ASN Wikibase Occurrence # 168667
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| Date: | Monday 11 August 2014 |
| Time: | 20:00 |
| Type: |  MD Helicopters MD 500N |
| Owner/operator: | Private |
| Registration: | N18GH |
| MSN: | LN014 |
| Year of manufacture: | 1993 |
| Total airframe hrs: | 1902 hours |
| Engine model: | Rolls Royce 250-C20R |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | about 5 miles south of Idaho Falls -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Idaho Falls, ID |
| Idaho Falls, ID | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that he initiated a vertical climb in the helicopter to clear trees and a residential structure. When the helicopter was about 90 ft above ground level, it banked left and immediately began to rotate. The pilot made control inputs but was unable to regain control of the helicopter, so he initiated an autorotation. Subsequently, the helicopter impacted the ground and rolled over onto its right side. Postaccident examination of the airframe and flight control system revealed no evidence of any preexisting mechanical malfunction that would have precluded normal operation. Postaccident weight and balance and performance calculations revealed that, at the time of the accident, the helicopter was within weight and balance and performance limitations for an out-of-ground-effect hover.
Probable Cause: The pilot’s loss of helicopter control for reasons that could not be determined because postaccident examination of the helicopter did not reveal any mechanical malfunctions or failures that would have precluded normal operation.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Aug-2014 19:09 | Black Typhoon | Added |
| 14-Aug-2014 07:05 | Chieftain | Updated [Total occupants, Source] |
| 15-Aug-2014 12:27 | Chieftain | Updated [Operator, Destination airport] |
| 23-Aug-2014 15:48 | Aerossurance | Updated [Registration, Cn, Source, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 30-Nov-2017 19:00 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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