ASN Wikibase Occurrence # 367624
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| Date: | Wednesday 6 December 1989 |
| Time: | 17:00 LT |
| Type: | WACO HRE |
| Owner/operator: | Birmingham Executive Aero Inc. |
| Registration: | N31654 |
| MSN: | 5157 |
| Engine model: | LYCOMING R-680 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Alexander City, AL -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Alexander City, AL |
| Birmingham, AL (BHM | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
SHORTLY AFTER TAKE OFF THE ENGINE LOST POWER. A FORCED LANDING WAS MADE ON A SANDY LAKE SHORE & THE AIRPLANE NOSED OVER. THE MAGNETO DRIVE GEAR & A BROKEN MAGNETO MOUNTING STUD HAD SEPARATED FROM THE ENGINE AND WAS FOUND NEAR THE WRECKAGE. THE ENGINE WAS OVERHAULED ABOUT 125 HRS PRIOR TO THE ACCIDENT AT WHICH TIME A USED CRANKSHAFT WAS INSTALLED. THE PILOT REPORTED THAT ABOUT 1 MONTH PRIOR TO THIS ACCIDENT THAT A SIMILAR INCIDENT OCCURRED WHEN BOTH MOUNTING STUDS BROKE. THIS WAS THE ONLY WACO HRE MODEL KNOWN TO BE ACTIVELY FLYING.
Probable Cause: AN ENGINE FAILURE DUE TO SEPARATION OF THE MAGNETO AS A RESULT OF A BROKEN MOUNTING STUD. THE MOUNTING STUD MOST LIKELY FAILED DUE TO VIBRATIONS INDUCED BY AN INADEQUATELY BALANCED CRANKSHAFT.
Accident investigation:
 |
|
Sources:
NTSB ATL90LA035
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Mar-2024 17:06 | ASN Update Bot | Added |
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