S 416-012-N00

 (5)
Close the core cowl panels (AMM 71-11-06/201).

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 ALL  ú ú N02 Page 612 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
NO. 4 BEARING COMPARTMENT COVER - REMOVAL/INSTALLATION
______________________________________________________
 1.  General
_______
 A.  This procedure gives the steps for the removal and the installation of the No. 4 bearing compartment cover, which will be referred to as the No. 4 bearing cover.
 B.  The No. 4 bearing cover is installed on the rear inner flange of the turbine exhaust case.
 C.  You can remove the turbine exhaust sleeve and plug to get access to the No. 4 bearing cover.
 TASK 72-54-05-004-001-N00
 2.  Remove the No. 4 Bearing Compartment Cover (Fig. 401)
__________________________________________
 A.  Equipment
 (1)  
ENGINES PRE-PW-SB 72-385;

 PWA 85307 - Jackscrew Puller, Pratt & Whitney, Commercial Products Division, 400 Main Street, East Hartford, CT 06108

 (2)  
ENGINES POST-PW-SB 72-385;
 Jackscrews - 0.190-32 (eight are necessary)

 B.  
References

 (1)  
AMM 78-11-02/401, Turbine Exhaust Plug

 (2)  
AMM 78-31-00/201, Thrust Reverser System

 C.  
Access

 (1)  
Location Zone
 412 Engine 1 - Turbine Exhaust Case
 422 Engine 2 - Turbine Exhaust Case
 432 Engine 3 - Turbine Exhaust Case
 442 Engine 4 - Turbine Exhaust Case

 (2)  
Access Panel
 419 Turbine Exhaust Sleeve - Engine 1
 429 Turbine Exhaust Sleeve - Engine 2
 439 Turbine Exhaust Sleeve - Engine 3
 449 Turbine Exhaust Sleeve - Engine 4

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 ALL  ú ú N01 Page 401 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
TURBINE EXHAUST CASE
PACKING
NO. 4 BEARING COVER
A
BOLT (30 LOCATIONS)
A
NO. 4 BEARING
HEATSHIELD

NO. 4 BEARING SHIELD
NOTE: EXHAUST SLEEVE AND EXHAUST PLUG REMOVED.
A
PWA 85307NO. 4 BEARING JACKSCREW PULLERNO. 4 BEARINGCOVER COVER
PACKING
NO. 4 BEARING SHIELD
THREADED PIN (6 LOCATIONS)
TURBINE EXHAUST CASE
PWA 85307 JACKSCREW PULLER
(INSTALLED VIEW) A-A L-A4493
No. 4 Bearing Compartment Cover Installation
Figure 401 (Sheet 1)

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 ú ú N01 Page 402 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
LOCATION OF
NO. 4 BEARING
PRESSURE TUBE

No. 4 Bearing Compartment Cover Installation
Figure 401 (Sheet 2)

G34002
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 ALL  ú ú N01 Page 403 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
D. Procedure
 S 024-031-N00
 (1) Do the steps that follow to remove the shield and heat shield:
 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.
　
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