ERA12FA508 · Beech A36TC

The pilot and passenger were departing on an instrument flight rules business flight. During the initial climb, at an altitude of about 800 feet above the ground, the pilot advised air traffic control that the airplane had lost engine power. The pilot subsequently performed a forced landing; however, the airplane struck several trees about 1,000 feet short of an open field. Examination of the airframe revealed no deficiencies of the fuel or fuel system, and a test run of the engine showed that it was capable of producing power. However, during the test run, the right magneto was found to be non-functional, and further disassembly of the component revealed that its contact points were corroded. Once the corrosion was cleaned away, the magneto functioned normally on a test bench.

The investigation was unable to determine a definitive cause for the reported total loss of engine power, although a non-functional right magneto could result in a partial loss of power and/or perceived rough engine operation. According to the airframe manufacturer’s procedure for a loss of engine power immediately after liftoff, the auxiliary fuel pump should only be placed in the “HI” position in the event of an engine-driven fuel pump failure. With the engine-driven fuel pump operating, the engine would “run rich and may quit depending on throttle setting, temperature and altitude.” Due to the extent of the damage surrounding the auxiliary fuel pump switch, its preimpact position could not be determined.

Verbatim NTSB analysis and probable cause from the NTSB dataset