Fairchild FH-1100 N5060F
17 May 1993 · Malina Bay, Alaska, United States · Serious injuries
Summary
On 17 May 1993 at about 22:15 local time, a Fairchild FH-1100 registered N5060F, operated by Sea Hawk, Inc., was involved in an accident near Malina Bay, Alaska, United States. 4 people were on board and 2 were seriously injured, 2 had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 22:15
- Classification
- Accident
- Location
- Malina Bay, Alaska, United States
- Coordinates
- 57.7899, -152.4004
- Aircraft
- Fairchild FH-1100
- Registration
- N5060F
- Category
- Helicopter
- Engines
- 1
- Operator
- Sea Hawk, Inc.
- Operating rule
- Part 135: Air Taxi & Commuter
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Kodiak → Unknown
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- ANC93FA064
People
2 people were seriously injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 4 | 0 | 2 | 2 | 0 |
Probable cause
THE INSTALLATION OF A BOGUS TRANSMISSION TO ENGINE DRIVESHAFT. THE FAILURE OF THE COMPANY MAINTENANCE PERSONNEL TO COMPLY WITH THE SERVICE BULLETINS AND LETTERS WAS A FACTOR.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
EXAMINATION OF THE HELICOPTER SHOWED THAT THE ENGINE TO TRANSMISSION DRIVE SHAFT, ENGINE SIDE COUPLING FAILED. METALLURGICAL ANALYSIS SHOWED FATIGUE FRACTURE SURFACES BUT DUE TO THE ROTATIONAL DAMAGE, THE ORIGIN OF THE FRACTURE COULD NOT BE DETERMINED. THE EXAMINATION ALSO SHOWED MANY STAMPED NUMBERS PEENED OVER WITH A DIFFERENT NUMBER. HOWEVER, THE BENDIX DATA PLATE WAS STILL AFFIXED TO THE SHAFT AND SHOWED THE PART NUMBER 19E49-3E. EXAMINATION OF THE HELICOPTER RECORDS SHOWED THAT A DIFFERENT SERIAL NUMBERED SHAFT WAS SUPPOSED TO BE INSTALLED. ACCORDING TO THE SERVICE RECORD OF THE SHAFT ACTUALLY INSTALLED, IT DID NOT SEE ANY SERVICE FROM JULY, 1978 TO MARCH, 1992. DOCUMENTATION WAS NOT FOUND SHOWING THE DRIVE SHAFT HAD BEEN MAINTAINED IN ACCORDANCE WITH APPLICABLE SERVICE LETTERS AND BULLETINS.
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 | - |