Landing Gear and Brakes

Question 1

DN LOCK REL button

Answer 1

mechanically releases the landing gear lever down lock solenoid

Question 2

Alternate Gear Extension Lever

Answer 2

when pulled, relieves hydraulic pressure in the landing gear lines and releases all landing gear uplocks

Question 3

Alternate Gear Extension Lever Unlock pushbutton

Answer 3

releases the handle from the fully extended position

Question 4

Electrical Override Switch NORMAL/GEAR DOWN

Answer 4

NORMAL - landing gear lever performs landing gear retraction and extension
GEAR DOWN - electronically bypasses the PSEM, opens the forward and aft doors and extends the landing gear

Question 5

Landing gear warning activates when:

Answer 5

• flap selector lever set to 5 or FULL with gear not down and locked or
• slat/flap 0-4 and RA below 700 agl and either thrust lever below 45 degrees (2 engines) or thrust lever below 59 degrees (1 engine)

Question 6

the brake control module (BCM) functions are:

Answer 6

• locked wheel protection
• antiskid protection
• automatic wheel braking
• touchdown protection

Question 7

When is locked wheel protection active

Answer 7

on ground and wheel speed above 30 kts

Question 8

When is antiskid protection deactivated

Answer 8

below 10 kts

Question 9

How many emergency brake applications do the accumulators provide

Answer 9

six full brake applications

Question 10

max steering angle using hand wheel steering

Answer 10

+76 degrees until 40 knots then decreases linearly to 7 degrees at 100 knots

Question 11

max steering angle using rudder

Answer 11

+-7 degrees

Question 12

the free wheel mode is auto selected when

Answer 12

• air/ground system failure
• steering angle greater than 76 degrees
• steering system failure

Question 13

minimum runway width for turn 170/175

Answer 13

170 - 54 ft 8 in

175 - 59 ft 2 in

Question 14

LG LEVER DISAG warning

Answer 14

a discrepancy between the position of the landing gear control lever and at least on landing gear is detected

Question 15

BRK OVERHEAT caution

Answer 15

brake temp has exceeded normal range

Question 16

EMER BRK FAIL caution

Answer 16

both brake accumulator pressures are low and low pressure of hyd systems 1 and 2 detected

Question 17

BRK LH or RH FAIL caution

Answer 17

loss of both wheel brakes of either the left or right landing gear

Question 18

LG NO DISPATCH caution

Answer 18

landing gear dispatchability is affected

Question 19

LG NOSE DOOR OPEN caution

Answer 19

nose landing gear is locked up and nose landing gear door is open

Question 20

LG WOW SYS FAIL caution

Answer 20

indicates a failure condition in the WOW indication system

Question 21

PRK BRK NOT RELEASED caution

Answer 21

parking brake not fully released

Question 22

STEER FAIL caution

Answer 22

indicates a steering system failure condition when the landing gear is down

Question 23

BRK CONTROL FAULT advisory

Answer 23

at least one pressure transducer has failed, associated wheel operates with degraded braking capability

Question 24

BRK LH or RH FAULT advisory

Answer 24

one pedal of the left or right hand seat has failed

Question 25

BRK PEDL LH or RH SEAT FAIL advisory

Answer 25

one pedal of the left or right hand seat has failed

Question 26

EMER BRK FAULT advisory

Answer 26

pressure on one brake accumulator is low or the inboard and outboard park brake pressures are in disagreement

Question 27

LG TEMP EXCEEDANCE advisory

Answer 27

indicates non dispatch condition related to the landing gear after a brake overheat

Question 28

STEER FAULT advisory

Answer 28

steering system is degraded

Question 29

STEER OFF status

Answer 29

steering is disconnected