ASN Wikibase Occurrence # 355850
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| Date: | Tuesday 20 May 1997 |
| Time: | 18:18 LT |
| Type: |  Mooney M20F |
| Owner/operator: | Private |
| Registration: | N6950V |
| MSN: | 22-1323 |
| Year of manufacture: | 1975 |
| Total airframe hrs: | 2739 hours |
| Engine model: | Lycoming IO-360 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Wheeling, IL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | (KPWK) |
| Madison, WI (KMSN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On the first flight after maintenance, the pilot reported that on the initial climb, 'the engine stopped producing power and began behaving erratically.' The pilot declared an emergency to the controlling ATC personnel, and turned back to Palwaukee Municipal Airport. The pilot reported that the engine, 'was backfiring and sounded like only one cylinder was hitting.' The pilot selected a field to execute a forced landing, circled it twice, and landed on an easterly heading. The pilot reported that the plane, after touch down, 'skidded and rolled for about 250 yards before coming to rest on the bank of a small creek.' The pilot evacuated the airplane and waited for assistance. Examination of the number four cylinder revealed excessive black carbon build-up on the cylinder head and exhaust valve seat.
Probable Cause: binding of the number four exhaust valve, which resulted in a partial power loss. A factor was the ravine.
Accident investigation:
 |
|
Sources:
NTSB CHI97LA142
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 16:18 | ASN Update Bot | Added |
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