ASN Wikibase Occurrence # 211949
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| Date: | Thursday 7 June 2018 |
| Time: | 10:24 |
| Type: |  Beechcraft F33A Bonanza |
| Owner/operator: | Private |
| Registration: | N3291X |
| MSN: | CE-1593 |
| Year of manufacture: | 1991 |
| Total airframe hrs: | 3215 hours |
| Engine model: | Continental IO-550-BA |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Uvalde County, near Concan, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | George West, TX (8T6) |
| Ruidoso, NM (SRR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot departed on a cross-country flight, which was the second flight after recent maintenance. The pilot reported that, about 48 minutes into the flight at 8,500 ft mean sea level, the manifold pressure suddenly dropped with a simultaneous engine explosion; oil was on the windshield, and “there was fire everywhere.” He reduced the mixture, throttle, and propeller controls. The pilot reported the emergency to air traffic control and received vectors to the closest airstrip, which was about 6 nautical miles south-southeast. He indicated that he had difficulty maintaining glide speed because the nose of the airplane was pitching upward. During the descent, he extended the landing gear, and the airplane impacted trees and terrain and came to rest about 500 yards west of the intended runway. The airplane was destroyed by a postimpact fire.
A postaccident examination of the airplane revealed that the engine exhibited excessive heat signatures consistent with a lack of oil lubrication. The lack of oil resulted in the No. 2 connecting rod becoming disconnected from the crankshaft, which punctured a large hole in the crankcase. The engine oil filter was found loose on its mount and safety wired in the counterclockwise direction. During the examination, when the oil filter was manually rotated about one-half turn clockwise to tighten, the safety wire prevented it from further rotation; however, the oil filter could have rotated further. Due to the fire damage, investigators could not determine if there had been a gasket installed between the oil filter and mount. The exhaust manifold directly underneath the oil filter had burn marks, which were likely from oil that had leaked from the oil filter onto the exhaust manifold. Based on the available evidence, it is likely that the loose oil filter allowed oil to leak from the engine and resulted in oil starvation and a total loss of engine power.
Probable Cause: The loose oil filter, which resulted in oil starvation and a total loss of engine power in flight.
Accident investigation:
 |
|
Sources:
NTSB
Location
Images:
Photo: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Jun-2018 14:04 | Geno | Added |
| 10-Jun-2018 08:44 | flightstar_john | Updated [Cn, Phase, Nature, Damage, Narrative] |
| 10-Jun-2018 13:43 | Anon. | Updated [Aircraft type, Source] |
| 10-Jun-2018 17:15 | Anon. | Updated [Source] |
| 13-Feb-2019 06:59 | harro | Updated [Time, Aircraft type, Registration, Operator, Departure airport, Destination airport, Source, Narrative, Photo] |
| 08-Jun-2020 08:37 | ASN Update Bot | Updated [Time, Departure airport, Destination airport, Source, Narrative, Accident report, ] |
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