A left stuck pedal is a condition where too much nose-left thrust is being produced by the tail rotor, causing uncontrollable leftward yaw.
Recognize the signs of a left stuck pedal and understand the recovery procedure.
- Recognition of stuck left pedal
- Recovery procedure
- Lucky Left - Rotten Right
- A stuck left pedal is most likely to be recognized during high-power configurations (eg, during departure or transitioning from a maximum performance take-off)
- As power is reduced, an uncommanded left yaw will develop (cannot be corrected with right pedal)
Avoidance and recovery
- Procedure 1-Landing without enough power to hover
- The power setting during the departure phase produces a no-yaw condition-the goal is to match this power setting during the landing
- This may be enough power to establish a hover, or to keep the aircraft aligned with the ground track for a run-on landing
- Maintain airspeed (eg, 60 KIAS) and fly a low pattern; the nose will be yawed left
- Decelerate during the approach using aft cyclic
- Apply collective to decelerate, maintain altitude, and alignment with the ground track
- With the nose aligned, allow the aircraft to make ground contact
Procedure 2-Landing with enough power to hover
- If the helicopter is completely decelerated and at 2-5′ AGL, landing can be accomplished by slowly lowering the collective
- Throttle can be adjusted to maintain alignment (reducing engine RPMs will decrease the TR thrust)
- Landing with a right crosswind can help counteract the excessive left yaw
Real-life advice and experience
- None specified
Note that this looks like a Eurocopter, which uses a clockwise-rotating MR. The left yaw at the termination of the landing may indicate that he had the equivalent of a stuck right pedal.