Taxiing with Wheel-Type Landing Gear

Objective

Upon completion of this lesson, the CFI candidate will demonstrate the ability to teach taxi operations with wheel-type landing gear to appropriate ACS standards. The candidate will explain and demonstrate proper taxi procedures, risk management techniques, and error recognition while maintaining teaching effectiveness. This lesson addresses ACS task HI.VIII.D and prepares the CFI candidate to instruct students in safe ground operations at controlled and uncontrolled airports.

Content

Introduction to Taxi Operations

Taxiing a helicopter with wheel-type landing gear is fundamentally different from fixed-wing aircraft operations. Unlike airplanes that rely primarily on rudder pedals and differential braking, helicopters require coordinated use of all flight controls even during ground operations. The helicopter’s dynamic nature means that improper control inputs during taxi can lead to dynamic rollover, loss of directional control, or rotor strikes.

Airport References and Information Resources (K1)

Effective taxi operations begin with thorough preparation using current aeronautical references:

Chart Supplement: Contains critical heliport and airport information including taxi restrictions, noise abatement procedures, and helicopter-specific operating procedures. Many airports have designated helicopter taxi routes that differ from fixed-wing operations.

Airport Diagrams: Essential for route planning and identifying potential hazards. Hot spots are clearly marked areas where runway incursions or ground conflicts frequently occur. As instructors, we must emphasize that students should always have the airport diagram readily available during taxi operations.

NOTAMs: Provide current information about closed taxiways, construction, or temporary restrictions that could affect helicopter operations. Helicopter operations may be affected by NOTAMs that don’t impact fixed-wing aircraft due to our unique operational requirements.

Taxi Instructions and Clearances (K2)

Ground control clearances for helicopters often include specific routes and altitudes. Key elements include:

• Route clearance: “Taxi via Alpha, Bravo to runway 27”
• Altitude restrictions: Some airports require helicopters to taxi at specific altitudes to maintain separation
• Hold short instructions: Critical for runway safety
• Frequency changes: Coordination between ground and tower controllers

Teaching technique: Use the phonetic alphabet consistently and emphasize proper readback procedures. Students must understand that taxi clearances are not requests but mandatory instructions.

Airport Signs, Markings, and Lighting (K3)

Helicopter pilots must interpret the same ground markings as fixed-wing aircraft but with additional considerations:

Runway/Taxiway Markings:

• Yellow centerline markings indicate taxiways
• White markings indicate runways
• Hold short markings are mandatory stop points

Signage:

• Direction signs (yellow with black text)
• Location signs (black with yellow text)
• Mandatory instruction signs (red with white text)

Lighting:

• Blue edge lights mark taxiways
• Green centerline lights provide guidance
• Red stop bar lights indicate mandatory holds

Teaching analogy: Airport markings are like traffic signs on highways - they provide critical safety information that must be followed precisely.

Wind Indicators (K4)

Ground operations require constant wind awareness:

• Windsocks: Primary visual indicator
• ATIS/AWOS information: Provides current wind data
• Tower wind reports: Real-time updates during taxi operations
• Visual cues: Dust, smoke, or vegetation movement

Wind affects helicopter taxi operations more significantly than fixed-wing aircraft due to our larger rotor disc area and higher center of gravity.

Aircraft Lighting (K5)

Proper lighting enhances safety and compliance:

• Anti-collision lights: Required during all operations
• Position lights: Required during low visibility
• Landing lights: Improve visibility to other aircraft and ground personnel
• Taxi lights: Illuminate the taxi path during night operations

Pre-Taxi Procedures (K6)

Route Planning: Always plan the taxi route before engine start. Identify:

• Departure runway
• Taxi route to runway
• Hot spots along the route
• Alternative routes if primary route is blocked

Hot Spot Identification: These are areas with increased risk of runway incursions or ground conflicts. Common helicopter hot spots include:

• Complex intersections
• Areas where helicopter and fixed-wing traffic converge
• Construction zones
• Areas with limited ground control visibility

Safe Taxi Procedures (K7)

Towered Airports:

• Obtain clearance before movement
• Monitor ground control frequency
• Follow assigned routes precisely
• Request progressive taxi if uncertain

Non-towered Airports:

• Monitor CTAF frequency
• Announce taxi intentions
• Coordinate with other traffic
• Use standard taxi patterns when established

Teaching emphasis: At non-towered airports, pilots become their own air traffic controllers and must maintain situational awareness through radio communication and visual scanning.

Runway Operations (K8)

Entering Runways:

• Explicit clearance required at towered airports
• “Line up and wait” vs. “Cleared for takeoff”
• Positive communication required at non-towered airports

Crossing Runways:

• Always requires specific clearance at towered airports
• Stop at hold short lines until cleared
• Expeditious crossing when cleared
• Monitor for landing traffic

Common Errors (K9)

• Speed control errors: Too fast during turns or in congested areas
• Wind compensation errors: Failing to adjust controls for wind conditions
• Navigation errors: Wrong turns or missed hold points
• Communication errors: Incomplete readbacks or missed instructions
• Situational awareness errors: Failure to maintain adequate clearances

Risk Management

Activities and Distractions (R1): Cockpit management during taxi is critical. The “sterile cockpit” concept applies to taxi operations - avoid non-essential activities. Common distractions include:

• Passenger conversations
• Cell phone use
• Excessive checklist activity while moving
• Fixation on cockpit instruments

Confirmation Bias (R2): Pilots often hear what they expect to hear rather than actual instructions. This is particularly dangerous with:

• Similar-sounding runway numbers
• Amendment to previous clearances
• Complex routing changes
• Hold short vs. cleared to cross instructions

Teaching technique: Always require full readback and use the “question-challenge-respond” method when instructions seem unusual.

Runway Incursion Prevention (R3): The leading cause of ground accidents. Prevention strategies include:

• Positive identification of hold lines
• Complete stop at hold lines
• Visual verification before crossing
• Continuous radio monitoring
• Situational awareness of other traffic

Speed Control (R4): Excessive speed during taxi leads to:

• Loss of directional control during turns
• Increased stopping distance
• Higher risk of dynamic rollover
• Rotor clearance issues

Teaching analogy: Taxi speed should be similar to a brisk walk - fast enough to maintain efficiency but slow enough to stop safely if needed.

Thrust Vector and Brake Usage (R5): Improper technique can cause:

• Excessive forward motion when adding collective
• Aft cyclic creating rearward thrust during braking
• Over-reliance on brakes leading to overheating
• Uncoordinated control inputs causing directional control issues

Rotor Clearances (R6): Critical safety consideration unique to helicopters:

• Main rotor clearance from obstacles
• Tail rotor clearance awareness
• Ground personnel safety zones
• Other aircraft separation requirements

Minimum safe distances vary by aircraft type but generally require significant lateral spacing compared to fixed-wing aircraft.

Schedule

Equipment

• FAA-H-8083-21 Helicopter Flying Handbook (Chapters 8, 9)
• FAA-H-8083-25 Pilot’s Handbook of Aeronautical Knowledge (Chapter 14)
• Current airport diagram for local airport
• Chart Supplement for local area
• Helicopter flight manual/POH for specific aircraft type
• Whiteboard or flip chart for diagrams
• Taxi clearance examples and scenarios
• Wind direction indicator model or diagram
• Airport lighting chart/reference
• Video examples of proper taxi technique (if available)

Instructor Actions

The CFI candidate will:

1. Explain airport reference usage by demonstrating how to locate taxi routes, hot spots, and helicopter-specific procedures using current Chart Supplement and airport diagrams

2. Demonstrate taxi clearance interpretation by providing example clearances and showing proper readback techniques, emphasizing critical elements like route, hold points, and frequency changes

3. Illustrate ground marking interpretation using airport diagrams to identify runway vs. taxiway markings, explaining the significance of colors and patterns for helicopter operations

4. Show wind assessment techniques by explaining multiple methods for determining wind direction and strength, emphasizing the impact on helicopter ground handling

5. Demonstrate control technique by explaining the coordination of cyclic, collective, and anti-torque pedals during taxi operations, including proper brake usage and thrust vector management

6. Present risk scenarios by discussing real-world situations involving runway incursions, wind-related incidents, and speed control issues, showing how proper technique prevents these hazards

7. Identify common errors by presenting typical student mistakes and demonstrating correction techniques, emphasizing the instructor’s role in error prevention and correction

8. Practice teaching scenarios by role-playing student-instructor interactions during taxi operations, demonstrating effective communication and correction techniques

Student Actions

The student (DPE) will:

1. Ask clarifying questions about specific taxi procedures, airport markings, or risk management techniques

2. Request explanation of complex taxi clearances or unusual airport configurations

3. Challenge teaching methods by questioning the effectiveness of presented techniques or requesting alternative approaches

4. Simulate common student errors to evaluate the CFI candidate’s ability to recognize and correct mistakes

5. Evaluate practical applications by requesting demonstration of specific scenarios or emergency procedures

6. Assess risk management understanding by presenting “what if” scenarios requiring decision-making and hazard assessment

7. Test knowledge depth through detailed questions about regulations, procedures, or aircraft-specific considerations

Completion Standards

The CFI candidate demonstrates satisfactory performance when able to teach taxi operations meeting ACS standards HI.VIII.D. Specifically, the candidate must show the ability to instruct students to:

• Complete appropriate checklists systematically and at proper times during taxi operations
• Use airport diagrams effectively for route planning and navigation, demonstrating proper chart interpretation techniques
• Position nosewheel appropriately (locked/unlocked based on aircraft type and conditions) when applicable to specific helicopter models
• Apply proper control inputs for existing wind conditions, maintaining directional control throughout taxi operations
• Coordinate flight controls (cyclic, collective, anti-torque pedals, and brakes) to maintain appropriate taxi speed and directional control
• Maintain powerplant parameters within normal operating limits during all taxi phases
• Maintain track within 2 feet of centerline or assigned taxi route
• Position accurately relative to hold lines and specified points, demonstrating precision ground handling
• Communicate effectively with ATC, providing complete readbacks and acknowledging all clearances appropriately
• Comply with ground markings and lighting systems, demonstrating proper interpretation and response to airport signage
• Analyze and correct errors effectively, showing both recognition skills and appropriate correction techniques

The CFI candidate must demonstrate teaching competency through clear explanations, appropriate use of teaching aids, and the ability to recognize and correct common student errors while maintaining safety as the primary consideration throughout all taxi operations.