SYSTEMS Flashcards
AT WHAT STAGE IN FLIGHT WILL A REACTIVE WINDSHEAR OPERATE?
Provided by the FAC in T/O & APP phase:
At T/O, 3s after lift off - 1300ft RA
At landing, 1300ft - 50ft
At least CONFIG 1
Visual “WINDSHEAR” red msg onPFD’s 15s & aural warning X3
WHAT ARE THE UNPRESSURISED AREAS?
- Radar Cone
- Nose Gear Bay
- AIR COND compartment
- Main GEAR bay
- Tail cone
FCOM-A/C GEN-20-20
HOW IS THE CABIN/COCKPIT TEMP CONTROLLED?
Via the AIR COND panel. Temp regulation is ensured by 2 Air Conditioning System Controllers (ACSC) which both have 2 lanes.
Regulated via the HOT AIR pressure regulating valve, TRIM AIR VALVES (add HOT air), tapped upstream of the packs, to the air from the mixing unit.
FCOM-A/C SYSTEMS-21-10-AIR CON
HOW DOES THE PACK FLOW CONTROL VALVE OPERATE?
The valve is PNEUMATICALLY operated and ELECTRICALLY controlled. It gets its signals from ACSC.
If NO air pressure then a spring keeps it closed.
Valve automatically closes in the event of OVERHEAT, ENG START, operation of fire PB’s or ditching PB.
FCOM-A/C SYSTEMS-21-10-20
WHAT IS THE EMERGENCY RAM AIR USED FOR?
To ventilate the cockpit/cabin to remove smoke or if both packs fail. Operated via RAM AIR PB, outflow valve moves to 50% position.
FCOM-A/C SYSTEMS-21-10-20
WHERE IS THE AIR SUPPLIED VIA?
It is fully automatic. Supplied via: -2 PACK flow control valves -2 PACKS - the mixing unit, from the cabin and packs
FCOM-A/C SYSTEMS-21
WHAT ARE THE PACK FLOW %’S WHEN SELECTED IN LO/NORM/HI?
LO - 80%
NORM - 100%
HI - 120%
FCOM-A/C SYSTEMS-21-10-50
WHAT ARE THE FOUR FUNCTIONS OF CABIN PRESSURISATION?
- GND- Fully opens outflow valve on the GND.
- Prepressurisation -During T/O, increases cabin pressure to avoid a surge in pressure during rotation.
- IN FLIGHT-Adjusts cabin altitude for PAX comfort.
- Depressurisation-After touchdown, gradually releases residual cabin pressure before GND function.
FCOM-A/C SYSTEMS-21-20-10
WHAT DOES THE CABIN PRESSURISATION SYSTEM COMPRISE OF?
- 2 Cabin Pressure Controllers CPC
- 1 Residual Pressure Control Unit RPCU
- 1 Outflow valve (1 actuator that has 3 motors, 2 auto & 1 manual)
- 1 control panel
- 2 Safety Valves
FCOM-A/C SYSTEMS-21-20-10
WHERE DO THE CPC’s RECEIVE SIGNALS FROM?
- ADIRS
- FMGC
- EIU
- LGCIU
- EMER RAM AIR
FCOM-A/C SYSTEMS-21-20-20
WHAT DOES ‘OPT ALT’ MEAN ON THE CRUISE PAGE?
Optimum Flight Level. lowest cost for a given flight plan, cost index & gross weight. The FM updates this figure during the flight.
WHEN DOES THE ‘RAT’ AUTOMATICALLY DEPLOY?
When AC BUS 1 & 2 are lost.
WHAT IS THE MAXIMUM ALTITUDE FOR THE GEAR BEING EXTENDED?
25,000FT
WHEN IS THE PTU INHIBITED?
- During 1st ENG start and self tests during 2nd ENG start.
- also inhibited during & 40s after automatic operation (opening or closing cargo doors) of the yellow electric pump
ABOVE WHAT SPEED WILL AUTOBRAKE MAX OPERATE IN A REJECTED T/O?
72kt
AT WHAT SPEED DOES THE NWS STOP?
130kt
AT WHAT HEIGHT CAN THE AUTOPILOT BE USED ON T/O?
100ft
5s after lift off
WHAT IS ‘SAT’ & ‘TAT’?
- SAT = Static Air Temp, outside air temp
- TAT = True Air Temp, surface of the skin temp. usually warmer due to air compression.
WHICH HYDRAULIC SYSTEM RUNS THE NORMAL BRAKES?
GREEN
NAME THE 4 DIFFERENT TYPES OF BRAKING
NORMAL
ALTERNATE WITH ANTI-SKID
ALTERNATE WITHOUT ANTI-SKID
PARKING BRAKE
TALK ABOUT THE BANK PROTECTIONS
- If >33’ and sidestick released the A/C will return to 33’
- Limit is 67’
- if AOA or Highspeed protections activated then limited to 45’
- AUTOTRIM inhibited above 33’
WHAT ARE THE PITCH LIMITS
- +30’ Nose up in CONF 0-3
- +25’ Nose up in CONF FULL
- -15’ Nose down
TALK ABOUT ‘ALPHA FLOOR’
- Automatically sets TOGA when A/C reaches high AOA
- FAC generates signal
- Available from lift off to 100ft
- ALPHA FLOOR - TOGA LK, disconnect autothrust to regain control of thrust.
HIGH SPEED PROTECTION WHAT DOES IT DO?
- Automatically recovers from high speed upset.
- ALARM Activates at VMO +6kt/MMO +M0.01
- Pitch trim is frozen, A/C roll to 0’. Bank angle is limited to 45’
- Nose up order applied at VMO+16kt
FCOM DSC-27-20-10-20
