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ASN Wikibase Occurrence # 217218
Last updated: 21 September 2021
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Type:Silhouette image of generic DH8A model; specific model in this crash may look slightly different
de Havilland Canada DHC-8-102
Owner/operator:Mesaba Aviation
Registration: N852MA
MSN: 349
Fatalities:Fatalities: 0 / Occupants: 11
Other fatalities:0
Aircraft damage: None
Location:Charleston, WV -   United States of America
Phase: Take off
Nature:Passenger - Scheduled
Departure airport:CRW
Destination airport:Roanoke, VA (ROA)
Investigating agency: NTSB
The captain said that during takeoff rotation, the airplane rolled left. He noted no warning lights or horns before or during the event. He applied right control wheel and right rudder to stop the left roll. After the captain had the airplane's roll stabilized, he 'made a wide left pattern and returned to the departure airport.' The airplane was landed without further incident. A postincident inspection of the airplane revealed that the left inboard roll spoiler was 'jammed and partially deployed.' An examination and disassembly of the roll spoiler servoactuator revealed that a plug (PN A50993-1), which had been fusion-welded into the base of the piston (PN A50992-1), had separated and lodged between the base of the piston and the shims, restricting the piston's movement. Dowty Aerospace (the manufacturer) had recorded six previous failures of fusion welds in pistons on DHC-8 roll spoiler servoactuators before this incident.

Probable Cause: a fractured fusion weld in the piston of the roll spoiler servoactuator, which allowed the plug at the base of the piston to separate and jam the piston. A factor relating to the incident was: the inadequate design of the airplane's roll spoiler servoactuator piston.



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

Safety recommendation A-98-83 issued 20 August 1998 by NTSB to FAA

Revision history:

03-Nov-2018 20:56 ASN Update Bot Added

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