ASN Wikibase Occurrence # 74732
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| Date: | Tuesday 8 June 2010 |
| Time: | 14:27 |
| Type: |  Bell 47G-4A |
| Owner/operator: | Brantigan John W |
| Registration: | N7069J |
| MSN: | 7737 |
| Year of manufacture: | 1970 |
| Total airframe hrs: | 8806 hours |
| Engine model: | Lycoming VO-540-B1B3 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | off Shaw Island, WA -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Fowler Field, WA |
| Fowler Field, WA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that he and his wife, a helicopter pilot-rated passenger, departed to the north. The passenger stated that she noticed that the carburetor temperature gauge needle was in the yellow arc and asked the pilot if he would like her to add carburetor heat. The pilot said yes, and watched as she reached for the lever. The pilot did not see her move the lever because her hand was blocking his view. He looked away to monitor the helicopter, which was then climbing to clear the treetops. The pilot stated that about a minute later, as the helicopter reached the shoreline, the engine sputtered and quit. The pilot noticed that the mixture control had been pulled out about halfway, to idle cut-off. He lowered the collective and entered an autorotation, landing the float equipped helicopter on the water. The helicopter then nosed over upside-down and sustained substantial damage to the tail boom and cabin. The pilot reported that there were no mechanical failures or malfunctions with the airframe or engine prior to the accident. The mixture and carburetor heat controls are next to each other on the pedestal.
Probable Cause: The passenger's inadvertent movement of the mixture control during climb, resulting in a loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB
History of this aircraft
Other occurrences involving this aircraft
| 4 July 1983 | N7069J | Rowco, Inc. | 0 | Wheeler, IL | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Jun-2010 20:58 | cmlynn | Added |
| 30-Nov-2016 21:00 | Aerossurance | Updated [Time, Operator, Location, Departure airport, Source, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 26-Nov-2017 17:13 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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