Traffic Patterns

Objective

Upon completion of this lesson, the student will demonstrate proficiency in helicopter traffic pattern operations at both towered and non-towered airports/heliports by performing traffic pattern entries, departures, and circuits while maintaining proper altitude (±100 feet), airspeed (±10 knots), and situational awareness in accordance with FAA-S-ACS-15 Area of Operation III, Task C.

Content

Regulatory Foundation

Traffic pattern operations are governed by 14 CFR 91.126 (non-towered airports), 14 CFR 91.127 (airports with operating control towers), and 14 CFR 91.129 (Class D airspace). The Aeronautical Information Manual (AIM) Chapter 4 provides detailed guidance on airport operations and traffic patterns.

Helicopter-Specific Traffic Pattern Considerations

Unlike fixed-wing aircraft, helicopters have unique operational capabilities that affect traffic pattern procedures:

Helicopter Operations at Airports with Hard-Surfaced Runways:

• Helicopters should avoid the flow of fixed-wing traffic unless landing on the runway is intended
• When landing on taxiways or other areas, helicopters should avoid the flow of fixed-wing aircraft
• Helicopter approaches may be made to any point on the airport surface

Right-of-Way Rules (14 CFR 91.113):

• Aircraft on final approach has right-of-way over aircraft on the ground or in the pattern
• When two aircraft are approaching to land, the aircraft at the lower altitude has right-of-way
• Aircraft landing has right-of-way over aircraft taking off from the same runway
• In head-on situations, both aircraft should alter course to the right

Towered vs. Non-Towered Operations

Towered Airports (14 CFR 91.129):

• Two-way radio communication required
• ATC clearance required for all movements
• ATC may assign specific pattern altitudes and procedures
• Monitor ATIS/ASOS for current weather and airport information

Non-Towered Airports (14 CFR 91.126):

• Monitor CTAF for traffic and airport advisories
• Make standard position reports: entering pattern, downwind, base, final, clear of runway
• Use UNICOM for airport services information when available
• Self-announce intentions clearly and concisely

Standard Traffic Pattern Components

Pattern Altitude:

• Typically 1,000 feet AGL for helicopters (may vary by airport)
• Check Airport/Facility Directory (A/FD) for specific pattern altitudes
• Maintain altitude ±100 feet per ACS standards

Pattern Legs:

1. Upwind - Departure leg, straight out from runway
2. Crosswind - 90° turn from upwind, perpendicular to runway
3. Downwind - Parallel to runway, opposite direction of landing
4. Base - 90° turn from downwind, perpendicular to runway
5. Final - Aligned with runway centerline for landing

Wind Correction Techniques

Ground track control requires constant attention to wind conditions:

• Crab method: Heading adjusted to maintain desired ground track
• S-turns: May be necessary on final to maintain runway alignment
• Wind triangle principles: Apply heading corrections based on wind velocity and direction

Automated Weather Information

ATIS (Automatic Terminal Information Service):

• Updated hourly or when significant weather changes occur
• Provides current weather, active runways, NOTAMs, and remarks
• Use phonetic identifier to confirm you have current information

ASOS/AWOS:

• Continuous weather broadcasts
• Critical for determining active runway and wind conditions
• Update every minute for current conditions

Risk Management Items

Collision Hazards:

• Maintain visual scanning throughout pattern operations
• Use proper radio phraseology and position reporting
• Be aware of blind spots created by aircraft structure
• Monitor for aircraft not equipped with radios at non-towered airports
• Understand that not all aircraft may be on frequency

Task Prioritization and Situational Awareness:

• Aviate, navigate, communicate priority
• Maintain aircraft control while managing radio communications
• Use written notes for complex clearances
• Brief pattern procedures before entering the airport environment
• Continuously update mental picture of traffic situation

Windshear and Wake Turbulence:

• Avoid operating directly behind larger aircraft
• Allow adequate time/distance separation from heavier aircraft
• Be prepared for windshear on approach and departure
• Consider helicopter wake turbulence effects on smaller aircraft
• Monitor windsock throughout pattern for wind changes

Airport Markings and Lighting

Runway Markings:

• Runway numbers indicate magnetic heading rounded to nearest 10°
• Threshold markings indicate landing area beginning
• Displaced threshold areas are not suitable for landing

Taxiway Markings:

• Yellow centerline and edge markings
• Hold short lines (solid and dashed) at runway intersections
• ILS critical area markings where applicable

Airport Lighting Systems:

• Runway edge lights (white, amber on last 2,000 feet)
• Taxiway edge lights (blue)
• Threshold lights (green on approach end, red on departure end)
• Rotating beacon indicates airport location (green/white for civilian)

Schedule

Equipment

Required References:

• FAA-S-ACS-15 Private Pilot Helicopter Airman Certification Standards
• 14 CFR Parts 61, 91
• FAA-H-8083-21B Helicopter Flying Handbook
• Aeronautical Information Manual (AIM)
• Local sectional chart
• Airport/Facility Directory

Equipment and Materials:

• Helicopter Flight Manual/POH
• Current sectional charts
• Airport diagrams for training airports
• Kneeboard and pencil
• Aviation headset with functioning microphone
• Current ATIS/AWOS frequencies
• CTAF frequency reference

Visual Aids:

• Airport diagram posters
• Traffic pattern diagram
• Wind triangle demonstration materials
• Airport lighting photographs
• Runway/taxiway marking examples

Instructor Actions

1. Begin with weather briefing using current ATIS/AWOS information, emphasizing wind conditions and active runways while demonstrating proper information interpretation techniques.

2. Review airport diagram with student, identifying runway numbers, taxiways, pattern directions, and any unique features or restrictions specific to the training airport.

3. Demonstrate proper radio phraseology for both towered and non-towered environments, emphasizing clear, concise communications and standard position reporting procedures.

4. Explain wind correction principles using wind triangle concepts, showing how to determine crab angle and ground track corrections for maintaining proper pattern geometry.

5. Conduct thorough pre-flight inspection focusing on items critical for airport operations including radios, transponder, and navigation equipment functionality.

6. Demonstrate pattern entry procedures at towered airport, showing proper ATC communication, clearance acknowledgment, and compliance with assigned altitudes and routing.

7. Fly demonstration pattern emphasizing altitude control within ±100 feet, airspeed maintenance within ±10 knots, and proper spacing from other traffic.

8. Show wind correction techniques during each pattern leg, particularly demonstrating crab adjustments on crosswind and final approach legs.

9. Transit to non-towered airport while explaining frequency changes, weather monitoring, and traffic awareness techniques during cross-country portion.

10. Demonstrate CTAF procedures including pattern entry announcement, position reports, and landing intentions while maintaining situational awareness of other traffic.

11. Coach student through practice patterns, providing real-time feedback on altitude, airspeed, spacing, and radio communications.

12. Create scenarios involving traffic conflicts, ATC instructions, and weather changes to test student decision-making and prioritization skills.

13. Debrief each pattern sequence immediately after completion, highlighting successful techniques and identifying areas requiring additional practice.

14. Conclude with comprehensive performance assessment addressing all ACS knowledge, risk management, and skill requirements.

Student Actions

Pre-flight Phase:

• Obtain and interpret current weather information from ATIS/AWOS
• Review airport diagrams and identify key features, restrictions, and frequencies
• Calculate wind corrections for anticipated pattern work
• Complete aircraft pre-flight inspection with emphasis on communication equipment

Pattern Operations:

• Establish radio contact with ATC or announce intentions on CTAF
• Enter pattern according to published procedures or ATC instructions
• Maintain traffic pattern altitude within ±100 feet throughout pattern
• Control airspeed within ±10 knots of target approach speed
• Apply wind corrections to maintain proper ground track on all pattern legs
• Make required position reports at non-towered airports
• Maintain visual contact with runway/landing area throughout pattern
• Demonstrate proper spacing from other aircraft in pattern
• Execute smooth, coordinated turns at each pattern corner
• Respond appropriately to ATC instructions or traffic conflicts

Communication:

• Use standard phraseology for all radio transmissions
• Acknowledge ATC clearances using aircraft call sign
• Make clear, concise position reports at non-towered airports
• Monitor appropriate frequencies continuously
• Request clarification when instructions are unclear

Risk Management:

• Maintain continuous visual scanning for traffic
• Identify and avoid wake turbulence hazards
• Recognize and respond to changing wind conditions
• Prioritize aircraft control over communication tasks
• Demonstrate awareness of collision hazards and avoidance techniques

Completion Standards

The student demonstrates satisfactory performance when able to:

1. Identify and interpret airport features (FAA-S-ACS-15 PH.III.C) by correctly reading runway numbers, recognizing taxiway markings, and explaining the meaning of airport lighting systems with 100% accuracy.

2. Comply with traffic pattern procedures (FAA-S-ACS-15 PH.III.C) by executing proper pattern entries, maintaining correct pattern altitudes and airspeeds, and following published or assigned procedures without deviation.

3. Maintain altitude within ±100 feet (FAA-S-ACS-15 PH.III.C) throughout all pattern legs while simultaneously controlling airspeed within ±10 knots of target speeds.

4. Demonstrate wind drift correction (FAA-S-ACS-15 PH.III.C) by maintaining intended ground track within 50 feet of pattern centerline using appropriate crab angles and heading adjustments.

5. Maintain runway orientation (FAA-S-ACS-15 PH.III.C) by keeping the active runway in sight throughout pattern operations and correctly identifying runway/landing area alignment.

6. Demonstrate proper traffic spacing (FAA-S-ACS-15 PH.III.C) by maintaining at least 500 feet separation from other aircraft and avoiding interference with fixed-wing traffic flow.

7. Execute correct radio procedures by making all required position reports at non-towered airports and properly acknowledging ATC communications at towered facilities using standard phraseology.

8. Apply risk management principles by continuously scanning for traffic, identifying wake turbulence hazards, recognizing windshear conditions, and maintaining situational awareness throughout pattern operations.

9. Respond appropriately to traffic conflicts by taking immediate evasive action, communicating intentions clearly, and applying right-of-way rules correctly in accordance with 14 CFR 91.113.

10. Complete pattern operations without exceeding aircraft limitations, violating airspace restrictions, or creating hazardous situations for other aircraft or persons on the ground.