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ASN Wikibase Occurrence # 32273
Last updated: 7 September 2020
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Date:22-APR-1995
Time:09:50 PDT
Type:Silhouette image of generic UH1 model; specific model in this crash may look slightly different
Bell UH-1B
Owner/operator:Blue Mountain Helicopters
Registration: N39SD
C/n / msn: 924
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Walla Walla, Western Australia -   Australia
Phase: Landing
Nature:External load operation
Departure airport:Walla Walla, WA
Destination airport:
Narrative:
THE PILOT STATED THAT DURING AN EXTERNAL LOAD OPERATION, JUST AFTER THE LOAD CLEARED THE GROUND THE HELICOPTER SHUTTERED AND MADE A LOUD SCRAPING NOISE FOLLOWED BY LOW ROTOR RPM. THE PILOT RELEASED THE LOAD AND MANEUVERED FOR AN EMERGENCY LANDING.

DURING THE MANEUVER, THE HELICOPTER COLLIDED WITH TREES. DURING THE POST CRASH INSPECTION, IT WAS FOUND THAT THE FREEWHEELING ONE-WAY CLUTCH ASSEMBLY HAD FAILED IN FLIGHT. THE CLUTCH ASSEMBLY APPEARED TO BE WORN AND THE INNER CLUTCH RACE DISPLAYED SIGNS OF BRINELLING.

Originally built for US ARMY AS 63-8699: Rebuilt/repaired after crash on 22 April 1995. US registration N39SD cancelled by FAA Nov 21, 2007 on sale to owner in Australia, Registered Dec 18, 2007 to Aircraft Technicians of Australia P/L as VH-DHY

Sources:

http://dms.ntsb.gov/aviation/AccidentReports/0x4wuyqyu3ebzdnszguwylb21/L11052011120000.pdf
http://www.griffin-helicopters.co.uk/accidentdetails.aspx?accidentkey=37633
http://www.joebaugher.com/usaf_serials/1963.html


Revision history:

Date/timeContributorUpdates
27-Sep-2008 01:00 ASN archive Added
05-Nov-2011 16:18 Dr. John Smith Updated [Time, Cn, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Source, Damage, Narrative]

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