ASN Wikibase Occurrence # 35496
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| Date: | Wednesday 25 January 1989 |
| Time: | 18:12 |
| Type: |  Mooney M20F |
| Owner/operator: | private |
| Registration: | N3274F |
| MSN: | 670367 |
| Year of manufacture: | 1967 |
| Total airframe hrs: | 2975 hours |
| Engine model: | LYCOMING IO-360-A1A |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Truckee, CA -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | |
| San Martin, CA (Q99) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
BEFORE THE FLT, THE PLT WAS OBSERVED SCRAPING ICE FROM THE WINGS OF THE ACFT. THE ENG STARTED WITHOUT DIFFICULTY & THE PLT TAXIED TO RWY 28 TO TAKEOFF AT NGT. DURING THE INITIAL CLIMB, THE ACFT ENTERED A LEFT TURN AFTER PASSING THE END OF THE RWY. SUDDENLY, IT ENTERED A DESCENT & CRASHED ON SNOW COVERED TERRAIN. IMPACT OCCURRED ON A HDG OF 140 DEG. THE LEADING EDGES OF BOTH WINGS WERE FLATTENED AGAINST THE MAIN SPAR & THE FUSELAGE FORWARD OF THE EMPENNAGE WAS BUCKLED. A WITNESS STATED THAT THE ENG 'STALLED' BEFORE THE ACFT STARTED A DESCENT. A TEST OF THE FUEL INJECTOR REVEALED IT HAD AN INTERIOR LEAK AROUND THE MIXTURE CONTROL BUSHING SEAL, WHICH ALLOWED UNMETERED FUEL TO ENTER THE ENG. NO OTHER MECHANICAL PART FAILURE/MALFUNCTION WAS FOUND. THE airport ELEV WAS 5900'. TWO ACQUAINTANCES OF THE PLT SAID HE RPRTD A FUEL INJECTOR PROBLEM OR A FUEL MIXTURE PROBLEM. CAUSE: THE PILOT'S DECISION TO FLY WITH A KNOWN DEFICIENCY OF THE AIRCRAFT, THE WORN FUEL INJECTOR WITH AN INTERIOR LEAK, WHICH RESULTED IN LOSS OF ENGINE POWER, AND THE PILOT'S FAILURE TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN A STALL.
Sources:
NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X27604
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:22 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
Corrections or additions? ... Edit this accident description
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