MUSCLE SHOALS, AL, USA
N4780H
MOONEY M20J
ACCORDING TO WITNESSES, THE ENGINE DID NOT PRODUCE FULL POWER DURING TAKEOFf. A LONGER THAN NORMAL TAKE OFF ROLL OCCURRED, WHICH USED OVER HALF OF THE 4,000 FOOT LONG RUNWAY. THE PILOT REPORTED THAT THE POWER OUTPUT DECREASED AFTER BECOMING AIRBORNE. THE PILOT IMMEDIATELY ENTERED A DOWNWIND AND RETURNED TO THE DEPARTURE RUNWAY, AT LOW LEVEL. ON FINAL APPROACH, PRIOR TO REACHING THE RUNWAY, THE LEFT WING HIT THE GROUND AND THE AIRPLANE CARTWHEELED. FOLLOWING THE ACCIDENT, THE THROTTLE CABLE WAS FOUND LOOSE, WHICH PREVENTED OBTAINING FULL POWER. AN ENTRY IN THE AIRCRAFT LOG INDICATED THAT AN ANNUAL INSPECTION HAD BEEN PERFORMED THE PREVIOUS DAY. THE ENGINE LOG ALSO CONTAINED AN ENTRY INDICATING A 100 HOUR INSPECTION HAD BEEN ACCOMPLISHED THE PREVIOUS DAY.
On March 25, 1994, about 1430 central standard time, a Mooney M20J, N4780H, collided with the ground during a forced landing. The airplane was operated by the pilot under 14 CFR Part 91, and visual flight rules. Visual meteorological conditions prevailed. There were no injuries to the private pilot nor the passenger, and the airplane was substantially damaged. An instrument flight rules flight plan had been filed for the personal flight to Tallahassee, Florida. The flight was originating at the time of the accident. The takeoff from runway 36 was observed by a Flight Service Station specialist, who stated that the takeoff roll was unusually long, using over half of the 4,000 foot long runway, and that the engine did not sound as if full power had been achieved. After becoming airborne, the landing gear remained extended. A right downwind turn was made and the airplane proceeded back to the departure runway, at low level. Prior to reaching the runway, the airplane struck the ground with the left wing, east of the approach end of runway 36, and cartwheeled. An inspector from the Alabama Flight Standards District Office, Birmingham, Alabama, examined the wreckage. He reported that the throttle cable was loose. An entry in the aircraft log and the engine log indicated that an annual and a 100 hour inspection, respectively, had been performed on the previous day.
WAS THE LOOSE THROTTLE CABLE, AND THE PILOT'S FAILURE TO ABORT THE TAKEOFF WHEN THE ENGINE DID NOT PRODUCE FULL POWER. A FACTOR WAS THE INADEQUATE MAINTENANCE INSPECTION OF THE ENGINE.
Source: NTSB Aviation Accident Database
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