(b)
Manual and automatic control is provided to select the function of each DU. Manual and automatic switching is also provided to select which EIU provides data for the EICAS, CAPT'S EFIS and the F/O'S EFIS. Manual controls are provided to select the system source data for the EFIS.
(2)
Display Function Switching
(a) General
1) The following describes the functional switching logic for the display unit personalities which occur automatically due to the failure of the CAPT'S or F/O'S outboard DUs, or the center, upper DU.
2) The functional switching logic for the DU personalities which occur manually due to crew selection through the CAPT'S or F/O's INBD CRT and LWR CRT selector switches located above the CAPT'S and F/O's inboard DU's is also discussed.
3) Normally, the personalities of the DU's, as located on the forward panel, are as indicated below:
Left outboard DU -Captain's PFD Left inboard DU -Captain's ND Upper DU -Main EICAS Lower DU -Auxiliary EICAS Right inboard DU -First officer's ND Right outboard DU -First officer's PFD
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INPUT BUS
INPUT BUS M7352 C-EIU (E2-6)
EIU-R-A-1
INPUT BUS
M7351 R-EIU
(E2-6)
-#12 SPOILER POSN -#4 SPOILER POSN -ACARS DATA -ADF BEARING, FREQ -AFT, FWD CARGO TEMP -AILERON POSN -ANGLE OF ATTACK -APU STARTS, START ABORTS -BARO SELECT IN/HPA -BLEED AIRFLOW SNSR 1-4 -BLEED PRESSURE SNSR 1-4 -BLEED TEMP ENG 1-4 -BRAKE TEMP 1-16 -BRAKE TEMP WHEEL 1-16 -BROADBAND VIB 1-4 -BULK CARGO TEMP -CABIN PRESSURE -CENTER OF GRAVITY -CMC PROMPTS -CMC TEST COMMANDS -CMU MAINT WORD -COLUMN POSN -COMP 1-3 OUTLET TEMP -CONFIG WARN MAINT WORD -CONFIG WARN STAT WORD -CONT BULB TEMP -CONTROL WHEEL INPUT -CORRECTED STAB POSN -DH SELECT -DISCRETE DATA -DME DISTANCE, FREQ -EFIS DISCRETES -EGT DATA -EICAS DISCRETES -EICAS MESSAGES -EICAS SYNOPTIC DATA -ELEVATOR POSN -FAN IMBAL ANGLE 1-4 -FAULT HISTORY 1-4 -FAULT WORDS 1-20 -FJCC DATA -FLAP LEVER POSN -FLAP POSN -FLIGHT DECK TEMP -FMC DATA -FUEL QUANTITY, TEMP -FUEL TO REMAIN -GND TEST WORD -GROSS WEIGHT -H20 SEP DELTA PRESS -HIGHWINS VIB 1-4
B584 DATA MANAGEMENT UNIT (E1-3)
-HYD SYS 1-4 QUANTITY -HYD SYS 1-4 PRESS -HYD SYS 1-4 STATUS -HYD SYS 1-4 TEMP -L,R MANIFOLD PRESS -LANDING ALTITUDE -LANDING GEAR DATA -LPT IMBAL ANGLE 1-4 -LWR, UPR RRC DATA -LWR, UPR RUDDER POSN -MAINT DISCRETES -MAINT MESSAGES -MDA SELECTED -MES CYCLES -N1,N2,N3 DATA 1-4 -NAC TEMP -OIL QUANTITY -OPERATING HOURS -PACK 1-3 DATA -PITCH DATA -PRIM HX 1-3 IN, OUT TEMP -PRIM, SEC AIRSPEED, MACH -PTC BULB, TEST DATA -RAI, RAE DOOR POSN 1-3 -RECIRC FAN DATA -SCID 1-4 MAINT WD, STAT -SEC HX 1-3 IN, OUT TEMP -SELECTED COURSE -SPEED BRAKE DATA -SRM DATA -STABILIZER POSN -STICK SHAKER ANGLE -SWMM MAINT WD, STAT -TAXI SPEED -TBV POSN 1-3 -TCAS DATA -TIME TO JETT COMPLETE -TIRE PRESSURE 1-18 -TORQUE OUTPUT 1-16 -UPPER DECK TEMP -VMIN -VMX-VFE/VLE -VOR BEARING -VOR FREQUENCY -VSSING -WXR DATA -ZERO FUEL C OF G -ZERO FUEL WEIGHT -ZONE A-H TEMP -ZONE TRIM AIR FLOW -ZONE TRIM AIR PRESS
Airplane Condition Monitoring System (ACMS) Interface
Figure 81
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4) For a self-detected DU failure, the DU screen will blank and the main EICAS display will indicate an advisory level EICAS message of "IDS CRT".
(b) Automatic Switching
1) Outboard DU (PFD) failure:
a) If the CAPT'S or F/O's PFD fails, the respective inboard DU (ND) switches to function as a PFD. If required, an ND may be manually selected on the lower DU.
b) Upon recovery of the outboard DU, both the outboard and inboard DUs will return to their normal functional operation.
2) Upper DU (main EICAS) failure:
a) If the main EICAS fails, then the lower DU (auxiliary EICAS) switches to function as a main EICAS. If required, an auxiliary EICAS may be manually selected on an inboard DU.
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