(1)
Location Zone

 412 Engine 1 - Main Gearbox Aft Face 6 o'clock Main Gearbox Fwd Face 6 o'clock Bottom of Oil Tank
 422 Engine 2 - Main Gearbox Aft Face 6 o'clock Main Gearbox Fwd Face 6 o'clock Bottom of Oil Tank
 432 Engine 3 - Main Gearbox Aft Face 6 o'clock Main Gearbox Fwd Face 6 o'clock Bottom of Oil Tank
 442  Engine 4 - Main Gearbox Aft Face 6 o'clock Main Gearbox Fwd Face 6 o'clock Bottom of Oil Tank
 (2)  Access Panel
 415 Left Thrust Reverser Half - Engine 1
 416 Right Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 426 Right Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 436 Right Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4
 446 Right Thrust Reverser Half - Engine 4

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 79-21-10
 ALL  ú ú N02 Page 410 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
F.  Procedure
 S 644-031-N00
 (1)  Lubricate the new packing (2, 10, or 18) with engine oil.
 S 434-015-N00
 CAUTION:_______MAKE SURE YOU INSTALL THE MCD HOUSING WITH A PACKING ON IT. IF THE MCD HOUSING DOES NOT HAVE A PACKING, AN OIL LEAKAGE CAN OCCUR AND CAUSE DAMAGE TO THE ENGINE.
 (2)  
Install the new packing (2, 10, or 18) to the MCD housing
 (1, 9, or 17).

 S 434-046-N00

 (3)
Install the MCD housing (1, 9, or 17) with the steps that follow:

 (a)  
Remove protective cap from the port.

 (b)  
Lubricate the new packing (2, 10, or 18) with engine oil.

 (c)  
Lubricate the threads of the MCD housing (1, 9, or 17) with engine oil.

 (d)  
Tighten the MCD housing (1) on the lubrication and scavenge oil pump to 90-100 pound-inches (10.2-11.3 newton-meters). 1) Install the lockwire or safety cable and safety cable

 ferrule to the MCD housing (1).

 (e)  
Tighten the MCD housing (9) on the drain port of the main gearbox to 200-225 pound-inches (22.6-25.4 newton-meters).

 NOTE: When you install the MCD housing into the main gearbox,
____ hold the bushing with a wrench. If this is not done, the bushing will become to tight.
 1)  Install the lockwire or safety cable and safety cable ferrule to the MCD housing (9).
 (f)  Tighten the master MCD housing (17) on the drain port of the oil tank to 200-225 pound-inches (22.6-25.4 newton-meters). 1) Install the lockwire or safety cable and safety cable
 ferrule to the master MCD housing (17).
 S 434-017-N00
 (4)  Install the MCD probe.
 S 414-040-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (5)  Close the thrust reverser (AMM 78-31-00/201).
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 79-21-10
 ALL  ú ú N02 Page 411 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 414-032-N00
 (6)  
Close the core cowl panel (AMM 71-11-06/201).

 S 414-033-N00

 (7)  
Close the fan cowl panel (AMM 71-11-04/201).

 S 444-034-N00

 (8)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).

 S 614-019-N00

 (9)  
Do the oil servicing procedure (AMM 12-13-03/301).

 S 794-047-N00

 (10)
 Do the test of the Magnetic Chip Detector that is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).

 TASK 79-21-10-404-020-N00
 5. Install the Magnetic Chip Detector Probe (Fig. 401)
________________________________________
 A. Consumable Materials
 (1)  
D00390 Oil - Engine