ECAM DUs - Normal/Alternate Inputs Control
Figure 009
1EFF : 106-149, 303-399, 1 31-68-00Page 20 1 1 Config-3 Aug 01/05 1 1 1CES 1 -------------------------------------------------------------------------------|CASE|DMC1/2/3| CREW | DISPATCHING OF ECAM IMAGES : | | NR |CONDITN |TRANSFER | DU INPUT (N or A) - SOURCE DMC and | | | |SELECTION| ECAM PROCESSOR OPERATING MODE(E/W - S - MONO ) | | | | |------------------------------------------------------| | | | CAPT ND | UP ECAM DU | LO ECAM DU | F/O ND | -------------------------------------------------------------------------------| | | | |(DU failed) |DMC2 in MONO| | | 7 | NORM |ECAM/ND | ND | X | E/W (A) | S (N) | | | | F/O | |(DU failed) |DMC1 in E/W | DMC2 in S | | 8 | NORM | ECAM/ND | S (N) | X | E/W (N) | ND | | | | CAPT | DMC1 in S |(DU failed) | DMC2 in E/W| | | 9 | NORM | NORM | ND | E/W (N) | X | ND | | | | | |DMC1 in MONO|(DU failed) | | | 10 | NORM | ECAM/ND | ND | E/W (N) | X | S (N) | | | | F/O | |DMC1 in E/W |(DU failed) | DMC2 in S | | 11 | NORM | ECAM/ND | S (N) | E/W (A) | X | ND | | | | CAPT | DMC1 in S |DMC2 in E/W |(DU failed) | | | 12 | NORM | ECAM/ND | ND | X | X | E/W (N) | | | | F/O | |(DU failed) |(DU failed) | DMC2 in MONO | | 13 | NORM | ECAM/ND | E/W (N) | X | X | ND | | | | CAPT |DMC1 in MONO|(DU failed) |(DU failed) | |
1EFF : 106-149, 303-399, 1 31-68-00Page 21 1 1 Config-3 Aug 01/05 1 1 1CES 1 At last, the following table gives the operational consequences after the loss of one or several EIS items of equipment.
------------------------------------------------------------------------------| FAILURE | OPERATIONAL CONSEQUENCE | |-------------|--------------------------------------------------------------| | 1DMC | NO | |-------------|--------------------------------------------------------------| | 2DMCs | - Loss of PFD and ND images on either CAPT or F/O instrument | | | panel. | | | - Loss of ECAM System/Status image (possibility to display | | | a System or Status image temporarily). | |-------------|--------------------------------------------------------------| | 1 EIS DU | Loss of ND image on the corresponding main instrument panel. | | | Possibility to get the ND image back by means of the PFD ND | | | XFR P/BSW. | |-------------|--------------------------------------------------------------| | FCU single | In case of FCU channel 1 (or 2) failure, the DMCs still | | failure | receive the FCU channel 2 (1) information, which carries | | | along all the CAPT and F/O selections. There is an automatic | | | switch over inside the FCU. | |-------------|--------------------------------------------------------------| | UPPER ECAM | Automatic transfer of the Engine/Warning (E/W) image on the | | DU | lower ECAM DU and subsequent loss of the System/Status | | | image. | | | - Possibility to display the S image temporarily instead of | | | the E/W image when a key is pressed on the ECAM control | | | panel. | | | - Possibility to display the S image permanently on either | | | ND instead of the ND image by means of the ECAM/ND XFR | | | selector switch. | |-------------|--------------------------------------------------------------| | LOWER ECAM | Loss of the S image. Possibility to get it back temporarily | | DU | or permanently (same as above). | |-------------|--------------------------------------------------------------| | BOTH ECAM | Loss of Engine/Warning and System images. Possibility to | | DUs | have the Engine/Warning image displayed on either ND by | | | means of the ECAM/ND XFR selector switch. Possibility to | | | display momentarily the S image instead of the E/W image. | |-------------|--------------------------------------------------------------| | | In case of an electronic failure concerning the ECAM CP, the | | | following functions remain available : ALL, CLR, RCL, CANC, | | | since the corresponding keys are directly wired to the DMCs. | | | By means of the ALL key, the pilot can access any A/C System | | | image. | |-------------|--------------------------------------------------------------|
1EFF : 106-149, 303-399, 1 31-68-00Page 22 1 1 Config-3 Aug 01/05 1 1 1CES 1
NOTE : When there is only one DU left for the ECAM display, priority
____ is given to the E/W image display. However, should any monitored parameter exceed its corresponding ADVISORY threshold, the ADV white message flashes on the lower part of the E/W image. On the ECAM CP, the key of the affected A/C system flashes in order to enable the pilot to find it easily and to consult the corresponding system image temporarily if he presses the key.
D. Switching of the DMC Output Buses The DMCs transmit data on two ARINC 429 buses : one high speed switched bus and one low speed unswitched bus. Switched means : when a pilot sets the EIS DMC selector switch to CAPT/3 (or F/O/3), the DMC 1 (or DMC 2 respectively) sends through its output bus the data received from the DMC 3, instead of its own data.
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