(5)  
AMM 52-34-00/001, Forward/Aft Cargo Doors

 C.
Access

 (1)  
Location Zone
 141 Aft Cargo Container Compartment, Left
 145 Bulk Cargo Compartment, Left

 (2)  
Access Panel
 822R Door - Aft Cargo Compartment

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747-400 MAINTENANCE MANUAL
 D. Install the Pneumatic Duct Insulation
 S 424-021
 (1)  Install the insulation blanket around the duct.
 NOTE: Make sure the insulation blanket makes an overlap of
____ approximately 2 inches along the length of the insulation blanket.
 S 434-008
 (2)  
Install the fiberglass tape around the insulation blanket in the applicable location.

 S 434-009

 (3)  
Tie the tape together with a square knot.

 S 434-010

 (4)  
Put the loose ends of the fiberglass tape under the insulation blanket overlap.

 E. Put the Airplane Back to Its Usual Condition
 S 414-011
 (1)  
Install the sidewall lining in the cargo compartment (AMM 25-52-01/401).

 S 414-012

 (2)  
Close the aft cargo door (AMM 52-34-00/001).

 (3)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 034-013
 TASK 36-11-18-404-014
 4. Precooler Inlet Duct Insulation Removal (Fig. 402)
_______________________________________
 A. References
 (1)  AMM 20-11-28/401, Standard Practices - Lockwire
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747-400
MAINTENANCE MANUAL

ENGINE BLEED AIR 
PRECOOLER (REF) 
PRECOOLER INLET 
DUCT INSULATION 
SEE  A 
ENGINE BLEED AIR 
SUPPORT  PRECOOLER 
PRECOOLER  ROD  BUTTONS  (REF) 
INLET DUCT  BRACKET 
INSULATION 

FWD
A
Precooler Inlet Duct Insulation Installation Figure 402
C18124
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747-400
MAINTENANCE MANUAL

 (2)
AMM 24-22-00/201, Manual Control

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

 (4)
AMM 71-11-04/201, Fan Cowl Panels

 (5)
AMM 71-11-06/201, Core Cowl Panels

 (6)
AMM 78-31-00/201, Thrust Reverser System

 B. Access
 (1)  
Location Zone 412 Engine 1 - High Pressure Compressor Case 10 o'clock 422 Engine 2 - High Pressure Compressor Case 10 o'clock 432 Engine 3 - High Pressure Compressor Case 10 o'clock 442 Engine 4 - High Pressure Compressor Case 10 o'clock

 (2)  
Access Panel
 415 Left Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4

 C. Prepare for the Removal
 S 864-013
 (1) Supply electrical power (AMM 24-22-00/201).
 S 864-014
 WARNING: YOU MUST RELEASE THE PRESSURE IN THE PNEUMATIC DUCT BEFORE YOU
_______ REMOVE A PNEUMATIC SYSTEM COMPONENT. IF YOU DO NOT RELEASE THE PRESSURE, HOT HIGH PRESSURE AIR CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2) Release the pressure in the pneumatic system (AMM 36-00-00/201).
 S 014-015
　
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