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Type Rating 737 OO-JAX > Flight controls > Flashcards

Flight controls Flashcards

1
Q

What happens with aileron input?

A

Control Wheel connected to aileron PCU through aileron feel and centering unit

FO control Wheel is connected by cables to the spoiler PCU through the spoiler mixer

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2
Q

What does aileron trim do?

A

It electrically repositions the aileron feel and centering unit

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3
Q

What happens when aileron trim is used when using AP?

A

Autopilot overpowers trim but aileron can be out of trim upon disengagement of AP

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4
Q

When will the flight spoilers begin to rise in a turn?

A

When control Wheel is displaced by approx more than 10 degrees

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5
Q

How is stabilizer powered?

A

Electrically

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6
Q

How is elevator deflection achieved

A

By the use of PCU’s

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7
Q

How is elevator feel created?

A

Elevator pitot gives signal to elevator feel and centering unit which transfers the signal to the control columns

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8
Q

How and when does mach trim system work?

A

Above mach .615 FCC use mach info from ADIRU to compute mach trim actuator Position. Mach trim actuator repositions elevator feel and centering unit which adjusts neutral control column position

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9
Q

What modes do exist for stabilizer trim

A

High (trim) speed with Fext
low (trim) speed with Fret

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10
Q

What happens to trim of control column has opposing force

A

Trim will stop

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11
Q

What does STAB trim override switch do

A

It enables opposing control forces

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12
Q

What are the stabilizer bands

A

Main elec
Fext 0.05-14.5
Fret 3.95-14.5

Ap 0.05-14.5

Trim Wheel -0.20-16.9

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13
Q

What is the purpose of STS?

A

To return AirPlane with low gross weight, aft CG and high thrust to trimmed speed

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14
Q

When does STS operate?

A

100 KIAS - 0.6M with fadeout at 0.68M

10 sec after to
5 sec After trim release
Ap not engaged
Sensing of trim requirement

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15
Q

What does YD do at impending stall

A

Reduces yaw damper commanded movement

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16
Q

What does the ELev feel shift module do in case of impending stall?

A

Increases hyd press A to elev feel and centering unit. This will approx double control forces

17
Q

When is EFS inhibited

A

Ac on GND

RA less than 100ft

AP engaged

18
Q

What is main difference between stby rud PCU en main rud PCU

A

Main rud PCU has 2 input rods and control valves

STBY rud PCU has 1 input rod and control valve

19
Q

What is the difference on ridder on GND and in flt

A

When approx above 135kts hyd A and HYD B pressure are reducered by 25% by rudder PCU to limit rudder authority

20
Q

What happens of one rudder input is jammed?

A

Force flight monitor detects opposing pressure. It auto turns on stby rudder

21
Q

How many yaw dampers installed?

A

Main and stby

22
Q

What happens to roll with speedbrakes extended

A

It greatly increases roll Rate

23
Q

What are the conditions for speedbrake system to operate auto upon ldg

A

Lever armed

Armed light illuminated

RA less than 10ft

Weight on wheels (GND spoilers right main gear)

TL set idle

Wheel spin up (>60kts)

24
Q

What does happen on Fup ldg with spoilers

A

They go to flight detent

25
Q

Once lever not armed what are the conditions for auto speedbrake

A

Main gear spin up

Both TL idle

Reverse thrust selected

26
Q

What happens when thrust is advanced with speedbrakes ext

A

They retract

27
Q

When does flap load relief system operate

A

When left ADIRU (captains airspeed) is too high for selected flap setting

28
Q

When is flap load relief function active

A

F10-F40 with normal flap extension

29
Q

When does LE uncommanded motion occur

A

When no autoslat command or flap pos command is given and

2 slats move on 1 wing or 2 LE flaps move on 1 wing

30
Q

What can speed trim and mach trim fail indicate?

A

Failure of single FCC channel when light extinghuishes after recall is reset

31
Q

What can auto slat fail light indicate

A

Failure of SMYD when extinghuished with master caution reset

32
Q

What does speedbrake ext light indicate

A

In FLT speedbrake beyond armed and

TE > 10 or
RA < 800ft

on GND speedbrake lever in down and ground spoilers not stowed

With hyd A press less than 750PSI light wont work on GND

33
Q

What does speedbrake do not arm mean

A

Abnormal condition or test Inputs to auto speedbrake system or during landing Wheel speed below 60kts and lever not down

Type Rating 737 OO-JAX (11 decks)

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