NTSB Identification: ANC92LA078.
The docket is stored on NTSB microfiche number 50058.
Nonscheduled 14 CFR
Accident occurred Sunday, May 24, 1992 in KAHILTNA GLACIE, AK
Probable Cause Approval Date: 08/30/1993
Aircraft: CESSNA 185, registration: N124KT
Injuries: 4 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

DURING A TAKEOFF RUN ON THE KAHILTNA GLACIER THE LEFT WHEEL SKI PIVOT SHAFT FRACTURED AND FAILED CAUSING THE RIGHT WING TO DRAG ON THE SNOW. EXAMINATION OF THE PIVOT SHAFT SHOWED THAT THE METAL WAS 4300 SERIES STEEL, THE TWO KEYWAYS WERE MACHINED DIFFERENTLY, AND THE RADIUS ON THE CIRCUMFERENTIAL STEP WAS IRREGULAR. THESE AREAS DID NOT MEET THE SPECIFICATIONS SET FORTH IN THE MANUFACTURER'S BLUEPRINTS.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE FRACTURE OF THE LANDING GEAR WHEEL SKI PIVOT SHAFT DUE TO IMPROPER MANUFACTURE.

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