Airbus a330 Steering technique and visual cues


STEERING TECHNIQUE AND VISUAL CUES 

On straight taxiways, taxi as close to the centreline as possible while keeping the nose wheel off the taxiway centreline lights. Taxing over the centreline lights. Particularly at high speeds, is noisy and uncomfortable for the passengers. If the pilot displaces the aircraft such that his body is over the centreline, this should allow sufficient displacement from the taxiway centreline. 

There are a number of factors that govern when a turn should be initiated. The main gear on the inside of a turn always cuts the corner and tracks inside of the nose wheel track. For this reason, the "over-steer" technique must be used. As the turn is commenced, steer the nose wheel for enough outside the centreline to keep the main gear evenly straddling the centreline. Be aware that the nose gear is 5m behind the flight deck and the main gear (A333/A343:30m)(A346:35m) behind the flight deck. 

For turns of 90° or more. speed should be below 10 kt. Smoothly initiate the turn as the intersecting taxiway centreline (or intended exit point) approaches the centre of the nearside window aft edge of the offside windshield 


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TAXI SPEED 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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