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ASN Wikibase Occurrence # 58912
Last updated: 25 June 2018
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Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206L-4 LongRanger IV
Owner/operator:Hillcrest Aircraft Co
Registration: N863H
C/n / msn: 52252
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Substantial
Location:near Moundridge, KS -   United States of America
Phase: Unknown
Departure airport:Ogallala, NE (OGA)
Destination airport:Newton, KS (EWK)
Investigating agency: NTSB
While en route to the destination airport, the helicopter impacted terrain in a relatively level attitude at high speed. A review of the helicopterís Sky Connect flight path showed fluctuations in altitude prior to the helicopterís impact with terrain. The pilot had severe obstructive sleep apnea known to the FAA and effectively treated it with routine use of a nasal continuous positive airway pressure (CPAP) device, which was found among the pilotís personal effects in the wreckage. It was not possible to determine whether the pilot had used the device in the days leading up to the accident. Also found among the pilotís personal effects was a container of nasal swabs marketed for the relief of congestion. It is possible (but could not be conclusively determined) that the pilot had nasal congestion that prevented him from using his CPAP in the day or days leading up to the accident, potentially resulting in severe fatigue on the day of the accident. An examination of the airframe and engine did not detect any anomalies prior to impact. An examination of the helicopter's annunciator panel did not reveal evidence that any lights were illuminated at the time of impact.
Probable Cause: Inflight collision with terrain for undetermined reasons.



Revision history:

09-Mar-2009 11:59 harro Updated
21-Dec-2016 19:25 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
01-Dec-2017 12:16 ASN Update Bot Updated [Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative]

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