(2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 36-00-00/201, Pneumatic Power

 (4)  
AMM 27-51-00/501, Trailing Edge Flap System

 (5)  
SSM 27-51-01

 (6)  
WDM 27-51-11

 B.
Access

 (1)  
Location Zone
 117 Main Equipment Center, LH
 118 Main Equipment Center, RH

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747-400 MAINTENANCE MANUAL
 C. Install the Flap Control Unit
 S 424-005
 (1)  
Install the flap control unit on the shelf.

 S 864-006

 (2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7C10, FLT CONT ELEC 2L AC
 2) 7C11, FLT CONT ELEC 2L DC
 3) 7C12, FLT CONT ELEC 1L AC
 4) 7C13, FLT CONT ELEC 1L DC
 5) 7C14, FLT CONT ELEC 1R AC
 6) 7C15, FLT CONT ELEC 1R DC
 7) 7C16, FLT CONT ELEC 2R AC
 8) 7C17, FLT CONT ELEC 2R DC

 D.
Operational Test - Flap Control Unit

 S 864-007
 (1)  
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 S 744-009

 (2)
Do this task: Ground Test - Flap Control Units (AMM 27-51-00/501):

 (a)  
Push the GROUND TESTS on the CMC main menu.

 (b)  
Push 27 FLAP CONTROL UNIT on the CDU.

 (c)  
Push the applicable FLAP CONTROL -L, -C, or -R test for the flap control unit. 1) Make sure that PASS is shown for the applicable flap

 control unit.
 S 864-011
 (3)  
Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).

 (4)  
Do this task: "Supply Pneumatic Power" (AMM 36-00-00/201).

 S 864-012
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 (5)  S 714-013Make sure the flaps move through the full travel: (a) Put the flap control lever in the 30-unit detent. 1) Make sure the flaps extend to the 30-unit position on the main EICAS. 2) Make sure there are no flaps system EICAS messages shown. (b) Put the flap control lever in the UP detent. 1) Make sure the flaps are fully retracted on the main EICAS.
 (6)  S 864-015Do this task:  "Remove Pneumatic Power" (AMM 36-00-00/201).
 (7)  S 864-014Do this task:  "Remove Hydraulic Power" (AMM 29-11-00/201).
 (8)  S 864-010Do this task:  "Remove Electrical Power" (AMM 24-22-00/201).

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 1.

2.

3.

4.

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747-400 MAINTENANCE MANUAL
 TRAILING EDGE FLAP POSITION INDICATING SYSTEM -
_______________________________________________ DESCRIPTION AND OPERATION
_________________________
General
_______
 A.  The trailing edge flap position indicating system provides visual indication on the flight deck of the displacement of the trailing edge flaps. The FLAPS display appears on the main EICAS whenever the flap lever is not in the full UP detent or any flap is not fully retracted.
 B.  Components used by the trailing edge flap position indicating system are the 6 TE flap position RVDT transmitters, the TE flap actuator (with integral RVDT transmitter), the 3 flap control units, and the EIU's and EICAS display. The system is powered through the flap control units by the 4 FCE power supply modules (Ref 27-09-00).
　
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