ASN Wikibase Occurrence # 298554
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| Date: | Sunday 26 August 2001 |
| Time: | 14:30 LT |
| Type: |  Hughes 269B |
| Owner/operator: | Oakland Helicopters Inc. |
| Registration: | N9390F |
| MSN: | 74-00114 |
| Total airframe hrs: | 4938 hours |
| Engine model: | Lycoming HIO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Pontiac, Michigan -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Pontiac-Oakland County International Airport, MI (PTK/KPTK) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter impacted terrain during a simulated autorotation by the operator's pilot during training conducted by the operator's flight instructor. The helicopter experienced a total loss of engine power during the recovery from the autorotation. The aircraft checklist stipulates procedures to be used in checking engine idle speed to verify that it is in the range of 1,400-1,600 rpm. These checks, which are to be performed at the end of the last flight each day and prior to shutdown, were not being conducted by the operator. Inspection of the engine idle speed revealed it to be 700-800 rpm.
Probable Cause: the checklist not compiled with by the operator and not verified by the operator's pilot and the operator's flight instructor. An additional cause was the improper autorotation by the pilot in command. The out of calibration engine idle speed was a contributing factor.
Accident investigation:
 |
|
Sources:
NTSB CHI01LA293
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 19:22 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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