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ASN Wikibase Occurrence # 204761
Last updated: 14 June 2020
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Type:Silhouette image of generic SF34 model; specific model in this crash may look slightly different
Saab 340A
Registration: N146CA
C/n / msn: 340A-146
Fatalities:Fatalities: 0 / Occupants: 29
Other fatalities:0
Aircraft damage: Minor
Location:near Buffalo, NY -   United States of America
Phase: En route
Nature:International Scheduled Passenger
Departure airport:Cincinnati/Northern Kentucky Airport, KY (CVG/KCVG)
Destination airport:Toronto-Pearson International Airport, ON (YYZ/CYYZ)
Investigating agency: NTSB
The flight crew detected vibration coming from the right propeller and made a decision to shut the engine down. During the shutdown process the propeller separated from the airplane. Examination of both portions of the failed propeller shaft revealed the shaft failed due to fatigue. Metallurgical examination found a slag inclusion just below the fracture surface. This defect occurred during the melting of the original ingot.

A fatigue fracture on the propeller shaft, that originated at a subsurface slag inclusion, which remained in the material used to manufacture the shaft.


Safety recommendations:

Safety recommendation A-91-129 issued 1 February 1992 by NTSB to FAA
Safety recommendation A-91-129 issued 2 January 1992 by NTSB to FAA
Safety recommendation A-91-130 issued 1 February 1992 by NTSB to FAA
Safety recommendation A-91-130 issued 2 January 1992 by NTSB to FAA

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Download report: Final report


Photo of N146CA courtesy

Detroit - Metropolitan Wayne County (KDTW / DTW)
4 June 1991; (c) Danny Grew

Revision history:

20-Jan-2018 18:55 harro Added
20-Jan-2018 18:56 harro Updated [Narrative]

Corrections or additions? ... Edit this accident description