E.
Procedure

 S 642-029
 (1)  
Lubricate all the packings and the component threads with hydraulic fluid.

 S 422-030

 (2)  
Install the filter element for the case drain:

 (a)  
Install the packing (25) on the magnetic plug (26).

 (b)  
Install the magnetic plug (26) in the case. 1) Install a lockwire on the magnetic plug.

 (c)  
Install the packing (28) in the groove in the upper surface of the filter element (27).

 (d)  
Install the filter element (27) on the fitting in the module.

 (e)  
Install the filter case (22).

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747-400 MAINTENANCE MANUAL
 (f)  Hand tighten the case (22) and install a lockwire.
 S 862-035
 (3)  
Pressurize the hydraulic system with the EDP or the DEMAND pump (AMM 29-11-00/201).

 S 792-074

 (4)  
Examine the case drain module for leakage.

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

 S 862-036
 (5)  Release the pressure in the hydraulic system if it is not necessary for other operations (AMM 29-11-00/201).
 S 412-038
 CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
 (6)  Close the fairing doors on the trailing edge of the applicable strut (AMM 54-62-00/201).
 TASK 29-11-18-002-039
 6. Case Drain Module Check Valve Removal (Fig. 201)
_____________________________________
 A. References
 (1)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (2)  
AMM 36-00-00/201, Pneumatic System

 (3)  
AMM 54-62-00/201, Nacelle Strut Access Panels

 (4)  
IPC 29-11-18 Fig. 1

 B.
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 464 System 2 - Strut Aft Fairing
 474 System 3 - Strut Aft Fairing
 484 System 4 - Strut Aft Fairing

 (2)  
Access Panel
 454AL Strut Aft Fairing Doors - System 1
 464AL Strut Aft Fairing Doors - System 2
 474AL Strut Aft Fairing Doors - System 3
 484AL Strut Aft Fairing Doors - System 4

 C.
Procedure

 S 012-040
 (1)  Open the fairing doors on the trailing edge of the applicable strut (AMM 54-62-00/201).
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MAINTENANCE MANUAL

 S 862-041
 WARNING: MAKE SURE YOU RELEASE THE PNEUMATIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. THE PNEUMATIC SYSTEM PRESSURIZES THE HYDRAULIC RESERVOIR. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
 (2) Release the pressure in the pneumatic system (AMM 36-00-00/201).
 S 862-042
 WARNING: MAKE SURE YOU RELEASE THE HYDRAULIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
 (3)
Release the pressure in the hydraulic system (AMM 29-11-00/201).

 S 022-043

 (4)
Use a wrench to remove the check valve (10) from the module.

 (a)  
Remove the packings (12 and 14) and the backup rings (11 and 13). 1) Discard the packings and the backup rings.

 TASK 29-11-18-402-044
 7. Case Drain Module Check Valve Installation (Fig. 201)
__________________________________________
 A. Consumable Materials
 (1)  
D00567 Skydrol Assembly Lube MCS 352

 B.
Parts

 ~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 10 | Check Valve | 29-11-18 | 01 | 90 | | | 11 | Backup Ring | | | 110 | | | 12 | Packing | | | 105 | | | 13 | Backup Ring | | | 100 | | | 14 | Packing | | | 95 | 2......…........…...................................…..........….....….........1
　
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