C.  
Access

 (1)  
Location Zone
 412 Engine 1 - Intermediate Case 6 o'clock
 422 Engine 2 - Intermediate Case 6 o'clock
 432 Engine 3 - Intermediate Case 6 o'clock
 442 Engine 4 - Intermediate Case 6 o'clock

 (2)  
Access Panel 415 and 416 Thrust Reverser Halves - Engine 1 425 and 426 Thrust Reverser Halves - Engine 2 435 and 436 Thrust Reverser Halves - Engine 3 445 and 446 Thrust Reverser Halves - Engine 4

 D.  
Prepare for the removal of the angle gearbox.

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 044-065-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Do this task: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 S 014-067-N00

 (2)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 014-068-N00

 (3)  
Open the core cowl panels (AMM 71-11-06/201).

 S 014-066-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (4)  
Open the thrust reversers (AMM 78-31-00/201).

 S 494-004-N00

 (5)  
Put the container under the angle gearbox (11) and the drive shaft housing (5) to collect the oil (Fig. 401).

 E.
Remove the angle gearbox.

 S 014-098-N00
 (1)  
Remove the tubes, wire bundles and fire detecters as follows (Fig. 401):

 (a)  
Remove screw (3) and washer (2) which attaches the clamp for the actuator drain tube of the 2.5 bleed valve to the bracket (7).

 NOTE: This bracket (7) is on the angle gearbox (11) at the
____ 8:00 o'clock position.
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SEE  A 
BEARINGS AND 2 NO. 1, 1.5, TUBE FOR THE OIL SCAVENGE  SEE  G  SEE  G 
2 
SEE  H  1  SEE  F 
SEE  B 
A  A 
SEE  C 
SEE  E 
HYDRAULIC MANIFOLD BOTTOM 
COOLER INLET OF THE OIL RETURN MANIFOLD 
1 2 3 4 5  ENGINES POST-PW-SB 72-709 ENGINES PRE-PW-SB 72-709 ENGINES POST-PW-SB 75-45 ENGINES POST-PW-SB 79-54 ENGINES PRE-PW-SB 79-54  A FWD BOTTOM VIEW  L-A1851 (0891) 

Angle Gearbox Installation
Figure 401 (Sheet 1)

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D21465
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
INTERMEDIATE CASE 
29. TOWER SHAFT 
11. GEARBOX ANGLE  26. PACKING 5. HOUSING DRIVE SHAFT  20. SHAFT DRIVE MAIN GEARBOX  SPUR GEAR SHAFT 
18. PACKING 
BEVEL GEAR 33. SNAP RING  31. PLUG  FAN EXIT CASE FLANGE 21. SNAP RING A-A  23. PACKING  DRIVE SHAFT HOUSING REAR 
L-A0532 

Angle Gearbox Installation
Figure 401 (Sheet 2)

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