Enunciados de questões e informações de concursos
This text refers to item
Balance weight was missing
A post-flight inspection revealed that half of one of the balance weights from the right elevator spring tab was missing, along with two nuts that secured the balance weight. The report said that the two bolts associated with the nuts had “migrated out of the remaining half weight and jammed on the top surface of the elevator”; as a result, the elevator spring tab was held in the trailing-edge-down position.
The report said that the Dash 8 pitch-control system comprises “two elevator-control-cable circuits, each operating an independently mounted, spring-tab-assisted elevator. Each elevator has a spring tab at the inboard end and a trim tab at the outboard end.
“The left elevator is actuated by the captain’s control column through the left cable-control circuit and the left elevator spring-tab system. The right elevator is actuated by the first officer’s control column through similar components.”
The two control columns normally are interconnected to allow for simultaneous movements of both elevators.
In the event that one of the controllable circuits jams, the control columns can be disconnected by the elevator-pitchdisconnect system to allow the unjammed circuit to operate normally.
Spring tabs provide ‘aerodynamic assistance’
The report said that the spring-tab system is “designed to provide aerodynamic assistance to elevator movement. There are two mass balances extending forward of each spring-tab leading edge. Each mass balance assembly consists of two weights bolted together and secured to the arm with two bolts.
Flight Safety Foundation. In: Aviation Mechanics Bulletin (adapted).
Based on the text, judge the item below.
The Dash 8 pitch-control system consists of two elevatorcontrol-cable circuits both operating a single elevator.
Outras questões do mesmo concurso: ANAC / TRAC (ANAC) / 2009 / Mecânico de Manutenção Aeronáutica
