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ASN Wikibase Occurrence # 207208
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Type:Silhouette image of generic EXEC model; specific model in this crash may look slightly different
RotorWay Exec 90
Registration: N716JB
MSN: Exec-3000
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:Caldwell, ID -   United States of America
Phase: Unknown
Departure airport:Caldwell, ID (EUL)
Destination airport:Caldwell, ID (EUL)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Shortly after takeoff for the personal flight, about 15 to 20 ft above ground level, the experimental amateur-built helicopter suddenly yawed right, followed by a partial loss of engine power. The private pilot then performed a partial nose-up, collective-down maneuver, but due to the low altitude and not being able to maintain sufficient rotor rpm, he chose to land in soft dirt off the side of the runway; the helicopter landed hard.

The pilot had recently changed the alternator belt. A postaccident examination of the helicopter revealed that, during the maintenance, the pilot failed to properly tighten the tension bolts, which resulted in inadequate voltage to sustain ignition and the subsequent partial loss of engine power.

Probable Cause: The pilot's failure to properly tighten the tension bolts during the installation of the alternator belt, which resulted in inadequate voltage to sustain ignition and the subsequent partial loss of engine power.



Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 4 months
Download report: Final report
Other occurrences involving this aircraft

17 Dec 2017 N716JB Private 0 Caldwell, ID sub


Revision history:

08-Mar-2018 11:24 ASN Update Bot Added

Corrections or additions? ... Edit this accident description

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