Automatic Flight & Landing Gear and Brakes

Question 1

Automatic Flight Control System (AFCS) components

Answer 1

1 Flight Guidance Control Panel (FGCP)
2 Flight Guidance Modules (FGM 1, FGM 2)
1 Yaw Damper Actuator Unit (YDAU)
2 Autopilot Actuator Units (APAU 1, APAU 2)

Question 2

Describe the job of the Flight Guidance Modules (FGM 1, FGM2).

Answer 2

provides data processing for:

FD commands, AP and YD actuator commands, pitch trim system commands

Question 3

How many FGMs are required for AP, YD, and FD functions?

Answer 3

Both are required to perform AP and YD functions, one is required for FD

Question 4

What does the YD pushbutton do?

Answer 4

engages or disengages the YD, disengages the AP

Question 5

What does the AP pushbutton do?

Answer 5

engages the AP and YD, disengages the AP

Question 6

What happens when you push the GA pushbutton?

Answer 6

AP disengages, FD commands 10 degree pitch, FD commands wings level, all “armed” FD modes are disarmed

Question 7

AP engagement is inhibited when?

Answer 7

YD fail, roll exceeds 45 degrees, pitch exceeds 20 degrees

Question 8

What ways can the AP be disengaged?

Answer 8

AP DIS button on yoke, Go-around buttons, operating electric pitch trim, AP pushbutton on FDCP, YD pushbutton on FDCP

Question 9

Describe the function of the Autopilot Pitch Trim feature.

Answer 9

automatic pitch trim when AP is engaged to reduce force held by AP pitch servo

Question 10

The AP Pitch Trim functions at what two speeds?

Answer 10

high speed for CAS below 180 kts

low speed for CAS above 180 kts

Question 11

Describe the function of the Flap Auto Pitch Trim feature.

Answer 11

serves to reduce mistrim control column force during flap transitions when the pilot is manually flying the aircraft

Question 12

The Flap Auto Pitch Trim feature automatically engages under what conditions?

Answer 12

airborne for two seconds, CAS less than 180 kts, AP not engaged, not operating Manual Pitch Trim, flaps moving between 15 and 35 or 35 and 15.

Question 13

Degrees of Yaw Damper authority

Answer 13

mechanically limited to +-4.5 degrees of rudder displacement and limited in software as a function of airspeed

Question 14

What monitors and controls the operation of the landing gear components?

Answer 14

Proximity Sensor Electronics Unit (PSEU)

Question 15

Which direction do the landing gear extend and retract?

Answer 15

nose gear - extends aft and retracts forward

main gear - extends forward and retracts aft

Question 16

How many gear pin locations are there?

Answer 16

5 plus 1 nose wheel lock on nose

Question 17

When does the gear warning horn activate?

Answer 17

the gear is not down AND
flaps are greater than 8.5 degrees with either engine torque indicating less than 50% and both power levers positioned aft of the RATING detent OR
airspeed is less than 156 KIAS with both power levers near the FLIGHT IDLE detent

Question 18

LDG GEAR INOP caution light

Answer 18

failure of a hydraulic sequencing valve on any of the gear doors

Question 19

The Alternate Landing Gear Extension system provides a manual means of extending the landing gear when any of the following malfunction occur:

Answer 19

the LDG GEAR INOP caution light illuminates OR
the landing gear indication fails OR
there is a loss of #2 hydraulic system fluid

Question 20

landing gear extension INHIBIT switch

Answer 20

disables the electrical command sent to the landing gear solenoid valve when the landing gear select handle is moved

Question 21

LANDING GEAR ALTERNATE RELEASE door

Answer 21

opening this door mechanically operates (opens) a bypass valve relieving #2 hydraulic pressure form the landing gear uplocks

Question 22

LANDING GEAR ALTERNATE EXTENSION door

Answer 22

gives access to alternate extension hand pump and downlock verification system; opening door mechanically operates (opens) the MLG alternate selector valve which is necessary for pump operation

Question 23

The Anti Skid Control Unit has the following functions:

Answer 23

monitors main gear wheel speeds
modulates the brake pressure applied to each brake unit to prevent wheel lock
gives maximum braking at all levels of runway friction

Question 24

When is the anti-skid system operational?

Answer 24

main gear wheel speeds exceeds 10 kts

reactivates with WOW signal and senses main wheel speed of 35 kts or five seconds after WOW signal

Question 25

ANTI SKID TEST

Answer 25

INBD ANTISKID and OTBD ANTISKID caution lights illuminate for six seconds on the ground or three seconds in the air (with gear down and locked)

Question 26

How many brake applications will a fully charged emergency brake accumulator provide?

Answer 26

up to six

Question 27

Minimum indicated parking brake accumulator pressure for engine start

Answer 27

right engine - 500 psi

left engine - 1000 psi

Question 28

Nosewheel steering radius

Answer 28

rudder pedals - 8 degrees
tiller - 70 degrees
free castor - 120 degrees

Question 29

The nosewheel steering will revert to a passive, shimmy-dampaned, free-castoring mode whenever any of the following conditions exist:

Answer 29

nosewheel steering angle exceeds 70 degrees left or right of center
Steering Control Unit (SCU) fails
STEERING switch is selected OFF
following an alternate gear extension

Question 30

NOSE STEERING caution light

Answer 30

nosewheel steering ECU malfunction or nosewheel castered beyond 70 degrees

Question 31

INBD ANTI SKID caution message

Answer 31

inboard anti skid control unit malfunction or set to off

Question 32

PARKING BRAKE caution light

Answer 32

emergency/parking brake is set

Question 33

OUTBD ANTISKID caution light

Answer 33

outboard anti skid control unit malfunction or it is not energized

Question 34

WT ON WHEELS

Answer 34

PSEU weight on wheels sensor circuit malfunction

Question 35

What does the gauge in the right wing root indicate?

Answer 35

Emergency brake accumulator pressure