FCOM QUESTIONS Flashcards
DITCHING guarded pushbutton, what happen?
“close” signal to the
outflow valve,
emergency ram air inlet,
avionics ventilation inlet and extract valves,
pack flow control valves.
Note: The outflow valve will not close automatically, if it is under manual
control
CAUTION: If the ditching pb is set to ON, with the low pressure ground
cart connected and all doors closed, a differential pressure will
build up
“HIGH” or “LOW” on the PROG page
“HIGH” or “LOW” on the PROG page indicates the FM position accuracy, based
on estimated uncertainty. When GPS PRIMARY mode is lost, the flight crew must
periodically check this position accuracy. In GPS PRIMARY mode, the position
accuracy is always at HIGH.
Below maneuvering speed (F, S, Green Dot) BANK LIMITATION
Below maneuvering speed (F, S, Green Dot) – 10 kt, the autopilot or flight director
(AP/FD) cannot order a bank angle greater than 15 °.
Above maneuvering speed – 10 kt, this limit linearly increases until it reaches:
‐ In selected lateral guidance: 25 ° at maneuvering speed – 3 kt. The limit is then
25 ° for all speeds above maneuvering speed – 3 kt.
‐ In managed lateral guidance: 30 ° at maneuvering speed – 3 kt. The limit is
then 30 ° for all speeds above maneuvering speed – 3 kt.
FMGS RESET
When the FM software cannot work properly or receives instructions to perform impossible
operations, it automatically resets itself. A resynchronization with the other FM always follows.
When the reset is a minor one, the system will recover by itself. One single reset lasts 2 to 3 s maximum followed by 25 s of resynchronization.
When the reset is a major one:
‐ Resets recur at short intervals (several in 2 or 3 min)
‐ The memories are cleared, leading to the loss of F-PLN, GW, CI, CRZ FL, MCDU-entered
speeds and NAVAIDs and to database switching
CAUTION: If three dual FM resets occur in 2 min, pilot-entered data is lost. If a dual reset is
identified, it is recommended that the flight crew does not perform again the last
MCDU actions for 1 min (in order to avoid a potential second dual reset, leading to
the loss of pilot-entered data)
NOTE: 2 MINUTES ONLY ON OUR PR-YY FLEET. ALL OTHERS ACFT IS 3 MINUTES
FMS erronous trajectory display during cockpit preparation, example showing a right turn instead of a left turn. Should we still use?
CAUTION: Even if the flight plan is correct during the Cockpit Preparation or during the
Descent Preparation, the FMS may compute and display an erroneous trajectory
when the FMS updates its predictions after takeoff or after go-around initiation.
THE CREW SHOULD SELECT HDG/TRK
A/THR instinctive disconnect for 15 s
CAUTION: If the flight crew presses, and holds one A/THR instinctive disconnect pb for more
than 15 s, the A/THR will disconnect for the remainder of the flight. All A/THR
modes, including A.FLOOR, will be lost. The A/THR will be recovered at the next
FMGC power-up on the ground.
IDG DISCONNECT PB
CAUTION:
1. Maintaining the IDG pb-sw during more than 3 s may
damage the IDG disconnection mechanism. SOLENOID.
- Disconnect the IDG only when the engine is running or
windmilling. If not, the IDG will be damaged when starting
the engine.
What happen if you push RAT PB on OVHD HYD PANEL?
It will activate RAT but not start GCU generator control unit
What conditions cause RAT to auto deployment?
Losses of AC BUS 1 and AC BUS 2 if airspeed above 100 kts.
WHICH BUSES EMER GEN SUPLIES?
Basically all essentials. AC ESS BUS and AC ESS SHED.
Thru ESS TR powers DC ESS and DC ESS SHED
EMER GEN APPEAR GREEN ON MEMO.
When RAT & EMER GEN red FAULT LIGHT comes ON?
When EMER GEN is not suplying power to AC ESS and DC ESS with AC BUS 1&2 losses
Can we Test EMER GEN PB on cockpit preparation?
NO, this a maintanece procedure.
With RAT deployed, and the airspeed below 100 kts or stalls, which electrical buses are powered?
DC BAT BUS is AUTO connected to the BATTERIES.
The AC ESS thru the STATIC INV and DC ESS thru batteries. They are automatically shed.
We lost AC ESS SHED and DC ESS SHED.
With RAT deployed, in ELEC EMERG config, on ground below 50 kts, what we loose?
We loose the AC ESS.
The AC ESS BUS is automatically shed, and all EFIS and ECAM displays are not powered.
What happen if you push MAN ON RAT PB on OVHD EMER ELEC PWR?
This PB is normally in auto. If you push RAT will deploy at any speed and activate the GCU.
What is the function of GEN 1 LINE PB on OVHD EMER ELEC PWR?
It’s primary function is to smoke drill in case of AVNX SMOKE.
It’s disconnect the GEN 1 line to AC BUS 1. Basically you disconnet the GEN 1 from the electrical logic schematic.
When IDG FAULT lights comes ON? What happen if you push more than 3 sec?
IDG low oil pressure, or
IDG high oil temperature
IF you push more than 3 sec it may damage the disconnect solenoid.
Is it possible to disconnect IDG if engines stopped?
NO, it must be running or windmilling.
What is the function of the ACC ESS FEED FAULT light on OVHD ELEC PANEL?
and what is the ALTN PB?
ACC ESS and DC ESS is normally power by AC BUS 1. If you loose AC BUS 1 then the AC ESS and DC ESS should by powered by AC BUS 2. If the FAUL light comes ON, the AC ESS and DC ess are not powered. you should press ALTN PB to complete the transfer.
APU FIRE detection. How many loops and discharge bottles?
2 LOOPS, A & B
1 bottle.
APU FIRE detection, with 1 loop fail. Do we still have fire detection?
YES, the logic is LOOP A and LOOP B or LOOP A or LOOP B in case of a single loop failure.
Explain the RED DISC of APU during external check?
This dis is the APU FIRE EXTINGUISHER OVERPRESSURE INDICATION. If it’s not there, the botlte has been discharged or loosed its pressure.
Does APU has automatic shutdown in flight? What happen if you push APU FIRE PB on OVHD APU ?
NO auto shutdown in flight.
If you press the PB you close:
SHUT DOWN APU
DEACTIVATE APU GEN
LP FUEL VALVE,
APU FUEL PUMP
APU BLEED VALVE
XBLEED VALVE
Arm squibs.
APU FIRE on ground?
auto shutdown and bottle discharge after 3 sec of FIRE detection. A horn on maintenance panel will be activate.