ASN Wikibase Occurrence # 352931
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: | Tuesday 27 July 1999 |
| Time: | 17:30 LT |
| Type: |  Schweizer 269C |
| Owner/operator: | Silver Hawk Security, Inc. |
| Registration: | N88007 |
| MSN: | S1546 |
| Total airframe hrs: | 907 hours |
| Engine model: | Lycoming H10-360-D1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Jetmore, KS -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Hayes, KS (KHYS) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot said he was going to practice an auto rotation. He said he '...rolled the throttle back to idle position and dropped the collective...[and]noted a red light on the dash and could hear the engine had quit running.' He said the subsequent auto rotation '...terminated in a hard landing.' The on-scene investigation revealed flight and powerplant control operational continuity and fuel in the accident helicopter's fuel tanks. The engine was test run and its low idle was 1,300 rpm. According to a representative from a company that maintains and rebuilds helicopters like that of the accident helicopter, '...it is possible for an engine to die when a rapid roll-off of [the] throttle is accomplished and too low an idle RPM setting exists.' The FAA Approved Flight Manual said that the pilot should 'Split the needles by lowering the collective while maintaining throttle setting. The throttle correlation will establish a high idle RPM (approximately 2500 RPM) and will prevent the engine from loading up or stalling on recovery.'
Probable Cause: The pilot's use of improper procedures by not following the helicopter manufacturer's recommended engine RPM reduction procedures during autorotations. A factor was the pilot not attaining the proper rotor RPM during the autorotation practice.
Accident investigation:
 |
|
Sources:
NTSB CHI99LA257
History of this aircraft
Other occurrences involving this aircraft
| 8 April 1994 | N100LU | Michael Weatherl | 0 | Hebron, NE | |
sub |
| 14 July 1995 | N88007 | Silverhawk Security | 0 | Crete, NE | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Mar-2024 08:27 | 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