S 024-019-N00
 CAUTION: DO NOT REMOVE THE POWER UNIT WITH THE THRUST REVERSER IN THE
_______ OPEN POSITION. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  Disconnect the electrical connectors from the power unit.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. THRUST REVERSERS WITH COWL OPENING POWER ú

 78-31-05
 UNITS  ú
 ú N01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 402Oct 10/95 

SEE A
VENT PLUG
FILLER PLUGMANUAL OVERRIDE KNOBS OIL LEVEL
DRIP TRAY
ELECTRICAL CONNECTORS BOLT WASHER (4 LOCATIONS)HYDRAULIC PORTS
A
Thrust Reverser Cowl Opening Power Unit Installation
Figure 401

 E46397
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. THRUST REVERSERS WITH COWL OPENING POWER ú

 78-31-05
 UNITS  ú
 ú N01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 403Oct 10/94 

////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 034-005-N00
 CAUTION:_______MAKE SURE TO QUICKLY CLEAN THE HYDRAULIC FLUID WHICH FALLS. IF YOU DO NOT CLEAN THE HYDRAULIC FLUID, IT CAN CAUSE DAMAGE TO THE ENGINE.
 (2)  Disconnect the hydraulic lines from the RH and LH ports on the power unit.
 (a)  Install the protection caps on the ports and the hydraulic lines.
 NOTE: This will prevent hydraulic fluid leaks during the power
____
 unit removal.

 S 034-006-N00
 (3)  
Turn the vent plug clockwise to seal the vent.

 S 034-007-N00

 (4)  
Remove the mounting bolts and washers which attach the unit to the strut.

 (a)  Make a record of the bolt location.
 S 024-018-N00
 (5)  Remove the power unit from the strut.
 TASK 78-31-05-404-008-N00
 3. Install the Power Unit
______________________
 A. Consumable Materials
 (1)  
D00148 Fluid, Hydraulic - BMS 3-11, Type IV,
 Class 1 Fire Resistant

 B.
References

 (1)  
AMM 12-12-04/301, Thrust Reverser Cowl Opening Power Unit

 (2)  
AMM 24-22-00/201, Electrical Power - Control

 (3)  
AMM 27-62-00/201, Speed Brake Control System

 (4)  
AMM 54-62-04/401, Nacelle Strut Access Panels

 (5)  
AMM 71-11-04/201, Fan Cowl Panels

 (6)  
AMM 71-11-06/201, Core Cowl Panels

 (7)  
AMM 78-31-00/201, Thrust Reverser System

 (8)  
AMM 78-31-08/401, Thrust Reverser Opening Flex Hoses

 (9)  
IPC 78-31-06, Fig. 5

 C.
Access

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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. THRUST REVERSERS WITH COWL OPENING POWER ú

 78-31-05
 UNITS  ú
 ú N01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 404Oct 10/95 

(2)  
Access Panels
 413 and 414 Fan Cowl Panels - Engine 1
 417 and 418 Core Cowl Panels - Engine 1
 423 and 424 Fan Cowl Panels - Engine 2
 427 and 428 Core Cowl Panels - Engine 2
 433 and 434 Fan Cowl Panels - Engine 3
 437 and 438 Core Cowl Panels - Engine 3
 443 and 444 Fan Cowl Panels - Engine 4
 447 and 448 Core Cowl Panels - Engine 4
 451A No. 2 Forward Fairing - Engine 1
 461A No. 2 Forward Fairing - Engine 2
 471A No. 2 Forward Fairing - Engine 3
 481A No. 2 Forward Fairing - Engine 4
　
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