ASN Wikibase Occurrence # 36012
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| Date: | Friday 21 June 1996 |
| Time: | 07:50 LT |
| Type: |  MBB Bo 105CBS-2 |
| Owner/operator: | Air Logistics Inc. |
| Registration: | N2906T |
| MSN: | S-573 |
| Year of manufacture: | 1982 |
| Total airframe hrs: | 10596 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 4 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | 70 mi S Sabine Pass, TX -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | , TX (95XS) |
| High Island 553, GM | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The twin engine helicopter was en route to an oil platform located 90 miles south of Sabine Pass, Texas, in the Gulf of Mexico. The pilot called company dispatch and reported off Sabine at 0711 with 2.5 hours of fuel on board. The company's flight following radio log shows that the pilot made a normal position report at 0729 and reported that he was 67 miles from destination. The pilot transmitted another normal position report at 0744 and reported that he was 38 miles from destination. No other radio transmissions were received from the aircraft. According to the chief pilot, the altitude at which the helicopter would have been cruising at would most likely have been between 500 and 1,000 feet AGL. No abnormalities were discovered with the engines during detailed examinations. Tear down of the main transmission revealed that the sun gear had failed, thus resulting in the main rotor system not being driven. Structural deformations of the airframe revealed that the helicopter impacted the water vertically in a high rate of descent.
Probable Cause: The failure of the sun gear within the main transmission resulting in the main rotor system not being driven.
Accident investigation:
 |
|
Sources:
NTSB FTW96FA265
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 27-Oct-2012 08:29 | TB | Updated [Time, Aircraft type, Location, Source, Narrative] |
| 01-May-2016 14:19 | Aerossurance | Updated [Time, Aircraft type, Location, Nature, Departure airport, Destination airport, Source, Narrative] |
| 08-Oct-2016 20:36 | TB | Updated [Time, Aircraft type, Location, Narrative] |
| 21-Dec-2016 19:22 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 06:08 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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