S 812-040-N00
(2)
Do these steps to get access to the CMCS messages.
(a)
Find the <71 POWER PLANT prompt.
(b)
Push the line select key adjacent to the <71 POWER PLANT prompt.
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73-21-00
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S 812-019-N00
(3)
Look at the flight leg (LEG:) of the messages that you find.
S 812-020-N00
(4)
Ignore all messages that do not show on a minimum of two of the last three flight legs (-00, -01, -02).
S 812-041-N00
(5)
AIRPLANES WITH CMC S/W -009; If CMCS fault messages 7X927 ENG-X EEC SYSTEM TIME LIMITED DISPATCH FAULT CATEGORY 2 is the remaining message, then do the corrective action in FIM 71-CMCS Message Index.
NOTE: The X in the CMCS fault message is 1, 2, 3, or 4.
____
S 812-039-N00
(6) AIRPLANES WITH CMC S/W -010; If CMCS fault messages 7X927 ENG-X CATEGORY 2 FAULT TIME LIMITED DISPATCH ENGINE CONTROL SYSTEM is the remaining message, then do the corrective action in FIM 71-CMCS Message Index.
NOTE: The X in the CMCS fault message is 1, 2, 3, or 4.
____
S 812-022-N00
(7) If CMCS fault messages 7X927 or 7X928 are not one of the remaining messages, then no corrective action is necessary (the remaining messages are Other Maintenance Items).
TASK 73-21-00-862-015-N00
3. Change the EEC Channel (While the Engine Operates)
__________________________________________________
A. Access
(1)
Location Zone
221 and 222 Control Cabin
B.
Procedure
S 862-014-N00
(1)
To change the command channel from channel A to channel B, open these circuit breakers on the applicable engine and attach DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel
1) 6F15 ENG 1 PERF SOL PWR A/APU ENG START
or ENG 1 PERF SOL PWR A
2) 6E15 ENG 2 PERF SOL PWR A
3) 6D15 ENG 3 PERF SOL PWR A
4) 6C15 ENG 4 PERF SOL PWR A
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 862-025-N00
(2)
To change the command channel from channel B to channel A, open these circuit breakers on the applicable engine and attach DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel
1) 6F16 ENG 1 PERF SOL PWR B
2) 6E16 ENG 2 PERF SOL PWR B
3) 6D16 ENG 3 PERF SOL PWR B
4) 6C16 ENG 4 PERF SOL PWR B
S 862-017-N00
(3)
After you do the test or the maintenance procedure, remove the DO-NOT-CLOSE tags and close the applicable circuit breakers:
(a)
P6 Main Power Distribution Panel 1) 6F15 ENG 1 PERF SOL PWR A/APU ENG START
or ENG 1 PERF SOL PWR A 2) 6F16 ENG 1 PERF SOL PWR B 3) 6E15 ENG 2 PERF SOL PWR A 4) 6E16 ENG 2 PERF SOL PWR B 5) 6D15 ENG 3 PERF SOL PWR A 6) 6D16 ENG 3 PERF SOL PWR B 7) 6C15 ENG 4 PERF SOL PWR A 8) 6C16 ENG 4 PERF SOL PWR B
TASK 73-21-00-862-018-N00
4. Change the EEC Channel (After an Engine Shutdown)_________________________________________________
A. Access
(1)
Location
221 and 222 Control Cabin
B.
Change the EEC Command Channel
S 862-019-N00
(1)
Set the applicable EEC MAINT ENG 1,2,3, or 4 POWER switch on the EEC MAINT module on the P5 overhead panel to the TEST position.
S 862-020-N00
(2)
To change the command channel from channel A to channel B, open these circuit breakers for the applicable engine and attach DO-NOT-CLOSE tags:
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