ASN Wikibase Occurrence # 354813
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| Date: | Sunday 8 February 1998 |
| Time: | 17:15 LT |
| Type: |  Mooney M20J |
| Owner/operator: | Private |
| Registration: | N4120H |
| MSN: | 24-0635 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 997 hours |
| Engine model: | Lycoming IO-360-A3B6D |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Davis, WV -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (WV62) |
| Harrisburg, PA (KCXY) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During takeoff and approximately 100 feet AGL, the engine began to run rough and lost power. The airplane touched down on a snow covered field, nosed over and came to rest inverted. The engine was tested and the fuel flow was found to fluctuate. The fuel injector servo system was tested and the following discrepancies were found: the safety wire attached to the plug utilized to adjust the diaphragms inside the fuel servo was missing its lead seal. One of the four fuel injector nozzles was blocked. Individual injector nozzles were tested. Debris blocked the flow in one nozzle, and the remainder of the fuel nozzles had an acceptable fuel stream. A representative from Aircraft Fuel Specialists, Ltd.. who conducted the testing, stated that the adjustment to the diaphragms would not cause the loss of power as described to him. He stated that the 'blockage of the inlet screen, which was completely plugged, and the one blocked nozzle were more a factor' in the loss of power.
Probable Cause: A loss of power due to blockage of the fuel screen and one of the four fuel injector nozzles. A contributing factor was snow covered terrain.
Accident investigation:
 |
|
Sources:
NTSB IAD98LA026
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Mar-2024 18:38 | ASN Update Bot | Added |
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