A330/A340 Pre-Start, Start And Taxi
REV 1 (6 JUN 05)
FCTM Taxi
Taxi
FCTM REV 1 (6 JUN 05)
A346 TAXI CAMERA
The Taxi Aid Camera System (TACS) can be useful in observing areas beneath the aircraft. The TACS is designed to aid in determining the nose and main gear position prior to and during taxiing and its use should be limited to these functions. Direct visual observation out of the cockpit window remains the primary means of determining when to initiate turns and verifying the aircraft’s position relative to the intended ground track. The oversteer technique is required before entering a turn. Once stable in the turn, the magenta square on the upper section of the TACS display tracks close to the taxiway centre line. The TACS display may be used sparingly to determine the proximity of the gear to taxiway edges and when the main gear has cleared the turn. Do not fixate on the TACS display at the expense of aircraft control.
No crew procedure or action, except use while taxiing, is predicated on the use of TACS. The ECAM remains the primary means of alerting crew to non-normal situations. TACS use during take-off, approach and landing is prohibited. Certain state authorities prohibit the display of the TACS view within the cabin.
TAXI SPEED AND BRAKING
On long straight taxiways and with no ATC or other ground traffic constraints, allow the aircraft to accelerate towards 30 kt and then use one smooth brake application to decelerate towards 15 kt. Do not "ride" the brakes. The ND ground speed read out should be used to assess taxi speed.
CARBON BRAKES
Carbon Brake wear is a function of the number of brake applications and brake temperature. The wear is not a function of the pressure applied or the duration of the braking. The only way to minimise brake wear is to reduce the number of applications.
BRAKE TEMPERATURE
The FCOM limits brake temperature to 300.C before commencement of take-off. This limit ensures that any hydraulic fluid which might come into contact with the brake units would not be ignited after gear retraction. It does not provide protection against an elevated brake temperature after gear retraction resulting from a dragging brake. Experience indicates that brake temperatures close to 300.C tend to reduce during taxi-out provided correct braking technique is used and no mechanical abnormality exists.
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