ASN Wikibase Occurrence # 299145
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| Date: | Saturday 8 April 2000 |
| Time: | 10:00 LT |
| Type: |  Hughes 369D |
| Owner/operator: | Haverfield Aviation |
| Registration: | N5070J |
| MSN: | 121096D |
| Year of manufacture: | 1981 |
| Total airframe hrs: | 1244 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | LEMONT, Illinois -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | , IL |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter impacted muddy terrain following an auto rotation while conducting power line maintenance. The autorotation was executed from a hover altitude of 100 feet agl. Review of the helicopter's height velocity diagram indicated that the operation was conducted within the "cross hatched" area. Operation within the "cross hatched" area may not allow enough time for the critical transition from powered flight to autorotation. Examination of the airframe, engine and related components revealed no anomalies.
Probable Cause: the loss of engine power for undetermined reasons. A factor was the operation within the cross "hatched area" of the helicopter's height/velocity curve by the company.
Accident investigation:
 |
|
Sources:
NTSB CHI00FA110
History of this aircraft
Other occurrences involving this aircraft
| 9 February 1999 | N5070J | Agrotors Inc. | 0 | Herminie, PA | |
sub |
| Collision with pole or wires | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Oct-2022 03:05 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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