Tail Rotor Failure; Yaw Control Failure - Guimbal CABRI G2 Flight Manual

Hélicoptères Guimbal
CABRI G2

Tail rotor failure

It could consist either in a tail rotor transmission failure, or in a tail rotor loss.
This failure can be detected by sudden yaw acceleration - nose to the left -
and/or totally ineffective pedals.
Caution : Nose to the right : probable engine failure
Hovering IGE :
1. LAND IMMEDIATELY,
2. Reduce throttle in order to reduce left yaw rate,
3. Cushion contact with the ground by applying collective pitch up
to high stop if necessary.
Other flight cases :
1. Switch governor OFF,
2. Adjust power to maintain 70 to 80 kt IAS,
3. Reach an appropriate surface for an autorotation running
landing,
4. Enter autorotation, roll-off throttle to its stop and carry out a full
autorotation landing. Reduce airspeed as late as you can. Land
with as much airspeed as the surface permits.

Yaw control failure

Hovering IGE :
1. LAND IMMEDIATELY,
2. Lower the collective slowly enough to land smoothly, while
rolling-off throttle to reduce yawing nose to the right.
Other flight cases :
1. LAND AS SOON AS POSSIBLE,
2. Adjust IAS to 70 - 80 kt IAS,
3. Adjust power to minimize sideslip and keep nose to the right,
4. Reach an appropriate surface for a running landing.
Carry out a cautious landing. Reduce airspeed as late as you
can. Land with as much airspeed as the surface permits.
Note : Prefer wind from the right.
3-8
Nose to the left : probable tail rotor failure
EASA Approved
EMERGENCY PROCEDURES
SECTION 3
Original issue Issue 10