ASN Wikibase Occurrence # 237654
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: | Friday 3 July 2020 |
| Time: | 18:37 LT |
| Type: |  Enstrom 280FX Shark |
| Owner/operator: | Pilot |
| Registration: | N282SH |
| MSN: | 2105 |
| Year of manufacture: | 2005 |
| Total airframe hrs: | 662 hours |
| Engine model: | Lycoming HIO-360-F1AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | near Des Moines Municipal Airport (DSM/KDSM), IA -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Burlington-Southeast Iowa Regional Airport, IA (BRL/KBRL) |
| Des Moines International Airport, IA (DSM/KDSM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot of the personal flight stated that during a final approach for landing, the engine and rotor speeds decreased below the green arcs on their respective instruments, and the low-speed alarm sounded. The rotor speed and engine speed remained in synchronization and decreased at the same rate. The pilot stated he added throttle but neither the rotor speed nor the engine speed increased. He thought that the helicopter lost engine power and performed an autorotation, lowering the collective and initially pushing forward on the cyclic. The pilot stated he did not perform the autorotation perfectly and the outcome would have been better with a better execution of the autorotation. The proper entry into the autorotation utilizes aft cyclic inputs.
Postaccident examination of the helicopter confirmed flight control continuity. A postaccident engine run excluded the turbocharger system and used engine settings that were different than those of the original engine, which was insufficient to validate normal and original engine operation. The turbocharged engine was a supplemental type certificate installation, and those parameters were not provided and are unknown.
Probable Cause: The partial loss of rotor and engine speed during approach for landing, which resulted in an autorotation and impact with terrain. The reason for the partial loss of rotor and engine speed could not be determined based on the available evidence. Contributing to the accident was the pilot's improper execution of the autorotation.
Accident investigation:
 |
|
Sources:
NTSB CEN20LA261
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Jul-2020 05:42 | gerard57 | Added |
| 04-Jul-2020 10:26 | Aerossurance | Updated [Location, Destination airport, Narrative] |
| 04-Jul-2020 11:49 | Anon. | Updated [Aircraft type, Source] |
| 04-Jul-2020 11:51 | harro | Updated [Aircraft type, Registration, Cn, Departure airport, Destination airport, Source] |
| 04-Jul-2020 14:00 | RobertMB | Updated [Operator, Location, Source, Narrative] |
| 07-Jul-2020 16:10 | Captain Adam | Updated [Phase, Narrative] |
| 08-Jul-2020 03:09 | RobertMB | Updated [Source, Narrative] |
| 01-Jul-2022 09:07 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Destination airport, Source, Narrative, Category, Accident report] |
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