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747-400
MAINTENANCE MANUAL

 S 714-028
 (12) Make sure the fill indicator for the reservoir quantity (in the left wheel well for the body landing gear) shows the correct indication for the applicable system:
 System #________ Indication
 1 0.50 to 0.75

 2 0.80 to 1.05

 3 0.80 to 1.05

 4 0.50 to 0.75

 S 714-029
 (13) Make sure the EICAS status display shows the correct indication for the applicable hydraulic system:
 System #________ Indication
 1 0.50 to 0.75

 2 0.80 to 1.05

 3 0.80 to 1.05

 4 0.50 to 0.75

 S 864-019
 (14)
 Pressurize the pneumatic system (AMM 36-00-00/201).

 S 794-020

 (15)
 Make sure there is no leakage at the transmitter (1) or the drain valve.

 S 364-021

 (16)
 If you find leakage, repair the cause of the leakage.

 S 434-037

 (17)
 Safety the bolts (4) with a lockwire.

 S 864-023

 (18)
 Remove the electrical power if it is not necessary (AMM 24-22-00/201).

 S 214-024

 (19)
 Examine the doors on the trailing edge fairing:

 (a)  
Examine the latches on the doors in the trailing edge fairing for cracks and wear.

 (b)  
Make sure all the latches are there.

 (c)  
Repair and adjust the latches if it is necessary
 (AMM 54-62-02/501).

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747-400 MAINTENANCE MANUAL
 S 414-025
 CAUTION:_______ MAKE SURE YOU LATCH THE DOORS ON THE TRAILING EDGE FAIRING
 CORRECTLY.  IF THE DOORS OPEN DURING A FLIGHT, THIS CAN CAUSE
 DAMAGE TO THE DOORS.

 (20)
 Close the doors in the trailing edge fairing (AMM 54-62-00/201).

 S 844-038

 (21)
 Perform a servicing on the hydraulic reservoir before the airplane goes back into service (AMM 12-12-01/301).

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747-400 MAINTENANCE MANUAL
 HYDRAULIC QUANTITY INTERFACE MODULE (HYQUIM) - REMOVAL/INSTALLATION
___________________________________________________________________
 1.  General_______
 A.  This procedure has two tasks. The first task removes the hydraulic quantity interface module (referred to as the HYQUIM). The second task installs the HYQUIM.
 B.  The HYQUIM is an electronic module. This electronic module is on the E2 electronic rack in the main equipment center.
 TASK 29-33-02-004-001
 2.  Hydraulic Quantity Interface Module (HYQUIM) Removal (Fig. 401)____________________________________________________
 A.  References
 (1)  
AMM 20-11-22/401, E/E Rack Mounted Components

 B.  
Access

 (1)  
Location Zone
 118 Main Equipment Center

 C.  
Procedure

 S 864-002
 (1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P7 Overhead Circuit Breaker Panel.
 1) 7G04 HYDRAULICS FLUID QTY

 (b)  
P414 main power distribution panel.
 1) E25 HYD FLUID QTY IND

 S 024-003
　
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