled in high winds or loose surface conditions
• Actively avoids conditions that may cause loss of tail rotor effectiveness by planning taxi routes to minimize hover time in critical wind quadrants (weathercock stability 210-330°, tail rotor vortex ring state 140-240°, main rotor disc interference 285-315°, main rotor disc vortex interference 010-030°)
• Maintains constant vigilance and positive helicopter control during all taxi operations through continuous scan of flight instruments, outside references, traffic, and obstacles
• Observes and complies with all runway hold lines, ILS critical areas, and surface control markings without exception

Skill and Proficiency:

Hovering Taxi (when within 10 feet of surface):

• Maintains hover altitude within ±½ foot of desired altitude (e.g., 3-4 foot skid height maintained between 3.5-4.5 feet)
• Maintains ground track within 2 feet of desired track (taxiway centerline, designated route, or as directed)
• Demonstrates smooth, coordinated control inputs without overcontrolling or altitude bobbles
• Maintains desired heading aligned with taxi route using coordinated pedal inputs

Air Taxi (above 10 feet AGL):

• Maintains altitude within 10 feet of desired altitude (e.g., 30 feet AGL maintained between 20-40 feet)
• Maintains appropriate airspeed for conditions (typically 20-100 knots) with smooth transitions through translational lift
• Maintains desired ground track with appropriate wind correction
• Cross-checks altimeter continuously and makes proactive altitude corrections

Ground Taxi (wheeled helicopters) or Water Taxi (float-equipped helicopters):

• Maintains appropriate weight on wheels/floats while retaining positive directional control through cyclic and antitorque inputs
• Tracks taxiway centerline accurately using coordinated control inputs
• Demonstrates proper technique for approaching buoys and docking (float operations)
• Manages power and RPM appropriately to maintain control authority without unintended liftoff

Surface Operations and Compliance:

• Accomplishes all applicable checklist items (Before Taxi, Taxi, Hover Check) completely and in proper sequence
• Performs recommended procedures from POH/RFM specific to taxi operations
• Maintains desired track and appropriate speed for surface conditions, congestion, and obstacles
• Complies with all ATC instructions or evaluator-simulated ATC without deviation
• Stops with landing gear completely behind all runway hold lines before receiving crossing clearance
• Observes ILS critical areas, localizer/glideslope critical areas, and does not enter without clearance
• Identifies and complies with all other surface markings including displaced thresholds, closed runways/taxiways, and airport signage
• Reads back all hold-short instructions verbatim including runway identifier and call sign

Professionalism and Situational Awareness:

• Maintains constant vigilance through systematic scan of instruments, outside references, and traffic throughout taxi operations
• Demonstrates positive helicopter control at all times with no uncommanded drift, altitude deviations exceeding standards, or loss of directional control
• Recognizes and verbalizes potential hazards including traffic conflicts, LTE wind conditions, FOD, and surface marking confusion
• Demonstrates single-pilot resource management by stopping in safe location when workload becomes excessive (complex ATC instructions, avionics programming, etc.)
• Projects professional demeanor through smooth control inputs, proper radio phraseology, and methodical checklist discipline

Performance meets ATP certification standards as specified in AT.III.C when all elements are accomplished consistently without instructor intervention or prompting, and all quantitative tolerances (hover altitude ±½ foot within 10 feet AGL, ±5 feet above 10 feet AGL; hover taxi track within 2 feet; air taxi altitude within 10 feet) are maintained throughout all taxi operations.