ASN Wikibase Occurrence # 43953
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| Date: | Friday 10 November 2006 |
| Time: | 21:45 |
| Type: |  Glasair GlaStar |
| Owner/operator: | Private |
| Registration: | N441AV |
| MSN: | 041 |
| Engine model: | Subaru 2.5L |
| Fatalities: | Fatalities: 1 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Snow Shoe, PA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Linden, NJ (LDJ) |
| Toledo, OH (TDZ) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While in cruise flight, the engine lost power, and the pilot performed a nighttime forced landing to a wooded area. A subsequent examination of the engine revealed a loose timing belt, and the idler pulley, upon which the cam belt would normally have run, was missing. There was also a broken stud in the location where the idler pulley should have been. The loose cam belt resulted in the camshafts being out of timing, allowing the valves to contact each other and bend. The original attach bolt for the missing idler pulley had been replaced by the airplane builder, who was not the current owner, with a 6-inch stud to mount an additional alternator. The mounting stud had been sleeved with a spacer to maintain a mounting distance between the alternator and the engine. The weight of the alternator and its mounting distance from the engine resulted in excessive stress to the mounting stud, which eventually broke.
Probable Cause: The builder's improper installation of an additional alternator. Contributing to the accident were the night lighting conditions.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20061206X01741&key=1
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Oct-2008 00:45 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 05-Dec-2017 09:30 | ASN Update Bot | Updated [Operator, Other fatalities, Source, Narrative] |
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