ASN Wikibase Occurrence # 369441
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Date: | Monday 5 December 1988 |
Time: | 16:06 LT |
Type: | MBB Bo 105S |
Owner/operator: | Air Logistics |
Registration: | N2785B |
MSN: | S-636 |
Total airframe hrs: | 1751 hours |
Engine model: | Allison 250-C20B |
Fatalities: | Fatalities: 0 / Occupants: 4 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | South Marsh 113, -
United States of America
|
Phase: | En route |
Nature: | Unknown |
Departure airport: | South Marsh 7, GM |
Destination airport: | Patterson, LA (KPTN) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:AS THE HELICOPTER WAS CLIMBING THRU ABOUT 500 FT, THE PLT HEARD A LOUD NOISE, FELT A SEVERE VIBRATION & SAW DEBRIS FALLING IN FRONT OF THE ACFT. HE BEGAN AN AUTOROTATION & DEPLOYED THE EMERGENCY FLOATS BEFORE LANDING ON WATER IN THE GULF OF MEXICO. THE HELICOPTER REMAINED AFLOAT & THE OCCUPANTS DEPLOYED & ENTERED A RAFT FROM WHICH THEY WERE PICKED UP ABOUT 1 HR LATER. AN INVESTIGATION REVEALED THAT ONE OF THE TAIL ROTOR BLADES HAD SEPARATED & STRUCK A MAIN ROTOR BLADE. THE RESULTING IMBALANCE CAUSED THE GEARBOX TO SEPARATE & FALL IN THE WATER. THE 90 DEG GEARBOX, TAIL ROTOR HUB AND TAIL ROTOR BLADES WERE NOT RECOVERED FROM THE GULF OF MEXICO.
Probable Cause: FAILURE AND SEPARATION OF ONE OF THE TAIL ROTOR BLADES FOR UNDETERMINED REASONS. THR RESULTING IMBALANCE AND VIBRATION CAUSED THE SEPARATION OF THE 90 DEGREE GEARBOX AND A PORTION OF THE VERTICAL PYLON WHICH NECESSITATED THE EMERGENCY AUTOROTATION TO THE WATER.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | FTW89LA031 |
Status: | Investigation completed |
Duration: | 1 year 1 month |
Download report: | Final report |
|
Sources:
NTSB FTW89LA031
History of this aircraft
Other occurrences involving this aircraft
7 May 1989 |
N2785B |
Air Logistics LLC |
1 |
West Cameron Blk, LA |
|
w/o |
Revision history:
Date/time | Contributor | Updates |
24-Mar-2024 14:37 |
ASN Update Bot |
Added |
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