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ASN Wikibase Occurrence # 199946
Last updated: 28 November 2021
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Type:Silhouette image of generic C172 model; specific model in this crash may look slightly different
Cessna 172P Skyhawk
Registration: N5448K
MSN: 17274115
Fatalities:Fatalities: 0 / Occupants: 3
Other fatalities:0
Aircraft damage: Substantial
Location:A.B. Won Pat Guam International Airport (PGUM), Barrigada/Tamuning -   Guam
Phase: Landing
Departure airport:A.B. Won Pat Guam International Airport (PGUM), Barrigada/Tamuning
Destination airport:A.B. Won Pat Guam International Airport (PGUM), Barrigada/Tamuning
Investigating agency: NTSB
The commercial pilot reported that, during the local sightseeing flight, he noticed fire sparks and smoke starting to fill the cabin. Shortly after, the engine lost all power, and the airplane started to shake violently. The pilot decided to return to the airport, and while en route, he attempted to restart the engine without success. When he realized there was insufficient altitude to land on the runway, he initiated a forced landing to a nearby field. The airplane impacted terrain short of the airport perimeter fence and sustained substantial damage.

An engine examination revealed that the engine oil filler cap was not secured, and evidence of oil was found around the No. 4 cylinder and intake pipes. The pilot reported that he checked the oil level before the first flight of the day and then flew 10 more flights that day but did not check the oil level before those flights. The Pilot's Operating Handbook indicated that the oil quantity is to be confirmed and the oil filler cap is to be secured before each flight. It is likely that the pilot did not properly secure the oil filler cap during the preflight inspection before the first flight of the day and did not verify that it was secured before any of the following 10 flights, which resulted in a gradual leak of engine oil and subsequent engine seizure. Further, his failure to check the oil before the following 10 flights prevented him from identifying that the oil had leaked out and was at an insufficient level.

Probable Cause: The pilot's inadequate preflight inspection, which resulted in oil exhaustion and a subsequent total loss of engine power during cruise flight.


FAA register:

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 2 years and 6 months
Download report: Final report

Revision history:

25-Sep-2017 09:25 gerard57 Added
25-Sep-2017 14:38 Geno Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Nature, Destination airport, Source, Narrative]
26-Sep-2017 06:41 gerard57 Updated [Damage]
26-Sep-2017 06:48 Anon. Updated [Source, Damage, Narrative]
19-Apr-2020 07:01 ASN Update Bot Updated [Time, Operator, Country, Nature, Departure airport, Destination airport, Source, Narrative, Accident report, ]

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