The following information is derived from the FAA's Service Difficulty Reports and Aviation Maintenance Alerts.


Cessna 172P Skyhawk

Loose Throttle Cable

Pilot noticed the throttle had no bounce at full travel. After the cowling was removed, it was discovered that the throttle control’s lower portion had come loose from the rest of the cable. When the throttle was moved, the cable would move full travel, but the inner cable was open to the elements. The cable was replaced with new one.

Part total time: Unknown

Cessna 208B Grand Caravan

Misrigged Throttle Control I

The pilot reported he ran out of throttle at 5800 feet msl with normal ITT. Engine was re-rigged and ops check flight was satisfactory.

Part total time: Unknown

Cessna 560XL Citation Excel

Misrigged Throttle Control II

The crew reported the right engine shut down during taxi, when the throttle was advanced. Maintenance rerigged the throttle adjustment IAW the maintenance manual. Post-maintenance engine runs and functional checks satisfactory.

Part total time: Unknown

Piaggio P.180 Avanti

Autofeather Failed To Arm

On the takeoff roll, the crew aborted due to the right engine’s autofeather system failing to arm and returned to the ramp. The throttle quadrant was replaced. Power control cam switch ops checked IAW maintenance manual. All ops checks were satisfactory. 

Part total time: Unknown

Pilatus PC-12/47

Stuck At Cruise Power

Power control lever stuck at cruise power while at altitude: When the crew tried to reduce power, the level could not be moved. Flight crew applied greater force and the power lever become unstuck and operated normally. After landing, maintenance personnel performed an inspection and function check of the engine power control but found nothing.

Maintenance records revealed an engine-compartment wash with soap and water was performed prior to the event flight. Suspect that water droplets on the power cable froze during flight. A maintenance alert will include new instructions for the task and the aircraft will be hangared for 12 hours so residual water can drain and/or evaporate.

Part total time: Unknown

Piper PA-28-181 Archer II/III

Jammed Carburetor Throttle

During routine maintenance, techs discovered the carburetor throttle was jammed.  It could not be determined what exactly was jamming, valve shaft, accelerator pump, or the valve itself.  The carburetor was removed from the aircraft and replaced. The carburetor was installed on the aircraft six months earlier.

Part total time: Unknown


Please enter your comment!
Please enter your name here