ASN Wikibase Occurrence # 368962
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| Date: | Saturday 8 April 1989 |
| Time: | 12:00 LT |
| Type: |  Mooney M20F |
| Owner/operator: | Joseph Leyva |
| Registration: | N9705M |
| MSN: | 670265 |
| Total airframe hrs: | 3323 hours |
| Engine model: | LYCOMING IO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Prescott, AZ -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | (KPRC) |
| Winslow, AZ (KINW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE AIRPORT ELEVATION WAS 5,042 FEET, AND THE DENSITY ALTITUDE WAS 7,600 FEET. THE FLIGHT INSTRUCTOR STATED THEY HAD ABORTED THE FIRST TAKEOFF ATTEMPT BECAUSE THE ENGINE RPM WAS INSUFFICIENT FOR TAKEOFF. ON THE NEXT ATTEMPT, THE AIRPLANE BECAME AIRBORNE AND FLEW IN GROUND EFFECT. THE ENGINE RPM WAS INSUFFICIENT TO SUSTAIN FLIGHT. THE FLIGHT INSTRUCTOR TOOK CONTROL AND BANKED THE AIRPLANE TO AVOID POWERLINES. THE AIRPLANE DESCENDED INTO AN OPEN FIELD. THE CFI DID NOT LEAN THE MIXTURE FOR TAKEOFF. HE SAID HE BELIEVED THE CARBURETOR HAD AN AUTO-LEAN FEATURE AND HE DID NOT HAVE TO LEAN THE MIXTURE. THE IO-360 ENGINE IS FUEL INJECTED AND DOES NOT HAVE AUTO-LEAN. POST ACCIDENT ENGINE RUN REVEALED THE ENGINE WAS CAPABLE OF NORMAL OPERATION WITH FUEL MIXTURE PROPERLY SET.
Probable Cause: THE FAILURE OF THE PLT TO LEAN THE FUEL MIXTURE FOR THE HIGH DENSITY ALTITUDE. CONTRIBUTING TO THE ACCIDENT WAS THE CFI'S LACK OF FAMILIARITY WITH THE AIRPLANE AND ENGINE OPERATING PROCEDURES.
Accident investigation:
 |
|
Sources:
NTSB LAX89LA151
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Mar-2024 09:21 | ASN Update Bot | Added |
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