ASN Wikibase Occurrence # 359638
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Date: | Saturday 22 October 1994 |
Time: | 14:08 LT |
Type: | Piper PA-18 |
Owner/operator: | University Of North Dakota |
Registration: | N587PA |
MSN: | 1809033 |
Year of manufacture: | 1989 |
Total airframe hrs: | 1809 hours |
Engine model: | LYCOMING O-320-A2B |
Fatalities: | Fatalities: 0 / Occupants: 2 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Grand Forks, ND -
United States of America
|
Phase: | En route |
Nature: | Training |
Departure airport: | Inkster, ND (ND24) |
Destination airport: | (KGFK) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE FLIGHT INSTRUCTOR AND STUDENT WERE EN ROUTE BACK TO THEIR HOME BASE AFTER PRACTICING LANDINGS AT A LOCAL AIRPORT. APPROXIMATELY EIGHT MILES FROM THEIR DESTINATION, THE ENGINE BEGAN TO RUN ROUGH. THE PROPELLER BECAME UNATTACHED AND THE ENGINE COMPLETELY STOPPED RUNNING. A FORCED LANDING WAS MADE ON A FIELD WITHOUT FURTHER INCIDENT. POSTACCIDENT EXAMINATION REVEALED THE CRANKSHAFT HAD COMPLETELY FRACTURED. EXAMINATION OF THE CRANKSHAFT REVEALED A FATIGUE FAILURE INITIATING FROM AN OIL TRANSFER TUBE HOLE. THIS ORIGIN HOLE WAS FOUND TO HAVE AN ENLARGED DIAMETER PORTION ABOVE THE SPECIFIED VALUE. EXAMINATION OF THE AIRPLANE'S LOGBOOK REVEALED THIS AIRPLANE WAS INVOLVED IN A PROPELLER STRIKE FOUR YEARS AND 1,220 FLIGHT HOURS PRIOR TO THIS ACCIDENT.
Probable Cause: the fatigue failure of the crankshaft.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | CHI95LA024 |
Status: | Investigation completed |
Duration: | 8 months |
Download report: | Final report |
|
Sources:
NTSB CHI95LA024
Location
Revision history:
Date/time | Contributor | Updates |
15-Mar-2024 13:04 |
ASN Update Bot |
Added |
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