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| Date: | Tuesday 25 June 1996 |
| Time: | 14:30 LT |
| Type: |  Fairchild SA227-AC Metro III |
| Owner/operator: | Mesaba Airlines |
| Registration: | N2692P |
| MSN: | AC-658B |
| Total airframe hrs: | 16127 hours |
| Engine model: | Garrett TPE331 |
| Fatalities: | Fatalities: 0 / Occupants: 19 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Grand Forks, ND -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | , ND (KGFK) |
| Minneapolis, MN | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The captain reported that the airplane was at 5,000 feet mean sea level, the propeller rpm was 100 percent, and other engine indications were normal. A loss of power on the number two engine was 'sudden and immediate.' The flightcrew declared an emergency and recovered visually to Grand Forks without further incident. Examination of the airplane revealed eleven impact marks to the right side of the fuselage. Two of the impacts penetrated the fuselage side. Examination of the engine revealed evidence of overload failure and penetration of the gear box. Fatigue fractures in the second stage compressor impeller rim emanated from a heat affected, rubbed area on the impeller blades. A corresponding rubbed area was evident on the impeller shroud, and aluminum material was fused to the titanium impeller. No evidence of material defects were noted.
Probable Cause: insufficient clearance between the second stage compressor impeller and the shroud. A factor was the subsequent fatigue failure of the impeller.
Accident investigation:
 |
|
Sources:
NTSB CHI96FA216
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 15:09 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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