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ASN Wikibase Occurrence # 135284
 
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Date:19-OCT-2002
Time:11:50
Type:Silhouette image of generic EXEC model; specific model in this crash may look slightly different
RotorWay Exec 162F
Owner/operator:Private
Registration: N162AZ
MSN: 6398
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Tucson, AZ -   United States of America
Phase: En route
Nature:Private
Departure airport:Tucson, AZ (KRYN)
Destination airport:Tucson, AZ (KRYN)
Investigating agency: NTSB
Narrative:
Following a drive shaft failure, the helicopter collided with high vegetation and rolled over during an autorotation. In a statement to a Federal Aviation Administration (FAA) inspector, the pilot reported that while performing pattern and ground reference maneuvers, the helicopter experienced a mechanical malfunction. The pilot executed an autorotation and contacted high vegetation with the helicopter's right skid, resulting in the helicopter rolling to the left and impacting terrain. The pilot disposed of the helicopter in a waste dump prior to examination by FAA inspectors and the nature of the mechanical malfunction could not be determined. In a telephone interview with a Safety Board investigator, the pilot reported that the secondary shaft broke in half, resulting in a loss of drive power to the helicopter's main rotor. The pilot was aware of the advisory service bulletin issued by the kit manufacturer suggesting replacement of the secondary shaft assembly, but had not complied. Beginning in May 1995, the kit manufacturer released four separate Advisory Bulletins (A-23, A-26, A-32 and A-34) addressing installation, inspection, and shaft design change issues. Citing a history of secondary shaft failures, the most recent advisory bulletin at the time of the accident, issued May 2002, recommended replacement of the standard 30 mm secondary shaft with an upgraded 35 mm shaft.
Probable Cause: the failure of the secondary drive shaft.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20021023X05371&key=1

Location


Revision history:

Date/timeContributorUpdates
21-Dec-2016 19:26 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
09-Dec-2017 17:55 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

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