747-400 MAINTENANCE MANUAL
ROLL MODES OPERATE (GREEN) TO/GA
PITCH MODES OPERATE (GREEN) HDG HOLD
TO/GA VNAV PTH ROLL MODES ARMED HDG SEL ALT VNAV ALT
(WHITE) LNAV V/S G/S PITCH MODES ARMED (WHITE)
ROLLOUT LOC LNAV  ATT ROLLOUT LOC  VNAV SPD FLCH SPD  FLARE  G/S VNAV _________________________FLARE  HEADING SELECTED 
______STATUS 
(GREEN) FD _______  HDG  090 TRU 
CMD 
LAND 3 
<LAND 2> 
TEST  FD 
STATUS______ 
_______(AMBER) 
NO 
AUTOLAND 

245
FLIGHT SELECTED FLIGHT DIRECTOR DIRECTOR HEADING FAILURE FLAG COMMANDS
PRIMARY FLIGHT DISPLAY
CAPTAIN'S, FIRST OFFICER'S
AND NAVIGATION DISPLAY - AFDS LEFT AND CENTER
AUTOPILOT DISENGAGE SWITCH, GO-AROUNDS282,S283
E
SWITCHES, SEE H S2,S4 (S1,S3)
GO-AROUND LEVER
RIGHT GO-AROUND SWITCH, S6 (S5)
SEE I THRUST LEVER 3 NOTE:____ A/P DISENGAGE SWITCH (THRUST LEVER 2) ON FIRST OFFICER'S
SWITCH GO-AROUND SWITCHES
CONTROL WHEEL IS
PLATE
LOCATED ON RIGHT
G
OUTBOARD HANDLE. SCREW SWITCH
AUTOPILOT
AUTOPILOT DISENGAGE SWITCH
MOUNTING
DISENGAGE SCREWS
F SWITCH H
Autopilot/Flight Director System - Component Locations
Figure 1 (Sheet 3)

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MAINTENANCE MANUAL

 (2)  
INTERLOCK

 (a)  Five pins are provided to prevent the use of FCCs with incompatible part numbers.

 (3)  
OPTION GROUP 1

 (a)  The five binary coded customer option pins define the particular customer's performance requirements. For example, gains or limits are changed from standard values.

 (4)  
OPTION GROUP 2

 (a)  
Autopilot Mode Engage

 1)  The autopilot will engage into the current F/D modes (with the exception of takeoff or go-around) when it is initially placed in CMD. If the flight directors were off or the F/D modes were TO or G/A, the A/P modes will initially be V/S and HDG HOLD. G/S and LOC active modes transition to V/S and HDG HOLD and the glideslope and localizer will be rearmed.

 (b)  
Full-Time No Land 3
 1) The autoland capability is displayed full-time.

 (c)  
Method 1/Method 2

 1)  After APP mode is selected all off-line channels automatically arm for multi-channel operation and dot-bar matrices on the A/P ENGAGE CMD switch/lights illuminate.

 (d)  
Lateral Command Engage Option (LCEO)

 1)  When the autopilot is engaged in CMD or the F/D is turned ON, the A/P or F/D engages into HDG HOLD mode.
 (5)  OPTION GROUP 3
 (a)  
Full Time F/D

 1)  The F/D command bars are displayed if either or both flight directors are turned on regardless of A/P channel engagement.

 (b)  
F/D Auto On

 1)  This provides for automatic F/D selection following a Go-Around initiated during a manual approach.

 (c)  
F/D Display on ROLLOUT 1) F/D commands not displayed during ROLLOUT engage mode.

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747-400
MAINTENANCE MANUAL

 (6)  OPTION GROUP 4
 (a)  Single Source Autopilot
 1)  Autopilot will engage (single channel only) with only one valid source of stab position and only one source of IRS data, only if that channel was a valid local stab position and valid local IRS data.
 (7)  
PARITY

 (a)  The parity pin provides odd parity for the total of program pin ground connections to meet ARINC 429 standards.

 (8)  
Channel Identification

 (a)  Two pin connections on each FCC shelf identify the FCC channnel as L, C, or R.
　
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