The Boeing 757 commercial jet transport experienced a series of uncommanded roll events requiring pilot action to maintain wings-level flight. Investigation revealed failures within the spoiler control actuator that allowed excessive internal leakage. This significantly reduced the capability of the actuator to hold the spoiler surface down against aerodynamic forces, and allowed the panel to float.
Spoiler Actuator - Problem Investigation
Sae Technical Papers
Aerospace Technology Conference and Exposition ; 1992
1992-10-01
Conference paper
English