ASN Wikibase Occurrence # 359301
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| Date: | Friday 24 February 1995 |
| Time: | 18:15 LT |
| Type: |  Pitts S-2B |
| Owner/operator: | Private |
| Registration: | N49335 |
| MSN: | 5102 |
| Year of manufacture: | 1986 |
| Total airframe hrs: | 708 hours |
| Engine model: | LYCOMING AEIO-540-D4A5 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Spokane, WA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | , WA (KSFF) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT OF THE AEROBATIC AIRPLANE WAS PRACTICING AN INVERTED FLAT SPIN WHEN THE PROPELLER AND CRANKSHAFT FLANGE SEPARATED FROM THE ENGINE. THE PILOT RECOVERED FROM THE MANEUVER, THEN MADE A FORCED LANDING ONTO A 780 FOOT MODEL AIRPLANE RUNWAY. THE AIRCRAFT OVERRAN THE END OF THE RUNWAY, THEN THE MAIN LANDING GEAR SETTLED INTO SOFT SOIL AND THE AIRCRAFT NOSED OVER. THE PILOT STATED THAT HE HAD NOT BEEN CONDUCTING RECURRENT CRANKSHAFT FLANGE INSPECTIONS, AS RECOMMENDED BY A MANUFACTURER'S SERVICE BULLETIN.
Probable Cause: FATIGUE FAILURE OF THE CRANKSHAFT. FACTORS WERE THE SOFT TERRAIN AND THE PILOT/OWNER'S FAILURE TO CONDUCT RECURRING CRANKSHAFT INSPECTIONS RECOMMENDED BY THE MANUFACTURER.
Accident investigation:
 |
|
Sources:
NTSB SEA95LA056
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 09:08 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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