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taxi speed.
BRAKE TEMPERATURE
Applicable to: ALL
The FCOM limits brake temperature to 300 °C before takeoff is started.
This limit ensures that, in the case of hydraulic fluid leakage, any hydraulic fluid, that may come into
contact with the brake units, will not be ignited in the wheelwell.
This limit does not ensure that, in the case of a high energy rejected takeoff, the maximum brake
energy limitation will be respected.
Thermal oxidation increases at high temperatures. Therefore, if the brakes absorb too much heat,
carbon oxidation will increase. This is the reason why the brakes should not be used repeatedly at
temperatures above 500 °C during normal operation. In addition, after heavy braking, the use of
brake fans can increase oxidation of the brake surface hot spots, if the brakes are not thermally
equalized.
BRAKING ANOMALIES
Applicable to: ALL
If the ACCU PRESS drops below 1 500 PSI, the flight crew should be aware that the Parking Brake
can, quite suddenly, become less efficient. This explains the amber range on the hydraulic pressure
gauge of the ACCU PRESS.
If the flight crew encounters any braking problems during taxi, they should set the A/SKID & N/W
STRG Sw to OFF. They should not apply pressure to the pedals while setting the A/SKID & N/W
STRG Sw to OFF. Then, the PF should refer to the triple brake indicator and modulate the pressure
as necessary.
BRAKE FANS
Applicable to: ALL
Brake fans cool the brakes, and the brake temperature sensor. Therefore, when the brake fans
are running, the indicated brake temperature will be significantly lower than the indicated brake
temperature when the brake fans are off.
A330/A340 FLIGHT CREW TRAINING MANUAL
NORMAL OPERATIONS
TAXI
A330/A340 FLEET NO-040 P 6/10
FCTM 17 JUN 09
Therefore, as soon as the brake fans are switched on, the indicated brake temperature decreases
almost instantaneously. On the other hand, when the brake fans are switched off, it will take several
minutes for the indicated brake temperature to increase and match the real brake temperature.
When the fans are running, the difference between the indicated and the actual brake temperature
can range from 50 °C (when the actual brake temperature is 100 °C) to 150 °C (when the actual
brake temperature is 300 °C). Therefore, before takeoff, if the fans are running, the flight crew should
refer to the indicated brake temperature. When the indicated brake temperature is above 150 °C,
takeoff must be delayed.
Brake fans should not be used during takeoff, in order to avoid Foreign Object Damage to fans and
brakes.
FLIGHT CONTROL CHECK
Applicable to: ALL
At a convenient stage, before or during taxi, and before arming the autobrake, the PF silently applies
full longitudinal and lateral sidestick deflection. On the F/CTL page, the PNF checks and calls out full
travel of elevators and ailerons, and correct deflection and retraction of spoilers.
As each full travel/neutral position is reached, the PNF calls out:
• "Full up, full down, neutral"
• "Full left, full right, neutral"
The PF silently checks that the PNF calls are in accordance with the sidestick order. The PF then
presses the PEDAL DISC pb on the nosewheel tiller, and silently applies full left and full right rudder,
and then returns the rudder to neutral.
The PNF follows on the rudder pedals and, when each full travel/neutral position is reached, calls
out:
• "Full left, full right, neutral"
Full control input must be held for sufficient time for full travel to be reached and indicated on the
F/CTL page.
The PNF then applies full longitudinal and lateral sidestick deflection, and on the F/CTL page, silently
checks full travel and correct sense of all elevators and ailerons, and correct deflection and retraction
of all spoilers.
If this check is carried out during taxi, it is essential that the PF remains head-up throughout the
procedure.
A330/A340 FLIGHT CREW TRAINING MANUAL
NORMAL OPERATIONS
TAXI
A330/A340 FLEET NO-040 P 7/10
FCTM 17 JUN 09
TAKEOFF BRIEFING CONFIRMATION
Applicable to: ALL
The TAKEOFF BRIEFING CONFIRMATION should only review any changes that may have
occurred since the full TAKEOFF BRIEFING done at the parking bay (e.g. change of SID, change in
runway conditions etc.).
If ATC clears the aircraft to maintain a specific heading after takeoff, turn the FCU HDG selector to
disarm the NAV. The current aircraft heading will be displayed on the FCU and the ND, and the flight
crew can then set the cleared heading. Once airborne, and above 30 ft, RA, RWY TRK engages. To
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A330/A340机组训练手册FLIGHT CREW TRAINING MANUAL(33)
