Landing Gear

Question 1

Automatic Braking is activated based on _______

Answer 1

spoiler deployment. Do NOT arm spoilers until after flight control check as spoiler movement may cause autobrake activation

Question 2

During an RTO when will ground spoilers deploy?

Answer 2

Ground Spoilers will not deploy until reaching 72 kts

Question 3

Autobrake Braking sequence at touchdown (LOW, MED)

Answer 3

1. Gear touchdown and THR/Levers IDLE
2. Ground Spoilers deploy
3. Autobrakes activate after 1 sec after (LOW), Autobrakes activate immediately (MED)

Question 4

Landing Gear and Door normal operation

Answer 4

Electrically controlled by (2) LGCIU (Landing Gear Control Interface Unit, the controlling unit switches each retraction cycle). Hydraulically actuated gears and doors are supplied by the GREEN system.

Question 5

Landing Gear Gravity Extension

Answer 5

Electrically controlled and mechanically operated. Gear hydraulic system isolated, gear and doors unlock, springs assist in downlocking. If green pressure becomes available, Normal gear retraction is possible.

Question 6

Landing Gear Indicator Panel

Answer 6

Powered by LGCIU 1 which receives signals from proximity sensors. Red UNLK means gear is NOT in selected position. Green Triangle means down and locked.

Question 7

Landing Gear indications on SD WHEEL page

Answer 7

Landing gear positions are indicated by two triangles each:
Left side triangle is powered by LGCIU 1 and the right is powered by LGCIU 2.
Green triangle indicates down and locked.
Red indicates gear in transit. Only one triangle needs to be green in case of fault.

Question 8

Red arrow next to the landing gear handle

Answer 8

Comes on at 750ft RA when: Landing Gear not downlocked in config 2, 3, Full; associated ECAM warning.

Question 9

BSCU

Answer 9

Brake and Steering Control Unit: receives signals from steering hand wheels, rudder pedals, and autopilot to control nosewheel steering angle via GREEN sys hydraulic actuators.

Question 10

Max nosewheel steering angle

Answer 10

72°

Question 11

DECEL light on autobrake pbs means?

Answer 11

The aircraft is slowing at the programmed rate, but the brakes may not actually be slowing it.

Question 12

Four Operational Modes of Braking

Answer 12

1. Normal Braking (antiskid and autobrake)
2. Alternate braking with antiskid (no autobrake, insufficient GREEN pressure, BLUE pressure available)
3. Alternate braking without antiskid (antiskid deactivated: A/SKID and NW/S sw OFF, or power supply failure, or BSCU failure, or low B + G hydraulic press.) pressure from accumulators only.
4. Parking brake

Question 13

Hydraulic accumulator designed to supply at least ___ full brake applications.

Answer 13

7 brake applications

Question 14

A/SKID and N/W STRG sw

Answer 14

ON: for normal operations
OFF:
1. Brake system switches from GREEN to BLUE
2. Antiskid deactivated
3. Nosewheel steering lost
4. Braking pressure displayed on the triple indicator

Question 15

Max brake pressure application when operating in Alternate Braking without antiskid

Answer 15

1000 PSI

Question 16

Why start engine 1 first?

Answer 16

Blue hydraulic pump on engine 1 which recharges the accumulator and provides pressure for the parking brake