ASN Wikibase Occurrence # 36350
Last updated: 22 July 2014
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Date:20-SEP-1992
Time:2001
Type:Silhouette image of generic M20T model; specific model in this crash may look slightly different
Mooney M20K
Owner/operator:T And S Rentals
Registration: N99693
C/n / msn: 25-0548
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Airplane damage: Written off (damaged beyond repair)
Location:Weston, WV -   United States of America
Phase: En route
Nature:Private
Departure airport:Charleston, WV (CRW)
Destination airport:Morgantown, WV (MGW)
Narrative:
AFTER BEING ALERTED TO AN OIL STREAK ALONG THE SIDE OF THE AIRPLANE, THE PILOT CHECKED THE OIL AND THEN DEPARTED ON A NIGHT FLIGHT OVER HILLY TERRAIN. WHILE IN CRUISE FLIGHT, THE PILOT REPORTED 'MOTOR TROUBLES' TO APPROACH CONTROL AND RECEIVED VECTORS TO THE CLOSEST AIRPORT. THIS AIRPORT HAD NO RUNWAY LIGHTING. THE PILOT WAS ABLE TO MAINTAIN PARTIAL POWER FOR ABOUT 14 MINUTES. DURING THIS TIME, THE ATC CONTROLER WAS UNSUCCESSFUL IN ATTEMPTS TO TURN ON THE RUNWAY LIGHTS AT THE CLOSEST AIRPORT, AND WAS UNAWARE THE LIGHTS WERE OUT OF SERVICE. THE PILOT THEN REPORTED 'ITS DEAD' AS HE APPROACHED THE AIRPORT. HE WAS UNABLE TO LAND AT THE UNLIT AIRPORT, DESPITE GUIDANCE FROM ATC AND ANOTHER AIRPLANE WHICH WAS IN THE VICINITY. THE AIRPLANE IMPACTED TERRAIN AND WAS DESTROYED. AN EXAM OF THE ENGINE REVEALED THE NO. 1 CYLINDER HAD SEPARATED FROM THE ENGINE CRANKCASE IN FLIGHT. A METALLURGICAL EXAM REVEALED EVIDENCE OF FRETTING DAMAGE ON THE ATTACHMENT FLANGE AND FATIGUE FAILURE OF THE ATTACHING THROUGH BOLTS AND HOLD DOWN STUDS. CAUSE: TOTAL LOSS OF ENGINE POWER DUE TO THE INADEQUATE TORQUE OF THE NO. 1 CYLINDER ATTACH BOLTS AND STUDS, FATIQUE FAILURE OF THE BOLTS/STUDS, AND SEPARATION OF THE NO. 1 CYLINDER. FACTORS RELATED TO THE ACCIDENT WERE: DARKNESS AND HILLY TERRAIN, WHICH WERE UNSUITABLE FOR A FORCED LANDING.

Sources:
NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001211X15608


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
Number of views: 746

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