ASN Wikibase Occurrence # 89884
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| Date: | Friday 4 February 2011 |
| Time: | 14:22 |
| Type: |  McDonnell Douglas MD 500E (369E) |
| Owner/operator: | Wilson Construction Company |
| Registration: | N416WC |
| MSN: | 0268E |
| Year of manufacture: | 1988 |
| Total airframe hrs: | 6256 hours |
| Engine model: | Rolls-Royce Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | field in Rio Linda, Sacramento, CA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Unknown |
| Departure airport: | Elverta, CA |
| Elverta, CA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A lineman was on the skid of the helicopter installing high-power electrical lines on a power line structure. The pilot positioned the helicopter about 30 to 50 feet from the structure. The main rotor blades made contact with an installation rope, which then wrapped around the mast as the blades pulled it in. The pilot lost control of the helicopter, and it began an uncontrolled descent to the ground. A postaccident examination of the airframe and engine revealed no mechanical anomalies that would have precluded normal operation. It is likely that the pilot misjudged the distance between the rotor blades and the installation rope.
Probable Cause: The pilot did not maintain rotor blade clearance from an installation rope while maneuvering to install power lines.
Accident investigation:
 |
|
Sources:
NTSB
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Feb-2011 13:23 | Fusko | Added |
| 05-Feb-2011 13:24 | harro | Updated [Time, Location, Embed code, Narrative] |
| 08-Feb-2011 12:22 | bizjets101 | Updated [Registration, Cn, Phase, Source, Embed code, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 16:43 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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