A318/A319/A320/A321 »ú×éѵÁ·ÊÖ²á FCTM Flight Crew Training Manual(61)

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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 ¬ö
4 Applicable to: MSN 0045-2907, 3271-3305, 3344, 3551, 3620-3687, 3822-3918, 3970, 4020-4052
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.
 

  NORMAL OPERATIONS
TAXI
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

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 nose wheel 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 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.
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