FLUSHING, NY, USA
N26210
NORD AVIATION 262A-12
WHILE CLIMBING THROUGH 7000 FT, THE AIRCRAFT BEGAN TO SHAKE VIOLENTLY. THE FIRST OFFICER CONFIRMED THAT THE SOURCE OF VIBRATION WAS THE RIGHT ENGINE. AN UNSUCCESSFUL ATTEMPT WAS MADE TO FEATHER THE PROP AFTER THE RT ENGINE WAS SHUT DOWN. THE AIRCRAFT CONTINUED TO VIBRATE SO THE CREW DECLARED AN EMERGENCY AND LANDED AT LAGUARDIA AIRPORT. THE NO. 2 PROP BLADE ON THE RT PROP HAD FAILED IN FATIGUE AND SEPARATED ABOUT 14 INCHES OUTBOARD OF THE HUB. THE FATIGUE CRACK INITIATED FROM AN AREA OF PITTING CORROSION THAT WAS COVERED BY THE ELECTRICAL DEICING BOOT. EXAMINATION OF THE BOOT AT THE FATIGUE ORIGIN OF THE BLADE DISCLOSED LOCALIZED OVERHEATING HAD OCCURRED WHICH DETERIORATED THE BOOT. THIS WAS IN THE AREA WHERE THE HEATING ELEMENT JOINS A BRAIDED WIRE BUNDLE. TOTAL TIME ON THE PROP WAS 1435 HOURS.
Source: NTSB Aviation Accident Database
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