ASN Wikibase Occurrence # 38599
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| Date: | Thursday 28 March 1991 |
| Time: | 07:40 |
| Type: |  Piper PA-24-250 |
| Owner/operator: | Nichols Brothers Boatbuilders |
| Registration: | N6044P |
| MSN: | 24-1140 |
| Total airframe hrs: | 3651 hours |
| Fatalities: | Fatalities: 1 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Chehalis, WA -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Everett, WA (PAE) |
| Vancouver, WA (59S) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING A CROSS COUNTRY FLT, THE ENG LOST PWR. DURING THE EMERGENCY DESCENT, THE AIRPLANE COLLIDED WITH A BUILDING. THE POST CRASH ENG INSPECTION REVEALED THAT THE CRANKSHAFT GEAR WAS NOT SEATED PROPERLY DURING THE MAJOR OVERHAUL, WHICH RESULTED IN THE FATIGUE FAILURE OF THE CRANKSHAFT DOWEL. FURTHER RESEARCH REVEALED THAT DURING THE ENG OVERHAUL, A SERVICE BULLETIN WAS NOT COMPLIED WITH TO INSTALL A CRANKSHAFT GEAR THAT WAS MANUFACTURED WITH THREE, THREE QUARTOR INCH RADIUS SCALLOPS. THESE SCALLOPS ALLOW FOR INSPECTION OF THE GEAR AND CRANKSHAFT ASSEMBLY. CAUSE: A LOSS OF ENGINE POWER DUE TO AN IMPROPER OVERHAUL.
Sources:
NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001212X16697
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
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