ASN Wikibase Occurrence # 42583
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| Date: | Thursday 8 August 1985 |
| Time: | 11:15 LT |
| Type: |  Bell UH-1B |
| Owner/operator: | Skyline Air Service, Inc. |
| Registration: | N1385W |
| MSN: | 62-2072 |
| Total airframe hrs: | 5763 hours |
| Engine model: | LYCOMING T53-11D |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | St. James, LA -
 United States of America
|
| Phase: | |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
ACFT WAS AT A 150' HOVER PREPARING TO PICK UP A LOG WHEN IT EXPERIENCED A POWER LOSS. WITNESSES STATED THAT THEY HEARD A LOUD 'BANG' AND THE PILOT RADIOED 'GET OUT OF THE WAY'. ACFT AUTOROTATED THRU 60' TO 80' TREES WITH VERY LOW ROTOR RPM AND IMPACTED WITH NO HORZ SPEED AND HIGH VERTICAL SPEED. INVESTIGATION REVEALED THAT ENG HAD EXPERIENCED SEVERE INTERNAL DAMAGE. FOUR COMPRESSOR BLADES FROM THE 4TH STAGE ROTOR WERE FOUND TO HAVE SUFFERED PROGRESSIVE FATIGUE FAILURE, WHICH IN TURN CAUSED THE REMAINDER OF THE BLADES ON THE 4TH AND 5TH STAGES TO SEPARATE LEADING TO AN ENG SURGE AND LOSS OF POWER. THE ACCIDENT OCCURRED IN A FLT REGIME FROM WHICH THE PLT COULD NOT AFFECT A RECOVERY FROM THE ENG FAILURE.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB FTW85FA310
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 16-Jun-2023 12:36 | ASN Update Bot | Updated [[Time, Damage, Category, Investigating agency]] |
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