ASN Wikibase Occurrence # 42602
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| Date: | Tuesday 29 October 1996 |
| Time: | 17:47 LT |
| Type: |  Bell 47G-3B-1 |
| Owner/operator: | Usfs |
| Registration: | N3098G |
| MSN: | 3378 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 6473 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fillmore, UT -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter pilot had completed about 20 seeding runs, and had landed at the same landing zone. The landing was describe as the same as the previous landings, in that the bucket touched down on the ground, then the pilot maneuvered the helicopter backwards and touched down with the bucket in front of his position. Witnesses reported that after the 2 ground crew members filled the seed bucket, both moved away to avoid the rotor wash; one went behind a rock, while the other moved near the seed bags and turned his back toward the helicopter. As the helicopter lifted off from the landing zone, one of three 40-foot long lines (attached to the seed bucket) looped over the right skid. The helicopter continued to gain altitude as the seed bucket began to tip and drop seed. Witnesses (about 50 yards downhill from the landing zone) reported that the pilot appeared to be having trouble controlling the helicopter as it gained altitude and moved forward. The helicopter continued into rising terrain and collided with a 45 degree slope in a nose down attitude and slightly to the right side. Inspection of the helicopter after the accident revealed that the pilot had jettisoned the load and the hook had released at the belly of the helicopter before collision with the terrain; however, the line remained entangled around the right skid.
Probable Cause: inadequate procedure and inadequate monitoring by the pilot, the operator, and/or other personnel, which allowed one of three external cables to the seed bucket to become entangled with the right skid of the helicopter, resulting in an imbalance and loss of aircraft control as weight on the cable became effective. Lack of air/ground communication between the pilot and ground crew personnel was a related factor.
Accident investigation:
 |
|
Sources:
NTSB SEA97TA023
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] |
| 01-May-2022 08:31 | Ron Averes | Updated [Operator] |
| 12-Nov-2022 02:46 | Ron Averes | Updated [Operator, Nature] |
| 29-May-2023 22:07 | Ron Averes | Updated [[Operator, Nature]] |
| 08-Apr-2024 18:15 | ASN Update Bot | Updated [Time, Aircraft type, Operator, Other fatalities, Phase, Nature, Source, Narrative, Category, Accident report] |
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