Flight controls 747-400 Flashcards
Aileron lockout system.
When is it locked, and when is it inhibited?
Locked above 235Kts and inhibited with flaps extended.
What happends to the artificial elevator feel force if you loose hyd system 2 and 3?
Feelforce is by springs, and airspeed reference is lost.
Describe the elevator artificial feel force.
Powered by hydraulic systems 2 and 3. Increasing force with increase in airspeed.
Which part of the elevator system is inoperative with the loss of hyd system 1?
The left outboard elevator.
With the loss of hyd system 3, what happens to the upper yaw damper?
The upper yaw damper fails.
During flap extension hyd system 4 fails. What happens to the TE flaps?
The outboard TE flaps will operate electrically on secondary and the inboard TE flaps would operate hydraulically on the primary.
With the loss of Hyd Sys 4, when deflecting the elevator, what will you see on the status page?
Only the left elevator would be indicated.
In flight, pulling the speedbrake lever to flight detent will show what on the status page?
Left spoiler up, right spoiler down.
What happens to the trim rate if the stab trim cutout switch for hyd sys 3 is in the cutout position?
Half trim rate for alternate and control wheel trim.
Where in the flap lever are the gates and their purpose?
1 and 20
1 to prevent retraction of LE flaps
20 to prevent retraction of TE during G/A past G/A setting.
When the SPEEDBRAKE lever is pulled in flight, what spoilers extend?
All 4 inboard spoilers.
Up to what flaps position should the speedbrakes be used?
Up to flaps 10 only.
What flaps are extended in position 1?
All inboard LE flaps only.
What flaps are extended in position 5?
All LE flaps and position 5 for TE flaps.
What trim is inhibited during autoland?
The stabilizer trim on the yoke.
What is the FLAP Load relief function?
A protection against excessive airload when flaps lever is at 30 or 25 position. It retracts flaps to 25 or 20 as appropriate if the max speed is exceeded.
What are the speedbrake limitations with flaps extended?
No speedbrakes with flaps extended past 10.
When will you get the > SPEEDBRAKES EXT indication on primary EICAS?
1) Speed brake lever is beyond ARM and The flaps in the landing position. or 2) RA between 800 and 15ft. or 3) Two or more throttles out of idle.
What is the G/A protection?
If Throttles 1 or 3 come out of idle then the spoilers will retract for go around.
What happens in the secondary flap control mode?
The faulty flaps groups are driver electrically.
If the inboard TE flaps extension failed due to asymmetry, what happens to the outboard TE flaps?
They remain in primary mode.
The stabilizer is hydraulically powered by what hyd systems?
Hyd sys 2 and 3.
How can you stop an unscheduled stab movement immediately?
Move the control column in the opposite direction of movement.
During a jammed stab, what is required?
Only the elevator works and a higher approach speed is required.
