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ASN Wikibase Occurrence # 31147
Last updated: 23 July 2020
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Type:Silhouette image of generic UH1 model; specific model in this crash may look slightly different
Bell UH-1H
Registration: N23Y
C/n / msn: 4243
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Leadville, Colorado -   United States of America
Phase: Landing
Departure airport:Leadville, CO
Destination airport:Leadville, CO
Investigating agency: NTSB
The helicopter crew was conducting high altitude flight tests pursuant to obtaining two Supplemental Type Certificates. From an altitude of 200 feet, and at 8,000 pounds gross weight, the pilot initiated an intentional autorotation at 42 knots with a one second delay before lowering the collective control. The pilot said he was unable to arrest the descent rate as the helicopter approached the runway at 40 knots.

The helicopter was destroyed when it impacted the runway. A video camera was used to record the flight tests. A review of the tape disclosed that on at least two previous autorotations, the tail boom stinger struck the ground first. According to an FAA helicopter operations inspector, this was indicative that the pilot was 'outside the low end of the height-velocity curve.'

He said that 'either there was insufficient airspeed for the altitude used, or there was insufficient altitude for the airspeed used


Revision history:

27-Sep-2008 01:00 ASN archive Added
31-Oct-2011 09:49 Dr. John Smith Updated [Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative]

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