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ASN Wikibase Occurrence # 190770
Last updated: 7 November 2019
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Date:21-JAN-1981
Time:09:04 PDT
Type:Silhouette image of generic R22 model; specific model in this crash may look slightly different
Robinson R-22
Owner/operator:Private
Registration: N9031Y
C/n / msn: 0078
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Long Beach-Daugherty Field, Long Beach, California -   United States of America
Phase: Landing
Nature:Training
Departure airport:Long Beach Airport, Long Beach, California (LGB/KLGB)
Destination airport:Long Beach-Daugherty Field, Long Beach, California (LGB/KLGB)
Narrative:
Substantially damaged January 21, 1981 whilst hovering at low level at Long Beach-Daugherty Field, Long Beach, California. Helicopter was engaged in a local training flight to and from Long Beach when the main rotor failed. No injuries sustained to the two persons on board (instructor and pilot under training). According to the official NTSB report "MAIN GEAR BOX INPUT FLEX COUPLING YOKE, PART NO. A194, FAILED.CRACKS FOUND UNDER CADMIUM PLATING, DECARBURIZED ZONE".

The NTSB report also indicates that the problem have resulted due to a fault in the manufacture of this particular helicopter "PRODUCTION-DESIGN-PERSONNEL: FATIGUE FRACTURE, SUBSTANDARD QUALITY CONTROL"

Sources:

1. NTSB Identification: LAX81FA038 at https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=27746&key=0&queryId=41a80e89-5376-4a08-95cd-b6777de5710c&pgno=2&pgsize=100
2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=9031Y
3. http://www.griffin-helicopters.co.uk/accidentdetails.aspx?accidentkey=1282
4. http://www.aviationdb.com/Aviation/Aircraft/9/N9031Y.shtm


Revision history:

Date/timeContributorUpdates
20-Oct-2016 14:07 Dr.John Smith Added
20-Oct-2016 14:10 Dr.John Smith Updated [Phase]
20-Oct-2016 14:11 Dr.John Smith Updated [Narrative]

Corrections or additions? ... Edit this accident description