Landing Gear

Question 1

Type of landing gear?

Answer 1

fully-retractable, single-wheel, tricycle type

Question 2

How is the LG system powered, by what, and how is it sequenced?

Answer 2

hydraulically, by the right hyd sys, sequenced by hyd selector valves

Question 3

How is the LG system controlled, by what?

Answer 3

electronically, by 19 (double channel) proximity-sensor electronic unit (PSEU)

Question 4

How many doors on each MLG, what are they, and which is attached to the gear itself?

Answer 4

3, fwd rear and mid
mid attached to gear itself

Question 5

How many doors does the NLG have, what are they, where are they hinged?

Answer 5

3, 1 fwd 2 aft
all fuselage hinged

Question 6

The emergency hydraulic system is fully _____

Answer 6

independent

Question 7

Where is the EMERG LDG GEAR handle located?

Answer 7

left console in FCP

Question 8

How do the legs downlock mechanisms operate?

Answer 8

via gravity

Question 9

Will the doors close when emerg LG are operated and what indication will this give?

Answer 9

no, red light in handle remains on

Question 10

When will the emergency accumulator be recharged automatically?

Answer 10

when A/C is on the ground
for a total time of 90 sec from WoW to WoW in flight

Question 11

THE EMERG LDG GEAR HANDLE SHALL NOT BE _______________________ AFTER ACTUATION

Answer 11

RETURNED TO ITS INITIAL POSITION

Question 12

What are the three LG-position indicator lights controlled by?

Answer 12

the FCCs

Question 13

Where can you see the gear indications?

Answer 13

control surface display and the FCS format of the MFD

Question 14

The red warning light in the handle is controlled by?

Answer 14

the MISCO

Question 15

Red handle light illuminates when position of gear/doors s not consistent with the position of the handle or when:

Answer 15

1. Airspeed <170 KIAS
2. <10 000ft MSL
3. One or both throttles <35deg PLA (power lever angle)

Question 16

LDG ACC caution

Answer 16

low pressure in the LG emerg sys <173bar (off>175bar)

Question 17

LDG caution

Answer 17

low pressure in the right hyd sys, normal ops not guaranteed

Question 18

PSEU DEGR caution

Answer 18

LG retraction is not possible bc PSEU has no sufficient info to guarantee safe retraction

Question 19

PSEU FAIL caution

Answer 19

LG extension/retraction not possible bc of PSEU failure, both PSEU channels are unavailable or NOGO

Question 20

Steering system hydraulically powered by the _____ hyd sys

Answer 20

right

Question 21

What are the 2 steering control laws that can be selected by the pilot only when NG on the ground?

Answer 21

1. Low-gain steering +/-3deg (by default)
2. High-gain steering +/-40deg

Question 22

When is shimmy dumping active?

Answer 22

more than +/-1deg and no WoW detected

Question 23

Min hyd pressure in right system for NWS?

Answer 23

168 bar (higher than R HYD LP warning)

Question 24

When does the STEER NOT ENG special alert display?

Answer 24

If steering is not engaged when A/C is on the ground below 70kts and at least one engine throttle is >75% NH

Question 25

When does the STEER HIGH special alert display?

Answer 25

If steering is High-gain when A/C is on the ground and at least one engine throttle is >75% NH

Question 26

STHI NWS mode shall be selected <____kts gs to retain directional control in case of ______.

Answer 26

50, tire burst

Question 27

NWS caution

Answer 27

pressure in R HYD sys drops to 100 bar (even though the sys min op pressure is 168 bar)

Question 28

Below what pressure in the R HYD sys/volume in the right reservoir (at/below) is the brake sys powered by L HYD sys?

Answer 28

175 bar, 2.5L

Question 29

L HYD SYS SUPPLY FOR NORM BRAKING IS ACTIVATED BY THE BRAKE CONTROL UNIT (BCU) ONLT IF _____ AND SPEED IS HIGHER THAN _____

Answer 29

WOW, 5KTS

Question 30

How many (minimum) brake applications are guaranteed by the LG/brake emerg accumulator in case of loss of all hyd systems? Caveat?

Answer 30

6, no antiskid/differential braking, if the emerg circuit has already been used for LG extension

Question 31

ANTI-SKID sys becomes active when wheel speed increases above ____kts and inoperative for wheel speeds below ____kts.

Answer 31

15, 10

Question 32

IF LEFT ENGINE IS STARTED BEFORE RIGHT ENGINE, NORMAL BRAKING IS _____________ UNTIL _____________________.

Answer 32

NOT AVAILABLE, RIGHT ENGINE IS STARTED

Question 33

BRAKES DEGR caution

Answer 33

operation of brake system is degraded

Question 34

BRAKES FAIL caution

Answer 34

there is a failure in the brake computer

Question 35

WITH BCU FAILURES _____________ AND ____________ ARE NOT AVAILABLE. DO NOT PRESS THE BRAKE PEDALS DURING LANDING IF __________ CAUTION IS DISPLAYED AS IT MAY CAUSE ________.

Answer 35

PEDAL BRAKES, ANTI-SKID
BRAKES FAIL, ASYMMETRIC BRAKING

Question 36

FWD or AFT BRAKES caution

Answer 36

front/rear brake pedal sensor inop, pedal sensor in other cockpit controls both brakes w same pedal pressure application

Question 37

L/R BRAKE T caution

Answer 37

brake temp >450C

Question 38

BRAKE 1 caution

Answer 38

L HYD sys is supplying pressurized fluid to the brake sys due to R HYD sys failure

Question 39

WHEELS LKD caution

Answer 39

lock wheel w A/C airborne, PARK & EMER. BK handle (FCP) or EMERGENCY BRAKE handle (RCP) is pulled out