Air Contractors AT72 near Edinburgh on Mar 15th 2011, uncommanded rudder deflection
Last Update: July 12, 2012 / 13:13:30 GMT/Zulu time
Incident Facts
Date of incident
Mar 15, 2011
Classification
Report
Airline
Air Contractors
Aircraft Type
ATR ATR-72-200
ICAO Type Designator
AT72
The incident was caused by the incorrect fitment of a cam on the rudder TLU mechanism which was not detected by maintenance personnel. This resulted in rudder control restriction which caused the aircraft to enter an uncommanded roll to the left when the airspeed increased above 185 kt. The required independent inspection of the work and the operational test of the TLU system were not carried out. Commercial pressure was identified as the most significant factor which influenced the decision to perform unapproved and unrecorded maintenance on the TLU system. A contributory factor was the design of the TLU cams, which allowed them to be installed in the incorrect orientation.
Incident Facts
Date of incident
Mar 15, 2011
Classification
Report
Airline
Air Contractors
Aircraft Type
ATR ATR-72-200
ICAO Type Designator
AT72
This article is published under license from Avherald.com. © of text by Avherald.com.
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