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ASN Wikibase Occurrence # 40602
Last updated: 15 September 2021
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Type:Silhouette image of generic BK17 model; specific model in this crash may look slightly different
MBB BK 117B-1
Owner/operator:Keystone Helicopter Corp.
Registration: N891GM
MSN: 7153
Fatalities:Fatalities: 4 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:North Mountain, Sonestown, PA -   United States of America
Phase: En route
Departure airport:Danville, PA
Destination airport:Sayre, PA
Investigating agency: NTSB
Flew into mountainous terrain in dark night and snowfall. Aircraft 2 miles off route. Returning to base after dropping off patient.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows: THE PILOT'S INADEQUATE PREFLIGHT PLANNING TO ASSURE THAT THE INTENDED COURSE AND ALTITUDE PROVIDED ADEQUATE TERRAIN CLEARANCE.



Revision history:

24-Oct-2008 10:30 ASN archive Added
07-Feb-2009 10:13 harro Updated
24-Jul-2010 12:37 Alpine Flight Updated [Aircraft type, Other fatalities, Source]
19-Aug-2010 13:54 TB Updated [Aircraft type, Operator]
20-Nov-2012 04:12 TB Updated [Time, Operator, Source, Narrative]
24-Apr-2016 20:11 Aerossurance Updated [Location, Source, Narrative]
21-Dec-2016 19:23 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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