Flight controls Flashcards
LE devices?
type & number
4 x flaps
8x slats
LE flaps & slats
number & position each wing
2x flaps inboard
4x flaps outboard
of each engine
Normal landing flap positions
15
30
40
TE flaps
number & position
double slotted flaps inboard & outboard of each engine
speed brakes
consist of?
number & position
Flight & ground spoilers
ground = 4.
2x on upper surface of each wing
flight = 8
4x up surface of each wing
can speed brakes be used on ground & in air?
Flight & ground spoilers on ground
flight only in air. (used symmetrically for braking & alternately for turning)
what do the A & B FLT control switches control?
Hydraulic shut off valves
will isolate each aileron, rudder & elevator from related hydraulic system pressure.
what’s cpt control wheel.connected to?
what’s FO control wheel connected to?
by cables to Aileron power control units (PCU’S)
by cables to spoiler PCU’S
if total hydraulic failure, can aileron still be used?
yes
mechanically positioned.
however control forces will be greater.
if ailerons or spoilers are jammed?
because they are all connected you will be able to feel which side (cpt or FO) is jammed & which side can still provide roll control via respective remaining surface.
can aileron trim be used with AP on?
it can be applied, but the AP will over power it. There will be no indication shown on scale & when AP is released there may be an abrupt roll
what are flight spoiler powered by?
how many are there?
Each hydraulic system A & B is dedicated to a different set of spoiler pairs = ensures symmetry in case of hyd failure.
4x on each wing
can you shut off spoilers?
yes
Hyd px can be removed with two SPOILER switches
when will flight spoilers activate to assist in rolling?
when control wheel is displaced more than 10°
elevator powered by?
Hydraulic system A & B
via power control units (PCU) connected with cables to control column