Landing Gear Flashcards
What is the meaning of the triangle indications on the ECAM WHEEL page
-indicates the position and condition of the landing gear as independently detected by each LGCIU
-The forward set represents the status of the gear as detected by the active LGCIU
-The rear set represents the status of the gear as detected by the standby LGCIU
Recall the indications of landing gear detected down and locked
-Forward set of triangles on the ECAM WHEEL page appear in green
-Three triangles appear on the landing gear indicator panel
-LDG GEAR DN appears in green on the E/WD
What is the meaning of a red UNLIK lights on the LDG GEAR panel
Indicates that a specific gear is not being detected as being locked in the selected position
What is indicated by the illumination of the red arrow on the landing gear selector lever panel
-The aircraft is in the landing config (below 750 ft RA)
and
-the landing gear is not down and locked
Recall the operation of GRAVITY GEAR EXTN Hand crank
-lift into position, breaking the securing safety wire
-Rotate clockwise three turns to the mechanical stop
Recall how the brake and steering control unit (BSCU) is activated
the BSCU is activated by placing the A/SKID & N/W STRG switch to the ON position
Recall what is indicated by the NW STRG DISC display on the E/WD memo section
Nose wheel steering from the flight deck is inhibited because the tow control lever on the nose gear strut has been place in the TOW position and:
-NW STRG DISC appears in green when both engines are shutdown
-NW STRG DISC appears in amber when at least one engine is running
NOTE NW STRG DISC is not displayed when the A/SKID & N/W STRG switch is placed to OFF
Recall the controls for nose wheel steering
-Tillers on the CAs and FOs side controls
-Rudder pedals
-Autopilot during auto landings
Recall the possible Anti-skid braking config
-normal brakes with anti skid (green hydraulic pressure)
-Alternate brakes with anti skid (yellow hydraulic pressure)
NOTE in the event of total BSCU failure or failure of both green and yellow hydraulic systems, alternate brakes without anti skid is available, powered by yellow system accumulator
What is indicated on ACCU-PRESS and BRAKES indicator
ACCU-PRESS- displays yellow system brake accumulator pressure. the green band represents a full charge
BRAKES- Displays yellow system pressure being applied to respective brake
Green Arcs- Represent the safe application pressure range when brakes are being manually applied without anti-skid protection
NOTE indications are not associated with the normal braking or green hydraulic system
Recall the location and meaning of brake temperature indications
-appears on the ECAM WHEEL page
-green arc appears over the wheel with he hottest brake temperature over 100°C
-Arc turns amber if a brake temperature exceeds 300°C
Recall the meaning of the release indicators on the ECAM WHEEL page
Horizontal green lines appear
-temporarily when the landing gear is lowered to indicate that the individual wheel brake is released and anti skid is armed
-reappear after touchdown along with the REL display when antiskid is active
What is the min ground speed required for auto brake activation
72 knots
recall the function of each auto brake pb selection
LO - Commands progressive brake pressure application 4 seconds after ground spoiler deployment signal has been generated
MED- commands progressive brake pressure application 2 seconds after ground spoiler deployment signal has been generated
MAX- commands progressive brake pressure application immediately after ground spoiler deployment signal has been generated
NOTE MAX selection is only authorized for takeoff
What is the meaning for DECEL (green) indication on the AUTO BRK pb
Indicates the actual deceleration rate is 80% of the selected rate
