(2)  
The operational test of the autopilot/flight director system does a check of the Existing Faults, the Mode Control Panel and the Autopilot Engage/Disengage Operation.

 B. References
 (1)  
AMM 22-11-01/401, Flight Control Computer

 (2)  
AMM 22-11-02/201, AFCS Mode Control Panel

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (5)  
AMM 34-21-00/201, Inertial Reference System

 (6)  
AMM 34-61-00/501, Flight Management Computer System

 (7)  
AMM 34-61-02/401, Control Display Unit

 (8)  
AMM 45-10-00/501, Central Maintenance Computer System

 C. Access
 (1)  Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 D. Preconditions
 S 865-444
 (1)  These conditions are necessary for this task:
 (a)  
Electric Power On (AMM/24-22-00/201).

 (b)  
Central Maintenance Computer (CMC), serviceable (AMM 45-10-00/501).

 (c)  
IRUs must be in the NAV mode (AMM 34-21-00/201).

 (d)  
Hydraulic Pressure Supplied (AMM 29-11-00/201).

 (e)  
Pilot's Overhead Maintenance Panel (P461), serviceable.

 (f)  
Mode Control Panel (MCP), installed (AMM 22-11-02/201).

 (g)  
Flight Control Computer (FCC), serviceable (AMM 22-11-01/401).

 (h)  
Control Display Unit (CDU), serviceable (AMM 34-61-02/401).

 (i)  
Flight Management Computer (FMC), serviceable (AMM 34-61-00/501).

 E. Prepare for the Operational Test
 S 865-422
 (1)  Supply electrical power (AMM 24-22-00/201).
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G.
H.
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747-400 MAINTENANCE MANUAL
 S 865-291
 (2)  Align the left, center and right IRUs in the NAV mode (AMM 34-21-00/201).
 S 865-424
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (3)  
Supply the hydraulic pressure to the hydraulic systems NO. 1, 2, 3, and 4 (AMM 29-11-00/201).

 S 865-426

 (4)  
Make sure the FLT CONTROL HYD POWER TAIL 1, 2, 3, and 4 switches are in the NORM position. These switches are on the Pilots' Overhead Maintenance Panel (P461).

 S 865-428

 (5)  
Make sure the FLT CONTROL HYD POWER WING 1, 2, 3, and 4 switches are in the NORM position. These switches are on the Pilots' Overhead Maintenance Panel (P461).

Existing Faults
 S 745-077
 (1)  
Push the line select key (LSK) adjacent to <EXISTING FAULTS from the CMC MENU page on the CDU.

 S 745-078

 (2)  
Make sure that <22 AUTOPILT FLT DIR does not show on the EXISTING FAULTS MENU page on the CDU.

 NOTE: If no failure occurs, <22 AUTOPILOT FLT DIR does not show on
____
 the EXISTING FAULTS MENU page.

Mode Control Panel
 S 745-166
 (1)
Do this task: Ground Test - Mode Control PanelAutopilot Engage/Disengage Operation

 (1)  
Make sure the radio altitude display on the PFD is less than 2 feet.

 S 865-084

 (2)  
Make sure the STAB TRIM 2 and 3 switches on the pilots' control wheel stand are in the AUTO position.

 S 865-083
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747-400 MAINTENANCE MANUAL
 S 865-085
 (3)  
Push the A/P ENGAGE L CMD button on the MCP.
　
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