ASN Wikibase Occurrence # 43289
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| Date: | Wednesday 12 August 1992 |
| Time: | 17:10 LT |
| Type: |  Hughes 369D |
| Owner/operator: | Colorado Helicopters, Inc. |
| Registration: | N58425 |
| MSN: | 1090 591 D |
| Year of manufacture: | 1979 |
| Engine model: | ALLISON 250-C20B |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Maxwell, CA -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER COLLIDED WITH A POWERLINE TRANSMISSION TOWER WHILE TOWING CABLE ATTACHED BY MEANS OF A CARGO HOOK. THE HELICOPTER WAS MOVING LATERALLY TOWARD THE TOWER WHEN IT HIT THE TOWER WITH THE M/R BLADES. THE BLADE TIP WEIGHT SEPARATED AND PENETRATED THE TAIL BOOM IN TWO PLACES, DAMAGING THE T/R DRIVE SHAFT. THE HELICOPTER SPUN TWICE TO THE RIGHT IN A SLOW DESCENT TETHERED BY THE STEEL CABLE. DURING THE SECOND TURN, PARTS OF THE T/R SEPARATED. WITNESSES DID NOT OBSERVE THE CABLE BEING JETTISONED. THE PILOT WAS NEWLY HIRED, AND DID NOT HAVE ANY PRIOR CLASS C EXTERNAL LOAD EXPERIENCE. HE HAD RECEIVED TRAINING BY THE COMPANY CHIEF PILOT, WHO THEN LEFT THE COMPANY 3 DAYS AFTER THE PILOT WAS HIRED, LEAVING THE PILOT TO WORK ALONE. THE FAA OFFICE HOLDING THE OPERATOR'S CERTIFICATE HAD BEEN NOTIFIED OF THE CHIEF PILOT'S DEPARTURE. THE OFFICE DID NOT, NOR WAS IT REQUIRED TO, NOTIFY THE LOCAL FAA DISTRICT OFFICE OF THE OPERATOR'S EXTERNAL LOAD OPERATIONS WITHIN THAT OFFICE'S GEOGRAPHIC RESPONSIBILITY.
Probable Cause: THE FAILURE OF THE PILOT TO MAINTAIN AN ADEQUATE VISUAL OUTLOOK, AND FAILURE OF THE COMPANY TO PROVIDE ADEQUATE TRAINING. CONTRIBUTING TO THE ACCIDENT WAS: INADEQUATE COMPANY SUPERVISION DURING THE OPERATION, AND INADEQUATE SURVEILLANCE BY THE FAA WHICH FAILED TO DETECT THE INADEQUATE TRAINING OF THE PILOT.
Accident investigation:
 |
|
Sources:
NTSB LAX92GA347
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 18:42 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Source, Narrative, Category, Accident report] |
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