ASN Wikibase Occurrence # 362049
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Monday 17 May 1993 |
| Time: | 15:15 LT |
| Type: |  Fairchild FH-1100 |
| Owner/operator: | Sea Hawk, Inc. |
| Registration: | N5060F |
| MSN: | 242 |
| Total airframe hrs: | 2759 hours |
| Engine model: | Allison 250-C18 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Malina Bay, AK -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Kodiak, AK (KDK) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
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.
Accident investigation:
 |
|
Sources:
NTSB ANC93FA064
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Mar-2024 17:10 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation