ASN Wikibase Occurrence # 177918
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Narrative:According to the pilot, he had finished spraying a field and was returning to the airport for another load. He said that he had half a tank of fuel remaining and the engine was producing "excellent power." A few moments later, the engine ran rough for about a second and then stopped. He did not notice anything coming out of the exhaust. The pilot tried twice to restart the engine but was unsuccessful and he attempted a forced landing to an open field. During the landing, the airplane impacted terrain and struck a fence. Both wings were displaced aft and the right main landing gear was collapsed. A visual examination of the engine revealed a 360 degree crack around the P3 air pressure tube, causing a separation of the tube between the engine plenum and fuel control unit. The crack was approximately one-quarter inch aft of the "B" nut, which connects the P3 air pressure tube to the fuel control unit. There was a "notable" amount of carbon build-up in the area around the crack. According to a maintenance representative, failure of the tube in flight would have resulted in a "significant reduction in fuel scheduling which could result in an engine flameout." An attempt to restart the engine in flight would "likely have failed," however; an attempt would have accounted for the "notable" amount of carbon build-up around the break in the tube. No other aircraft anomalies were noted.
Rockwell S-2R Thrush Commander
|Fatalities:||Fatalities: 0 / Occupants: 1|
|Aircraft damage:|| Substantial|
|Location:||Beaver, UT -
United States of America
|Departure airport:||Beaver, UT (U52)|
|Destination airport:||Beaver, UT (U52)|
|Investigating agency: ||NTSB|
|Confidence Rating:|| Accident investigation report completed and information captured|
Probable Cause: the in-flight failure of the engine's P3 tube which resulted in the loss of engine power and the subsequent impact with terrain during a forced landing. Contributing factors include the lack of suitable terrain for a forced landing and the fence.
||ASN Update Bot
||Updated [Time, Damage, Category, Investigating agency]|
||ASN Update Bot
||Updated [Cn, Other fatalities, Departure airport, Destination airport, Source, Narrative]|
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