Accident Nord 262A N29816, Sunday 20 October 1991

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Date:	Sunday 20 October 1991
Time:	01:15 LT
Type:	Nord 262A
Owner/operator:	Richmor Aviation Inc
Registration:	N29816
MSN:	101
Total airframe hrs:	13917 hours
Engine model:	P&W PT6-45
Fatalities:	Fatalities: 0 / Occupants: 3
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Albany, NY - United States of America
Phase:	Initial climb
Nature:	Ferry/positioning
Departure airport:
Destination airport:	Hudson, NY (1B1)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
A PROPELLER BLADE FAILED DURING TAKEOFF AND ENTERED THE FUSELAGE. THE CREW ABORTED THE TAKEOFF SUCCESSFULLY. METALLURGICAL EXAMINATION REVEALED THAT THE BLADE FAILED AS A RESULT OF 'MULTIPLE FATIGUE CRACK ORIGINS (WHICH) HAD EMANATED FROM CORROSION PITS ON THE BLADE BORE SURFACE.' THE BLADE BORE WAS SUPPOSED TO BE COATED WITH A CHROMATE CONVERSION TO INHIBIT CORROSION. ENERGY DISPERSIVE X-RAY SPECTROGRAPH (EDS) REVEALED NO EVIDENCE THAT THE CHROMATE CONVERSION COATING HAD BEEN ACCOMPLISHED.

Probable Cause: INADEQUATE QUALITY CONTROL DURING MAINTENANCE OR MANUFACTURING BY FAILING TO USE CORROSION INHIBITER, WHICH RESULTED IN CORROSION, FATIGUE, AND SUBSEQUENT FAILURE.

Accident investigation: