CODE 79 FROM THE RIGHT FCC IS AN AVALANCHE
WHEN YOU PUSH FAULT
THE ADJACENT
KEY, THE FCC
DIAGNOSTIC

<>AUTOPILOT
CODES SHOW

DIAG CODE L67 C78 R79ACODE 67 FROM <RETURN
THE LEFT FCC CODE 78 FROM THE CENTER FCC

Message Page
Figure 8 (Sheet 1)

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C20109
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747-400
MAINTENANCE MANUAL

THE ASTERISK (*)
SHOWS THAT THE
FAULT IS ACTIVE.

FLIGHT PHASE DURING WHICH THE FAULT OCCURRED
DATE AND GMT THAT THE FAULT FIRST OCCURRED THIS INDICATION SHOWS THE ASTERISK (*)
IF THE FAULT IS HARD SHOWS THAT THE
(HRD), INTERMITTENT (INT), FLIGHT DECK EFFECT
OR NON-DETERMINED (BLANK). IS SHOWN ON THE
N/A ALWAYS SHOWS FOR EICAS DISPLAY.
ENGINE MESSAGES.
IF THE FLIGHT CONTROL COMPUTER
MADE THE CMCS MESSAGE,
"DIAG CODE" SHOWS HERE.
PUSH THE ADJACENT KEY TO SEE
THE DIAGNOSTIC CODE OR CODES
RELATED TO THE CMCS MESSAGE.

THE ASTERISK (*)
SHOWS THAT THE
FAULT IS ACTIVE.

THE ASTERISK (*)
SHOWS THAT THE
FLIGHT DECK EFFECT
IS SHOWN ON THE
EICAS DISPLAY.

FLIGHT LEG DURING WHICH THE FAULT BECAME ACTIVE

THIS INDICATION SHOWS FAULT FIRST OCCURRED DATE AND GMT THAT THE IF THE FAULT IS HARD (HRD), INTERMITTENT (INT), OR NON-DETERMINED (BLANK). N/A ALWAYS SHOWS FOR ENGINE MESSAGES.

FLIGHT PHASE DURING WHICH THE FAULT OCCURRED
____THE MESSAGE PAGES FOR PRESENT
NOTE: LEG FAULTS, EXISTING FAULTS, AND FAULT HISTORY ARE DIFFERENT FROM THE MESSAGE PAGE FOR GROUND TESTS AS SHOWN.
Message Page
Figure 8 (Sheet 2)

C20133
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A
747-400
MAINTENANCE MANUAL

TAKE-OFF (T/O) THRUST  T/O THRUST  T/O THRUST 
WITH PARKING BRAKE  WITH BRAKE  WITH BRAKE 
RELEASED ENABLES A  RELEASED  RELEASED 
FLIGHT LEG TRANSITION 
THE NEXT TIME THE FIRST 
ENGINE IS STARTED 
NORMAL FLIGHT LEG TRANSITION 
NOTE:____  TT  = TRANSITION TIME 
ET  = ENABLE TIME 

Flight Leg Logic
Figure 9 (Sheet 1)

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A00902
A

747-400
MAINTENANCE MANUAL

YOU MUST PUSH THE LSK
FIRST FIRST ADJACENT TO "ENABLE
ENGINE ENGINE  ENGINE
FLT LEG ROLL>" SO
START RUN  START

THAT A FLIGHT LEG TRANSITION CAN OCCUR

INHIBIT FLT LEG ROLL>

T/O THRUST ENABLE FLT T/O THRUST WITH BRAKE LEG ROLL> WITH BRAKE RELEASED RELEASED
FLIGHT LEG TRANSITION DISABLED FOR MAINTENENCE
Flight Leg Logic
Figure 9 (Sheet 2)

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A00917
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747-400
MAINTENANCE MANUAL

Present Leg Faults
Figure 10 (Sheet 1)

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