ASN Wikibase Occurrence # 40602
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| Date: | Saturday 26 January 1991 |
| Time: | 19:48 |
| Type: |  MBB BK 117B-1 |
| Owner/operator: | Keystone Helicopter Corp. |
| Registration: | N891GM |
| MSN: | 7153 |
| Engine model: | LYCOMING LTS101-650B-1 |
| Fatalities: | Fatalities: 4 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | North Mountain, Sonestown, PA -
 United States of America
|
| Phase: | En route |
| Nature: | Ambulance |
| Departure airport: | Danville, PA |
| Sayre, PA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
Sources:
WAAS
http://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001212X16367&key=1
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 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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