ASN Wikibase Occurrence # 364951
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| Date: | Monday 8 July 1991 |
| Time: | 16:15 LT |
| Type: |  Cessna 320 |
| Owner/operator: | Private |
| Registration: | N3011T |
| MSN: | 320C0011 |
| Year of manufacture: | 1964 |
| Engine model: | CONTINENTAL TSI0-470 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Reno, NV -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | |
| Santa Maria, CA (SMX | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT STATED THAT HE APPLIED FULL POWER AND THE AIRCRAFT WAS ACCELERATING THROUGH 30 KNOTS ON THE TAKEOFF GROUND ROLL WHEN HE HEARD A LOUD EXPLOSION. THE PILOT ABORTED THE TAKEOFF AND TAXIED BACK TO THE RAMP. INSPECTION OF THE AIRCRAFT REVEALED THAT A CLAMP WHICH RETAINS ONE OF THE FEATHERING COUNTER WEIGHTS ON THE LEFT PROPELLER HAD SEPARATED, AND THE COUNTER WEIGHT PENETRATED THROUGH THE NOSE STRUCTURE OF THE AIRCRAFT. THE FAILED CLAMP ASSEMBLY WAS SENT TO THE FACTORY UNDER THE SUPERVISION OF THE FAA CHICAGO AIRCRAFT CERTIFICATION OFFICE FOR DETAILED ANALYSIS. ACCORDING TO THE REPORT OF THE EXAMINATION, THE FRACTURE WAS FOUND TO BE OF A FATIGUE TYPE, WITH THE ORIGIN ON THE LOWER INSIDE CORNER OF THE STEEL STRAP. CHEMICAL AND HARDNESS TESTS OF THE ASSEMBLY REVEALED THAT THE PART MET SPECIFICATIONS. THE REASON FOR THE FRACTURE INITIATION WAS UNDETERMINED.
Probable Cause: THE FATIGUE FAILURE OF THE PROPELLER FEATHERING COUNTER WEIGHT CLAMP ASSEMBLY.
Accident investigation:
 |
|
Sources:
NTSB LAX91LA300
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 20:37 | ASN Update Bot | Added |
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