Accident Maule MXT-7-180A N152HS,
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ASN Wikibase Occurrence # 288015
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Date:Friday 1 October 2010
Time:20:00 LT
Type:Silhouette image of generic M7 model; specific model in this crash may look slightly different    
Maule MXT-7-180A
Owner/operator:Henderson State University
Registration: N152HS
MSN: 21095C
Engine model:Lycoming O-360-C4F
Fatalities:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Location:Magnolia, Arkansas -   United States of America
Phase: En route
Departure airport:Shreveport Regional Airport, LA (SHV/KSHV)
Destination airport:Arkadelphia, AR (M89)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The pilot was on a night cross-country flight when he heard a knocking sound in the engine. He immediately proceeded toward the nearest airport, declared an emergency, and noted that the oil pressure gauge read "0" and the oil temperature gauge read "high." When the airplane was about 5 miles south of the airport, and at an altitude of 1,700 feet, the engine seized. The pilot made a forced landing to a field and subsequently collided with a fence, causing substantial damage to the airplane. Examination of the engine revealed a large hole in the top of the crankcase and that the oil drain line for the No. 4 cylinder was not connected. A review of the engine logbook indicated that the No. 2 cylinder had been removed on the day of the accident, which would have required the No. 4 cylinder oil drain line to be disconnected. When the cylinder was placed back on the engine, the oil drain line was likely not reconnected and properly torqued per the manufacturer's maintenance manual.

Probable Cause: The mechanic's failure to properly install an oil drain line after he replaced a cylinder, which caused the engine to seize in flight due to a lack of lubrication.

Accident investigation:
Investigating agency: NTSB
Report number: CEN11LA005
Status: Investigation completed
Duration: 7 months
Download report: Final report




Revision history:

04-Oct-2022 17:43 ASN Update Bot Added

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