ASN Wikibase Occurrence # 363360
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Saturday 4 July 1992 |
| Time: | 09:15 LT |
| Type: | John Schackel Q2 |
| Owner/operator: | Private |
| Registration: | N84JS |
| MSN: | 2329 |
| Total airframe hrs: | 387 hours |
| Engine model: | REVMASTER 2100 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Rutland, IA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Fort Dodge, IA (KDOD) |
| Estherville, IA (KEST) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE ACCIDENT AIRPLANE WAS IN CRUISE FLIGHT WHEN THE PILOT NOTED AN ENGINE VIBRATION FOLLOWED BY AN INFLIGHT SEPARATION OF THE PROPELLER AND SPINNER. THE PILOT DECLARED AN EMERGENCY AND LANDED IN A SOYBEAN FIELD. DURING THE LANDING ROLL THE AIRPLANE NOSED OVER IN SOFT TERRAIN. THE PROPELLER AND SPINNER WERE RECOVERED STILL ATTACHED TO THE FRONT PORTION OF THE ENGINE CRANKSHAFT. EXAMINATION OF THE CRANKSHAFT SHOWED AN AREA OF WEAR AT THE KEYSLOT WHERE THE PROPELLER FLANGE IS FITTED OVER THE SHAFT. EXAMINATION OF THE INSIDE WALLS OF THE PROPELLER FLANGE SHOWED AN 'AREA OF CONCENTRATED FRETTING WHICH LEFT A DISTINCT WEAR MARK THAT MATCHES THE FRACTURE SURFACE OF THE FAILED CRANKSHAFT.' ACCORDING TO MAINTENANCE RECORDS THE CONVERTED AUTOMOTIVE ENGINE HAD BEEN IN SERVICE SINCE MAY 23, 1987 AND HAD ACCUMULATED APPROXIMATELY 387 HOURS IN SERVICE. THE LAST ANNUAL INSPECTION ON THE AIRPLANE WAS ACCOMPLISHED ON MAY 21, 1992, APPROXIMATELY 3 FLIGHT HOURS BEFORE THE ACCIDENT.
Probable Cause: A FATIGUE FAILURE OF THE ENGINE CRANKSHAFT DURING CRUISE FLIGHT.
Accident investigation:
 |
|
Sources:
NTSB CHI92DCD08
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Mar-2024 16:25 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation