ASN Wikibase Occurrence # 361317
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| Date: | Sunday 12 September 1993 |
| Time: | 10:00 LT |
| Type: |  Sikorsky CH-54A Tarhe |
| Owner/operator: | Chet Rasberry, Inc. |
| Registration: | N44094 |
| MSN: | 421 |
| Total airframe hrs: | 3180 hours |
| Engine model: | P&W T73-P1 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Anita Bay, AK -
 United States of America
|
| Phase: | Taxi |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER EXPERIENCED A #2 ENGINE FAILURE DURING A HOVER FOR LANDING WITH AN EXTERNAL LOAD. EXAMINATION OF THE ENGINE SHOWED THAT THE POWER TURBINE DISC REMAINED INTACT. HOWEVER, ALL THE TURBINE BLADES WERE BENT, BROKEN, OR MISSING THE ENGINE CASE WAS SEVERED IN TWO PARTS IMMEDIATELY ADJACENT TO THE PLANE OF ROTATION OF THE POWER TURBINE. THE MANUFACTURER'S TBO WAS 1800 HRS. THE COMPANY HAD A MILITARY TBO EXTENSION, APPROVED BY THE FAA, TO 2100 HRS. THE ENGINE HAD A TOTAL TIME OF 2058 HRS AT THE TIME OF THE FAILURE.
Probable Cause: THE SEPARATION OF THE TURBINE BLADE FROM THE POWER TURBINE DISC.
Accident investigation:
 |
|
Sources:
NTSB ANC93IA176
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 17:08 | ASN Update Bot | Added |
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