(b)
The data that follows is shown on one or more message pages, as indicated in parentheses: 1) A CMCS fault message (all message pages) 2) The number of the CMCS fault message (all message pages) 3) The ATA chapter associated with the CMCS fault message (all
message pages)
4) The date and time (GMT) of the occurrence of the CMCS fault message (present leg and fault history message pages)
5) The flight leg during which the fault became active (fault history message page)
6) The equipment number, if there is one, associated with the CMCS fault message (all message pages)
7) A indication of whether the fault is active (present leg and existing faults message pages)
8) The flight phase during which the fault first became active (present leg and fault history message pages)
9) An indication of whether the fault is hard, intermittent, non-determined, or N/A for non-applicable (present leg and fault history message pages)
10) A FDE, if there is one, that is correlated to the CMCS fault message (all message pages that show a FDE)
11) An indication of whether the FDE, if there is one, is shown on the EICAS display (all message pages that show a FDE)
12) The <READ SNAPSHOT prompt, if there is a maintenance page snapshot that is related to the flight deck effect (all pages that show a FDE)
13) The <DIAG CODE prompt, if the CMCS message is from the flight control computer (FCC). When you push the adjacent key, the FCC diagnostic codes show. The L, C, or R of the diagnostic code shows which FCC (left, center, or right) sent the code. An A after the diagnostic code shows that the fault is an avalanche fault. An avalanche fault is one step away from a fault that will cause the autopilot to disconnect.
(c) Flight Leg (Fig. 9)
1) A flight leg normally starts with the airplane on the ground when the first engine starts. But if the engines are not shut down from the previous flight, the next flight leg starts when the last door goes from open to closed. When one flight leg ends and the next flight leg starts, a flight leg transition occurs. There is no time gap between flight legs.
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2) The left and right IRU or the left and center IRU must be on before the flight leg transition can occur. A flight leg transition is also referred to as a flight leg roll.
3) The next flight leg cannot start until it is enabled in one of these two ways: a) The next flight leg is automatically enabled when the
CMC gets the engine take-off thrust discrete with the parking brake released, or b) The next flight leg is manually enabled with the ENABLE FLT LEG ROLL selection on the OTHER FUNCTIONS menu.
NOTE: Leaving the following circuit breakers on the P6
____ panel open for at least 5 minutes simulates the logic for engines running. If these circuit breakers are open for 5 minutes and the IRUs are on, a flight leg transition can occur when the last door closes.
6L10 ENG 1 FUEL CONT VALVE 6L11 ENG 2 FUEL CONT VALVE 6L12 ENG 3 FUEL CONT VALVE 6L13 ENG 4 FUEL CONT VALVE
4) The CMCS numbers the present flight leg -00. Previous flight legs are numbered -01, -02, -03, etc., counting backwards in time from the present flight leg.
(d) Flight Phase
1) The flight phase in which a fault occurred is shown on two types of message pages: the PRESENT LEG FAULTS page and the FAULT HISTORY MSG page. The flight phase is shown as a code. The corresponding flight phase names are shown in Table 1.
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~.......................................
| FLIGHT PHASE CODE | FLIGHT PHASE NAME |
.........................................
| PO | POWER ON |
| PF | PRE FLIGHT |
| ES | ENGINE START |
| TA | TAXI-OUT |
| TO | TAKEOFF |
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