NTSB Factual Report

On April 6, 2015, at 1256 eastern daylight time, N4826H, a Mooney M20J airplane, was substantially damaged during a forced landing after a total loss of engine power shortly after takeoff from the Allentown Queen City Municipal Airport (XLL), Allentown, Pennsylvania. The commercial pilot and the passenger were not injured. The airplane was registered to and operated by a private individual. No flight plan was filed for the flight that originated at the Lehigh Valley International Airport (ABE), Allentown, Pennsylvania, about 1230. Visual meteorological conditions prevailed for the personal flight conducted under 14 Code of Federal Regulations Part 91.

According to the pilot, he conducted a preflight inspection of the airplane, which included visually checking the total amount of fuel in each fuel tank. He stated there was about 25 gallons of fuel in the left-wing fuel tank and about 7 or 8 gallons in the right-wing fuel tank. The pilot said the engine started normally and he taxied to the runway where he performed an engine run-up. The engine run up was normal and he confirmed the fuel selector was on the left-wing fuel tank. The pilot said he then departed and flew to XLL for the purpose of practicing takeoffs and landings. On the fourth takeoff, about 30 minutes into the flight, when the airplane reached an altitude about 400 to 500-feet-above the runway, the "engine quit." The pilot described the loss of power as an "instantaneous stop with no warning or sputtering." He then made a forced landing straight ahead and the airplane struck a wire-mesh fence that was supported with steel poles.

An initial postaccident examination of the airplane was conducted by the Federal Aviation Administration (FAA) about 30 minutes after the accident. According to an inspector, the left and right wings sustained substantial damage and the nose gear had collapsed. The inspector did not see any fuel leaking from the airplane and the fuel selector was in the "off" position. The throttle/propeller/fuel-mixture controls were all in the full forward position. Further examination of the airplane conducted the day after the accident by an FAA maintenance inspector revealed there was about 4-5 gallons of fuel in the right tank and about 8-12 gallons of fuel in the left tank. The inspector disconnected the fuel line from the engine driven fuel pump to the fuel servo and there was no fuel in the line. He then disconnected the fuel line that runs from the boost pump to the engine driven fuel pump and when the boost pump was turned on, fuel came out in a pulsating spray indicative of air in the line. The airplane was equipped with two fuel tanks in each wing for a total capacity of 64 gallons, of which 61 gallons were usable. No mechanical anomalies were noted that would have precluded normal operation of the engine.

The pilot held a commercial pilot certificate for airplane single-engine and multi-engine land, and instrument airplane. He reported a total of 3,029 flight hours, of which, 60 hours were in the accident airplane.

NTSB Probable Cause

A total loss of engine power during takeoff due to an interruption of fuel flow to the engine. The reason for the interruption of the fuel flow could not be determined during postaccident examination and testing.