NTSB Identification: ATL97LA069.
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Accident occurred Tuesday, April 29, 1997 in CARROLLTON, GA
Probable Cause Approval Date: 01/07/1998
Aircraft: Beech 33, registration: N5863S
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The instrument flight was cleared to a cruise altitude of 6000 feet. A few minutes into the flight, the pilot experienced a reduction in engine power. He declared an emergency and attempted to restore the engine to full operating power. The pilot said he increased the fuel mixture lever to full rich, turned on the fuel system boost pump, but could not restore full engine power. After completing the emergency procedures, the pilot was instructed, by air traffic control, to turn to a 125 degree magnetic heading for vectors to the nearest airport. After descending below the clouds, the pilot established a final approach for the emergency landing. As he flared for the touchdown on the runway, the pilot recalled that the aircraft stall warning horn was blaring. The pilot also stated that the flight controls were barely responsive as the left wing collided with the ground. The examination of the engine assembly disclosed that the propeller pitch control arm, at the propeller governor, had separated from the propeller governor. A review of service data disclosed that a service bulletin had been issued to prevent the separation of the governor control arm from the assembly. This service bulletin had not been accomplished on the accident airplane. The governor control arm separation occurred four flight hours after the last annual inspection.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The inadequate maintenance inspection of the airplane that resulted in the disconnection of the propeller governor linkage and the subsequent reduction in engine power. The pilot also failed to maintain flying speed that resulted in an inadvertent stall during the forced landing.

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