ASN Wikibase Occurrence # 378428
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Date: | Monday 17 September 1984 |
Time: | 10:35 LT |
Type: | Aerospatiale SA 315B Lama |
Owner/operator: | Hosking Helicopters, Inc. |
Registration: | N49532 |
MSN: | 2500 |
Total airframe hrs: | 4165 hours |
Engine model: | Turbomeca ARTOUSTE IIIB |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Mountain View, WY -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Unknown |
Departure airport: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE HELICOPTER EXPERIENCED A LOSS OF POWER DURING AN EXTERNAL LOAD OPERATION. THE PLT RELEASED THE LOAD AND PERFORMED AN AUTOROTATION. A HARD LANDING RESULTED DURING WHICH THE TAIL BOOM WAS SEVERED BY THE MAIN ROTOR BLADES. METALLURGICAL EXAMINATION OF THE ENGINE COMPRESSOR SECTION REVEALED THE REAR 1/3 OF THE #3 COMPRESSOR BLADE SEPARATED FROM THE ASS'Y BY A TRANSVERSE FRACTURE THROUGH THE PLATFORM AND AIRFOIL. THE #5 ATTACHMENT PIN SEPARATED APRX 1/4 INCH FROM ITS AFT SURFACE. THE FRACTURE OCCURRED DUE TO A COMBINATION OF STRESS CORROSION CRACKING, FATIGUE PROGRESSION AND BENDING OVERSTRESS.
Probable Cause:
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | DEN84LA292 |
Status: | Investigation completed |
Duration: | |
Download report: | Final report |
|
Sources:
NTSB DEN84LA292
History of this aircraft
Other occurrences involving this aircraft
2 July 1982 |
N49532 |
Hosking Exploration Helicopter |
0 |
Big Piney, WY |
|
sub |
7 August 1983 |
N49532 |
Hosking Helicopters |
0 |
Montpelier, ID |
|
sub |
12 May 1991 |
C-GLAY |
Liftair International |
0 |
40 km from Geladin |
|
sub |
Location
Revision history:
Date/time | Contributor | Updates |
31-Mar-2024 08:36 |
ASN Update Bot |
Added |
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