ASN Wikibase Occurrence # 361117
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: | Friday 29 October 1993 |
| Time: | 12:40 LT |
| Type: |  Bell 206L |
| Owner/operator: | Island Helicopters |
| Registration: | N16696 |
| MSN: | 45101 |
| Total airframe hrs: | 20432 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 6 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | New York, NY -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER WAS ON A LOCAL SIGHTSEEING FLIGHT AND OVER THE EAST RIVER IN NEW YORK CITY WHEN THERE WAS A LOSS OF ENGINE POWER. THE PILOT DEPLOYED THE EMERGENCY FLOATS, INITIATED AN AUTOROTATION AND LANDED ON THE RIVER. EXAMINATION OF THE ENGINE FOUND AN 'O' RING WAS IN AN IMPROPER POSITION ON THE TURBINE SPLINED ADAPTER WHICH CONNECTS THE TURBINE AND COMPRESSOR SECTIONS OF THE ENGINE. IN ADDITION, THE SPLINED END WAS DRY OF LUBRICATION AND WORN TO THE POINT OF DISENGAGEMENT BETWEEN THE COMPRESSOR AND TURBINE. ACCORDING TO THE FAA, DURING ENGINE ASSEMBLY, THE 'O' RING IS INSTALLED AND CHECKED TO SEE THAT IT IS IN THE PROPER POSITION, THEN THE ENGINE HALVES ARE ASSEMBLED. DURING THE ASSEMBLY, WHEN THE 'O' RING IS NO LONGER VISIBLE IT COULD BE ROLLED OUT OF POSITION OR DAMAGED. THIS COULD PREVENT LUBRICATION FROM REACHING THE SPLINED END.
Probable Cause: Inadequate maintenance which resulted in the improper alignment of the 'O' ring on the spur adapter gear drive which caused lack of lubrication and wear of the gear drive and the disengagement of the compressor and turbine.
Accident investigation:
 |
|
Sources:
NTSB NYC94IA023
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 14:59 | 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