Speed Preselection for Climb Phase
 Figure 029

R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 22-73-00Page 65/66 1201-212, 1Config-1 May 01/05 1 1 1CES

 Manual Speed Selection - Effect on Predictions
 Figure 030

R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 22-73-00Page 67/68 1201-212, 1Config-1 May 01/05 1 1 1CES  If the A/C speed gets 5 kts above target speed, the aircraft diverges from the descent profile maintaining selected speed on elevator and idle thrust ; Descent path control is recovered if the aircraft reintercepts the profile. (Ref. Fig. 031, 032)

 -If there is no Manual speed preselected for CRUISE phase, the message SET SPEED AUTO is displayed on the MCDU and the PFD upon transition to CRUISE. (Ref. Fig. 033)
 -30 seconds prior to a deceleration required for an HM leg (if the FCU selected speed is greater than the holding speed precomputed by the system), the message SET HOLD SPEED is displayed on the PFD and MCDU.
 (4)
 VERTICAL MANUAL CONTROL - Specific Rules VERTICAL MANUAL CONTROL means that either V/S, FPA, OPEN CLB, OPEN DES, EXP CLB or EXP DES mode (if EXP function is fitted) is engaged.

 (a)
 Effect on predictions There is no effect on MCDU flight plan predictions which do not take VERTICAL MANUAL CONTROL into account.

 (b)
 Effect on guidance

 -V/S, FPA, OPEN CLB, OPEN DES modes: Speed target is determined by the system if SPEED AUTO CONTROL is active: it is then equal to the ECON speed or holding speed. (Ref. Fig. 034)
 -EXP CLB or EXP DES mode (if pushbutton switch is fitted): The speed target is always determined by the FM as described in Para.B. when either mode is engaged. (in EXP CLB: max (VMAN, VLS); in EXP DES: min (VMAX, VMO-10, MMO-0.02)). (Ref. Fig. 035)

 (5)
 LATERAL MANUAL CONTROL - Specific Rules LATERAL MANUAL CONTROL means that either HDG, TRACK or RWY mode is engaged.

 (a)
 Effect on predictions Predictions always assume an immediate return to the lateral flight plan with a 45 deg. intercept law. Assumptions are as described for LATERAL AUTO CONTROL.

 (b)
 Effect on guidance

 -CLB, DES or FINAL mode is not available in LATERAL MANUAL CONTROL
 -V/S, FPA, OPEN CLB, OPEN DES mode:

 DES Mode in SPEED MANUAL CONTROL : Aircraft on Profile
 Figure 031

 DES Mode in SPEED MANUAL CONTROL : Aircraft above Profile
 Figure 032

 Display of SET SPD AUTO Message in Case
 of no Manual Speed Preselection for Next Phase
 Figure 033

 V/S in Descent (Aircraft above Profile)
 Figure 034

 INTENTIONALLY BLANK

 1 1

22-73-00Page 74
1 1 Config-1 Nov 01/02 1 1 1CES 1

 Expedite in Climb
 Figure 035

R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 22-73-00Page 75/76 1201-212, 1Config-1 May 01/05 1 1 1CES  If speed auto control is active, the target speed is the optimum speed limited by speed limit when applicable (speed and time constraints are not considered since they are related to the lateral path).

 -EXP CLB or EXP DES mode: The speed target is always determined by the FM when either mode is engaged. (in EXP CLB: max (VMAN, VLS); in EXP DES: min (VMAX, VMO-10, MMO-0.02)).
 -During Descent and Approach phases, the FMS computes the required distance to land (DIST TO LAND), the direct distance to destination (DIST TO DEST) for display on the PROGRESS page.
 Required distance to land:
 It is the distance required to pass from the A/C present energy
 state to the landing energy state (with respect to speed limit
 and final deceleration).

 Distance to destination:
 It is equal to the distance from the A/C present position to
 the LOC capture point (LCP) + distance from the LCP to the
 runway threshold. In case of non ILS approach, the LCP is
 replaced by the next to last approach waypoint.
 (Ref. Fig. 036, 037)

 Required Distance to Land - Distance to Destination
 Figure 036

 LATERAL MANUAL CONTROL in Descent
 Figure 037

 D. Other Computations
 (1) GW, FOB and CG Revision Rules The Gross Weight, the Fuel On Board and the Center of Gravity are displayed on the FUEL PRED page. (Ref. Fig. 038) These parameters correspond to current values. GW, FOB and CG are also used as initial conditions for all performance and prediction computation before engine start (if it is not available, no GW is used by default). The following references are used: ZFW = Zero Fuel Weight (displayed before engine start) ZFWCG = Center of Gravity of ZFW (displayed before engine start) FOBCG = Center of Gravity of FOB (function of FOB) CG = Center of Gravity of GW (displayed after engine start) TOGW = Takeoff Gross Weight (displayed before engine start). The following equations are always verified:
　
中國(guó)航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320飛機(jī)維護(hù)手冊(cè) AMM AUTO FLIGHT 自動(dòng)飛行3(103)