ASN Wikibase Occurrence # 364452
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| Date: | Sunday 29 September 1991 |
| Time: | 09:30 LT |
| Type: | Davis D1K |
| Owner/operator: | Private |
| Registration: | N158Y |
| MSN: | 508 |
| Year of manufacture: | 1930 |
| Total airframe hrs: | 2300 hours |
| Engine model: | CONTINENTAL C-125 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Chester, CT -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | |
| Simsbury, CT (4B9) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT DEPARTED WITH A GLIDER IN TOW AND LOST POWER. HE CUT AWAY THE GLIDER WHICH LANDED WITH MINOR DAMAGE AND LANDED THE AIRPLANE IN A WOODED AREA. EXAMINATION OF THE ENGINE REVEALED IT WAS BEING OPERATED WITH AUTO GAS WITHOUT AN STC. A COMPRESSION CHECK THAT MEETS FAA SPECIFICATIONS HAD NOT BEEN CONDUCTED ON THE ENGINE SINCE 1963, AND CARBON LIKE COMBUSTION DEPOSITS HAD BUILT UP ON THE EXHAUST VALVE IN THE NUMBER 3 CYLINDER, KEEPING THE EXHAUST VALVE FROM CLOSING. THE AIRPLANE AND ENGINE WERE 6 HOURS OUT OF AN ANNUAL INSPECTION.
Probable Cause: IMPROPER MAINTENANCE ON THE ENGINE WHICH RESULTED IN A POWER LOSS DUE TO A STUCK EXHAUST VALVE AND SUBSEQUENT FORCED LANDING IN UNSUITABLE TERRAIN.
Accident investigation:
 |
|
Sources:
NTSB NYC91LA249
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 15:08 | ASN Update Bot | Added |
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