S 416-012-N00
(5)
Close the core cowl panels (AMM 71-11-06/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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////////////////////////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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