ASN Wikibase Occurrence # 297557
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Monday 25 February 2002 |
| Time: | 14:30 LT |
| Type: |  RotorWay Exec 90 |
| Owner/operator: | Cobb International Inc. |
| Registration: | N9876D |
| MSN: | R15160 |
| Total airframe hrs: | 108 hours |
| Engine model: | Rotorway RI-162 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Phoenix, Arizona -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Chandler, AZ (P19) |
| Chandler, AZ (P19) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The experimental helicopter made a hard landing following a practice autorotation and loss of engine power. During the third practice autorotation, the student informed the instructor that he was unable to reintroduce power during the autorotation recovery. The instructor took control of the helicopter and attempted to roll the throttle up; however, he found it would not rotate any further. The instructor raised the collective at 10 feet agl in an attempt to cushion the landing. The helicopter hit the ground hard, the left skid collapsed, and the helicopter rolled onto its left side. Examination of the helicopter revealed the mechanical stop for the throttle was bent causing a condition in which the engine would stay at ground idle once the throttle was rolled past over center near the ground idle position. Once the linkage was driven over center, the linkage could not be moved by the throttle control A post accident run of the engine revealed no additional anomalies.
Probable Cause: The student's inadvertent over control of the throttle mechanism, which resulted in the bending of the throttle mechanical stop and binding the linkage in the idle position. Also causal was the CFI's inadequate supervision. A factor in the accident was the CFI's inability to add engine power due to the bent throttle mechanism during a practice autorotation.
Accident investigation:
 |
|
Sources:
NTSB LAX02LA096
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 05:40 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation