RICHEY, MT, USA
N6589
GRUMMAN G-164A
THE PLT HAD FINISHED SPRAYING & WAS PROCEEDING TO THE GLENDIVE ARPT. HE SAID THAT ENG OR PROP BEGAN A SUDDEN SEVERE VIBRATION WHICH REQUIRED THE ENG TO BE SHUT DOWN. AN EMEGENCY LANDING WAS MADE. THE PLT STATED THAT THE LEFT WING IMPACTED A HILL WHICH SPUN THE ACFT TO THE LEFT. SUBSEQUENTLY, THE RIGHT MAIN GEAR, TAILWHEEL & THE UPPER & LOWER RIGHT WINGS FAILED. A POST IMPACT FIRE DESTROYED THE ACFT. AN EXAM REVEALED THAT THE OUTER 13 INCHES OF 1 PROP BLADE, P/N 6101A-13, HAD FAILED. ALSO, THE ENG MOUNTING & SEVERAL MOUNTS WERE FOUND BROKEN. RECORDS INDICATED THE HAMILTON STANDARD (PROP HUB 2-D-30-237) HAD BEEN OVERHAULED & TWISTED BLADES HAD BEEN STRAIGHTENED IN 1977. TOTAL TIME ON THE PROP SINCE OVERHAUL WAS 1168 HRS.
Source: NTSB Aviation Accident Database
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