BELZONI, MS, USA
N3695X
Rockwell S2R
The pilot reported that shortly after lift-off on an aerial application flight, a partial power loss occurred. He was about to turn back to the airstrip, when the engine made a 'loud bang' and lost all power. Subsequently, the airplane was damaged during a forced landing in a cotton field. An engine teardown revealed that the #5 cylinder skirt had failed, which resulted in metal pieces spreading throughout the engine crankcase and oil system. Subsequently, the oil scavenger pump failed and the cam drive became galled and seized. There was evidence of fatigue where the #5 cylinder skirt had failed.
On July 13, 1996, about 0615 central daylight time, a Rockwell S2R, N3695X, operated by Gary Flying Service Inc., operating as a 14 CFR Part 137, aerial application flight, crashed during a forced landing near Belzoni, Mississippi. Visual meteorological conditions prevailed and no flight plan was filed. The airplane was destroyed. The commercial pilot was not injured. The flight had taken off for the purpose of performing an aerial application. At an altitude of about 150 feet mean sea level, the pilot stated that he noticed "a partial power loss." The pilot was about to turn back to the airstrip, when the engine made a "loud bang" and lost complete power. The pilot elected to land in a cotton field. According to his statement, "...[the pilot] immediately nosed [the airplane] over to maintain airspeed and at the last second before impact pulled hard back on the stick to raise nose before impact." The tail struck the ground first, the airplane bounced twice, turned to the west, and came to a stop approximately 200 feet from the touchdown point. The airplane crashed about 1 3/4 miles from the departure point. The airplane's engine had about 200 hours of service since being overhauled. On July 23, 1996, the FAA had the operator of the airplane tear down the engine. The teardown revealed that the cylinder No.5, skirt had "broken," resulting in metal pieces spreading throughout the crankcase, and the oil system, causing the oil scavenger pump to fail. According to the teardown report that was submitted by Gary Flying Service, and the facts concurred with by the FAA, "...[the] inspection determined probable metal fatigue on No.5 cylinder skirt [was] the cause of the engine failure."
fatigue failure of the #5 cylinder skirt, which resulted in debris that caused the oil scavenge pump to fail, oil starvation, cam drive seizure, loss of engine power, and a subsequent forced landing in a field of cotton.
Source: NTSB Aviation Accident Database
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