900 Flight Controls Flashcards
The two types of spoilers on the 900 are the,
Outboard spoilers/spoilerons
Inboard spoilers/flight spoilers
The multi function spoilers are used for?
Assisting the ailerons for turn coordination as well as used for ground lift dumping.
What’s drives the flaps?
a PDU
The emergency flap switch selects the flaps to?
20°
Actuated by the SFECU
Under 230 kn
What’s commands the PDU to deploy or retract the slats and flaps?
The SFECU’s
Slat/flaps electronic control units
When do we have half speed flaps?
When one of the two PDU’s fail
Each spoiler is actuated by?
A single electro hydraulic PCU
Power control unit
What controls spoiler operation?
Spoiler stabilizer control units(SSCU)
2-dual channel
Roll assist is provided by?
Multi functional spoilers
Primary flights controls?
Ailerons
Rudder
Elevators
Spoilerons
Aileron.. Autopilot is connected to which side?
First officer side
How many PCU’s Power the ailerons?
2/side
Hydraulic
Mechanically controlled by either control wheel
Function of the flutter dampers?
Prevent surface flutter in the event of hydraulic fluid loss at the PCUs during flight
Gust lock function on the ground
If roll disconnect handle is pulled?
Unaffected aileron and opposite side spoileron
20 seconds…ROLL SEL
SPOILERON ROLL CAUTION
press ROLL SEL on operable side
( allows use of both spoilerons)
Aileron AP servo connected to?
Rt elevator stystem
What automatically controls operation of the spoilers?
SSCU’s
Spoiler stabilizer control units
Ailerons..
Operated?
Controlled?
Electrically operated
Manually controlled
Control jam of rudder?
Pedals remain operable through anti-jam mechanisms
Each yaw damper response to inputs from
One flight control computer
One yaw damper must be engaged for the autopilot
Stall protection system is connected to which side?
Right elevator system
Autopilot is connected to which elevator system?
Left elevator system
4 modes to the SSCU
Manual trim
Autopilot trim Auto trim( flaps extended or retracted)
Mach trim(for pitch down tendencies)
How many PCU’s per spoiler?
1 PCU /spoiler
When is roll assist used?
At low speeds
When aircraft approaches a high angle of attack, The stall protection computer well?
Stick shaker
Continuous ignition
Disengage autopilot
To activate the stick pusher?
Both switches must be selected to on
Horiz stab trim priority?
Pilot Copilot Autopilot Autotrim Mach trim
With AP engaged, high rate of horiz trim mvmt occurs when?
When. Flaps are extending or retracting
Mach trim oprates when?
Autopilot off and no pilot trim commands inputted
If PCU runaway? Remaining PCU’s?
Remaining PCUs override runaway
Yaw damps controlled by?
FCCs
Bute door?
Directs airflow over flaps leafing edge vane
Btms displayed?
Gear and flaps indications
How are the ailerons connected
The ailerons are directly connected to the control yoke through linkage and police
How many aileron Flutter dampers for aileron?
1
When are Fletcher dampers visible on the synoptic page?
Only when failed
How many your dampers needed for the autopilot
1
Is there a memory item for uncommitted YAW?
Yes
How many PCU suse for spoiler!
1
How is the aileron trim switch controlled and operated?
Electronically controlled
Electronically operated
Aileron trim indications on the synoptic page… Color on the ground for neutral position?
In-flight?
Indications green for neutral position on the ground
White once airborne regardless of setting
Function of Bute doors?
Direct air flow over the flaps leading edge then
Where are the two gates on the flap lever?
8° retraction
20° extension
When do the slat flap position indications up here?
Flaps out a zero
Or
Landing gear extended
BTMS in red range
Is there any to direct linkage for the multifunction spoilers?
No
Fly by wire controlled no direct linkage
Electronic. Signals from the SSCU
What do tge PCUs do?
Translate control yoke movements into hydraulic actuation of the ailerons
Are the ailerons independent?
Can be disconnected by a disconnect handle
When the ailerons are disconnected who controls what??
Captain controls left aileron and right MFS
FO controls right aileron and left MFS
How many yards dampers needed for autopilot
One-yard damper needs to be engaged for the autopilot to engage
MFS?
Flight spoilers
And
Spoilerons
Slowest rate of trim?
Mach trim
fastest=pilot manual trim
Slats actuated?
Electrically(pdu)
Bute doors?
Direct airflow over flaps leading edge vane
Trim clacker??
Mire than 3 seconds
Mach trim avail abv?
.40
Where is the primary feel unit located?
First officers rudder pedal assembly
Each elevator system is hydraulically powered by how many PCUs
3
How many stab channels need to be engaged for Mach
trim
One channel must be engaged
