ASN Wikibase Occurrence # 366669
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| Date: | Monday 2 July 1990 |
| Time: | 14:00 LT |
| Type: |  Mitsubishi MU-2B |
| Owner/operator: | Flight International |
| Registration: | N722DM |
| MSN: | 245 |
| Year of manufacture: | 1972 |
| Total airframe hrs: | 7059 hours |
| Engine model: | GARRETT TPE-331-251 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Tyndall Afb, FL -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT NOTED A SEVERE VIBRATION IN FLIGHT FROM THE LEFT ENGINE. HE SHUT THE ENGINE DOWN AND LANDED. ONE PROPELLER BLADE WAS MISSING PART OF THE BLADE. THE FAILED ASSEMBLY WAS EXAMINED AND THE FAILED BLADE SHOWED EVIDENCE OF HIGH CYCLE, LOW STREES FATIGUE WITH A SURFACE ORIGIN. THE OTHER TWO BLADES WERE FOUND TO BE LESS THAN MINIMUM DIMENSIONS AND HAD IMPROPERLY POLISHED AND PROTECTED SURFACES.
Probable Cause: A PROPELLER BLADE FATIGUE FAILURE DUE TO IMPROPER OVERHAUL BY OTHER MAINTENANCE PERSONNEL NOT PERFORMING OVERHAUL IN ACCORDANCE WITH FACTORY SERVICE BULLETINS.
Accident investigation:
 |
|
Sources:
NTSB MIA90IA148
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2024 10:55 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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