Sikorsky C54A N44094
12 September 1993 · Anita Bay, Alaska, United States · No injuries
Summary
On 12 September 1993 at about 17:00 local time, a Sikorsky C54A registered N44094, operated by Chet Rasberry, Inc., was involved in an incident near Anita Bay, Alaska, United States. 2 people were on board and nobody was injured. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 17:00
- Classification
- Incident
- Location
- Anita Bay, Alaska, United States
- Coordinates
- 55.6100, -131.5809
- Aircraft
- Sikorsky C54A
- Registration
- N44094
- Category
- Helicopter
- Engines
- 1
- Operator
- Chet Rasberry, Inc.
- Operating rule
- Part 133: Rotorcraft Ext. Load
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Day
- NTSB number
- ANC93IA176
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 0 | 2 |
Probable cause
THE SEPARATION OF THE TURBINE BLADE FROM THE POWER TURBINE DISC.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
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.
Quoted verbatim from the NTSB record.
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 21 Jul 1993 | Cessna A185F | Denali Nat'l Pk, Alaska, United States | James Okonek | Serious injuries | - |
| 4 Aug 1993 | Piper PA-32R-300 | Atigun Pass, Alaska, United States | Yutana Airlines | Fatal | 1 |
| 19 Aug 1993 | De Havilland DHC-3 | Nikabuna Lake, Alaska, United States | Ketchum Air Service Inc. | Minor injuries | - |
| 31 Aug 1993 | De Havilland DHC-2 | Iliamna, Alaska, United States | Rainbow King, Inc | Fatal | 3 |
| 2 Sep 1993 | Piper PA-18A-150 | Sanona Creek, Alaska, United States | Garfield, Wade E. | Fatal | 2 |
| 8 Sep 1993 | Interstate S-1B2 ARCTIC TERN | Talkeetna River, Alaska, United States | Franklin, Gary L. | Serious injuries | - |