ASN Wikibase Occurrence # 365500
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| Date: | Friday 5 April 1991 |
| Time: | 12:00 LT |
| Type: |  Piper PA-28-161 |
| Owner/operator: | Northwest Flyers Inc |
| Registration: | N2366W |
| MSN: | 28-8516 046 |
| Total airframe hrs: | 3528 hours |
| Engine model: | LYCOMING O-320-D3G |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Schaumburg, IL -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE AIRPLANE'S ENGINE SEIZED AT 70 FEET ON TAKEOFF CLIMB, AND THE PILOT EXECUTED A FORCED LANDING. THE ENGINE HAD RECENTLY UNDERGONE REPLACEMENT OF THE NUMBER 1 CYLINDER; NO OTHER PARTS WERE CHANGED. PAINT MARKS ON THE REPLACEMENT CYLINDER INDICATED IT HAD BEEN CHROME PLATED TO STANDARD BORE. THE 3 REMAINING CYLINDERS AND ALL PISTONS WERE MARKED 0.010 OVERSIZE. THE OPERATOR'S DIRECTOR OF MAINTENANCE OBTAINED THE REPLACEMENT PART AND PROVIDED IT TO THE MECHANIC. THE OPERATOR'S MECHANIC STATED HE WAS UNAWARE WHAT THE CYLINDERS' COLOR MARKS SIGNIFIED AND HAD NOT MEASURED MATCHING PARTS DURING REPLACEMENT.
Probable Cause: THE MECHANIC'S NOT UNDERSTANDING THE IDENTIFYING MARKS ON THE REPLACEMENT PART. A FACTOR IN THE ACCIDENT WAS THAT THE MECHANIC WAS PROVIDED WITH AN IMPROPER PART.
Accident investigation:
 |
|
Sources:
NTSB CHI91LA121
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 10:49 | ASN Update Bot | Added |
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