The Smart Marty Sky Dispatch
On the Record: Glasair Super IIS—Arizona:
A detached throttle linkage leads to a forced landing. The post On the Record: Glasair Super IIS—Arizona: appeared first on AvBrief.com.
August, 2018
About 35 minutes into the flight, the Experimental/Amateur-Built airplane’s alternator field toggle switch/breaker tripped. The pilot reset the switch, and all systems appeared normal. About 5 minutes later, the switch tripped again, and the pilot cycled the switch. About 2 minutes later, the pilot noticed that the engine manifold pressure was dropping, along with the airplane’s airspeed, consistent with a partial loss of engine power. The engine then experienced a total loss of power when he was maneuvering for an emergency landing to a nearby airport. The airplane subsequently landed short of the runway and sustained substantial damage to the aft fuselage.
Post-accident examination of the engine revealed that the throttle linkage had detached from the throttle arm of the fuel-injection servo. The rod-end bearing for the linkage and the throttle arm were intact and undamaged, but the connecting bolt and its associated washers, castellated nut, and cotter pin were missing. It is likely that the bolt securing the linkage had not been sufficiently tightened and secured with a cotter pin during the installation and that the error was not detected during the subsequent condition inspection.
The investigation determined that the electrical system malfunction was unrelated to the loss of engine power.
NTSB Final Report
NTSB Docket
The post On the Record: Glasair Super IIS—Arizona: appeared first on AvBrief.com.