AIRCRAFT SYSTEMS - e-Crew

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A330/A340 FLIGHT CREW OPERATING MANUAL Applicable to: ALL AIRCRAFT SYSTEMS AUTO FLIGHT - FLIGHT GUIDANCE AP/FD VERTICAL MODES - OPEN CLIMB MODE DISENGAGEMENT CONDITIONS The OPEN CLB mode is disengaged by one of the following conditions: ‐ Engagement of any other vertical mode ‐ Selection of a lower altitude (on FCU) than the current aircraft altitude. V/S (FPA) engages on current V/S (FPA) (Refer to DSC-22_30-75 General). Applicable to: ALL GUIDANCE When OPEN CLB is engaged, the target speed/Mach is maintained by adjusting the pitch with the elevator whereas thrust is maintained either by the A/THR, or manually by the flight crew. Speed may be either selected or managed. The OPEN CLB mode disregards all altitude constraints up to the FCU selected altitude. Note: A level change of less than 1 200 ft in OPEN CLB mode with A/THR active produces a 1 000 ft/min climb. RJA A330/A340 FLEET DSC-22_30-70-30 P 2/2 FCOM C to D 03 MAY 11
A330/A340 FLIGHT CREW OPERATING MANUAL Applicable to: ALL AIRCRAFT SYSTEMS AUTO FLIGHT - FLIGHT GUIDANCE AP/FD VERTICAL MODES - DESCENT MODE GENERAL The DES mode guides the aircraft along the descent path computed by the FMGES. The system computes this flight path backwards from the deceleration point up to the top of descent (T/D), with respect to the speed and altitude constraints. At the deceleration point, the guidance begins the deceleration to VAPP, to be reached at 1 000 ft above touchdown on the final descent path. Internally, the computer divides the descent path into various segments, depending on the relative positions of the constraints. It starts at top of descent (T/D) by setting up an “idle” segment that takes the aircraft down to the first constraint, and follows this with “geometric” segments between constraints. The descent profile takes into account wind data and data from the lateral and vertical flight plans, and it is based upon the managed descent speed profile. It does not take holding patterns into consideration. The descent profile has several segments: ‐ A repressurization segment. When necessary, this produces a repressurization rate for the cabin during descent. It is a function of the destination airport altitude and the selected cabin rate (defaulted to - 350 ft/min but this can be modified) ‐ Idle path segment. The AP/FD controls the speed and the autothrust stays at idle thrust. The guidance computes this profile from top of descent or the end of the repressurization segment to the first vertical constraint that cannot be flown at idle thrust ‐ Geometric path segments. The AP/FD controls the vertical path, and the autothrust controls the speed. These segments take the aircraft from the first constraint to the deceleration point. RJA A330/A340 FLEET DSC-22_30-70-50 P 1/16 FCOM A → 25 NOV 11
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