A330/A340 Take-off And Initial Climb
REV 1 (6 JUN 05)
FCTM Take-off
In addition, some new features have been incorporated on the A346:
.
Pitch Limit Indicator (PLI) on the PFD. This indicates the pitch limits when the aircraft is on, or close to, the ground.
.
Modification to the rotation law to account for the characteristics of the aircraft.
FLEX THRUST TAKE-OFF
The FLEX take-off reduces EGT thus increasing engine life and reliability while reducing maintenance and operating costs. The FLEX take-off can be used when the actual take-off weight is lower than the maximum permissible take-off weight for the actual temperature. As the MTOW decreases with increasing temperature, it is possible to assume a temperature at which the actual take-off weight would become limiting. This assumed temperature is called the FLEX Temperature.
The minimum control speeds associated with the FLEX take-off are related to VMCG/VMCA at TOGA thrust. Therefore, should the aircraft suffer an engine failure at V1, there is no limitation on selecting TOGA thrust on the remaining engine(s).
Take-off
FCTM REV 1 (6 JUN 05)
DERATED THRUST TAKE-OFF
A reduction in take-off thrust leads to lower VMCG/VMCA and hence, a lower V1. When taking off from short or contaminated runways where ASDA is the limiting factor, a reduction in the minimum control speeds may generate a take-off performance benefit and a higher MTOW.
A derated take-off is defined as a take-off at a thrust setting less than TOGA. Six (A346: 8) derated levels are defined, (A333/A343: D04, D08, D12, D16, D20, D24) (A346: D28, D32), each corresponding to a specific percentage reduction from the maximum take-off thrust. Derated procedures should only be used on a runway where the weight is limited by VMCG. Derating the thrust to a level below that necessary to meet the performance requirements is not permitted.
During flight preparation, the appropriate derate should be entered in the DRT TO/FLX TO field in the PERF TO page on the MCDU, e.g. D04. The MCDU logic requires specific confirmation of this entry. Derated thrust is selected by setting the thrust levers to the FLX/MCT detent.
4.10.8
A330/A340 Take-off And Initial Climb
REV 1 (6 JUN 05)
FCTM Take-off
As opposed to a FLEX take-off, the selection of TOGA following an engine failure during a derated thrust take-off is prohibited as long as speed remains below the first flap/slat retraction speed for the take-off configuration. The selection of TOGA below this speed in these configurations may result in loss of control due to VMCA considerations.
ADVERSE.WEATHER
Adverse weather that can be encountered during the take-off and intial climb includes:
. Cold.weather . Contaminated.runway
. Windshear
Cold.Weather
When icing conditions exist at 0.C and below, the take-off must be preceded by an engine static run-up to 50% N1 or greater and stable engine operation checked before the start of the take-off run. FCOM 3 refers. If the aircraft has been either de-iced or anti-iced, a pre take-off inspection of the wing upper surfaces must be carried out just prior to take-off for evidence of ice, snow or frost accretion. If the anti-icing holdover time has expired, a visual inspection of the wings for contamination must be performed within the 5 minutes immediately prior.to.take-off.
Contaminated.Runway
Take-off from an icy runway is not recommended. The minimum friction co-efficient.for.take-off.is:
. 0.2.FC.(ICAO) . 0.26.CRFI.(Canada) . 20.ACBA.(USA)
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