(2) Indicating The various indications and warnings linked to the AP/FD system are as follows:
(a)
Guidance orders delivered by the FDs presented on the center section of the PFD.
(b)
AP/FD engagement indicated on the FMAs (upper section of the PFDs).
(c)
AP/FD modes displayed on the FMAs (pushbutton switches or
specific indicator lights on the FCU come on).
(d)
Automatic landing capabilities displayed on the FMAs.
(e)
AP loss indicated by:
-
a message displayed on the upper display unit of the ECAM system
-
a cavalry charge aural warning through the loudspeakers
-
illumination of the MASTER WARN lights on the panels 130VU and 131VU (glareshield)
-
illumination of the AUTO LAND lights (panels 130VU and 131VU/glareshield) if loss occurs below 200 ft. in automatic landing.
(f)
Loss of AP availability and various landing capabilities indicated by messages displayed on the lower display unit of the ECAM system.
(g)
Excessive deviations indicated by LOC and GLIDE indexes flashing on the PFDs and NDs. This warning is accompanied by the AUTO LAND lights which come on for excessive deviations below 200 ft. in automatic landing.
NOTE : The DMCs deliver the information to the EFIS display
____ units. The warnings of the ECAM system and those on the glareshield are generated by the FWCs.
4. Operation
_________
A. AP/FD Engagement
(1)
AP engagement The AP can be engaged only after takeoff. In cruise, one AP only can be engaged ; in ILS approach (landing and roll out included) and in go around, the two APs can be engaged. The AP is engaged by means of the AP1 and AP2 pushbutton switches located on the FCU. In dual-AP operation, the AP1 is active, the AP2 is in standby. With one AP engaged, the controls (side stick controllers and rudder pedals) have an increased load threshold.
(2)
FD engagement The flight director is engaged automatically when the aircraft electrical network is energized. The FD1 orders generated by the FMGC1 control the FD symbols of the CAPT PFD (PFD1) through the DMCs. The FD2 orders generated by the FMGC2 control the FD symbols of the F/O PFD (PFD2). In case of FMGC failure, the remaining FMGC controls the two PFDs.
The FD orders on the PFDs can be cancelled by means of the FD
pushbutton switches located on the FCU. An FD remains engaged as long
as its orders are displayed at least on one PFD.
The FD orders can be displayed in two ways as a function of the
HDG-V/S/TRK FPA selection made on the FCU.
(Ref. Fig. 005)
B. AP/FD Modes
(1)
Mode selection principle A mode can be selected through one of the following possibilities:
-automatically, e.g. the altitude acquisition mode is always armed except in some cases (approach)
-action on a pushbutton switch located on the FCU
-push or pull action on one of the reference selection knobs (speed/ Mach, heading/track, altitude, vertical speed/flight path angle) on the FCU
-cancellation of an engaged mode
-position of the throttle control levers (selection of takeoff and go around modes).
(2)
Cruise modes
The table below presents the cruise modes.
Different FD Orders Figure 005
1EFF : 1 1R 1CES ALL 1 11 1 22-10-00 Page 12 Aug 01/05
------------------------------------------------------------------------------| MODE |AVAILABILITY| PHASES | NOTE
--------------|---------------------------|------------|--------|-------------| | | | --| - Vertical speed (V/S) | AP/FD | HOLD | | V/S-FPA | (acquisition and hold) | | | | P/BSW | - Flight path angle (FPA) | AP/FD | HOLD | | | (acquisition and hold) | | | --
LONGITUDINAL | - Altitude acquisition | AP/FD |ARM-CAPT| Armed | (ALT ACQ) | | |automatically | - Altitude hold (ALT) | AP/FD | HOLD | Automatic | - Descent | | | --| DES | AP/FD |ARM-HOLD| | | OP DES | AP/FD | HOLD | | Altitude | - Climb | | | | P/BSW | CLB | AP/FD |ARM-HOLD| | | OP CLB | AP/FD | HOLD | | | | | | --| - Expedite (EXP) | AP/FD | HOLD | EXPED P/BSW
--------------|---------------------------|------------|--------|-------------| | | | --| - Heading hold (HDG) | AP/FD | HOLD | | Lat | - TRACK | AP/FD | HOLD | | selector | | | | -- (pulled)
LATERAL | - Navigation (NAV) | AP/FD |ARM-HOLD| Lat selector | | | | (pushed) ------------------------------------------------------------------------------
(3) Common modes (TAKEOFF, LANDING)
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