S 412-098-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (21)
 Close the thrust reversers (AMM 78-31-00/201).

 S 412-118-N00

 (22)
 Close the core cowl panels (AMM 71-11-06/201).

 S 412-099-N00

 (23)
 Close the fan cowl panels (AMM 71-11-04/201).

 S 442-100-N00

 (24)
 Do the activation procedure for the thrust reversers (AMM 78-31-00/201).

 S 212-116-N00

 (25)
 Do the Spare Engine Inspection.

 (a)  
Supply electrical power (AMM 24-22-00/201).

 (b)  
Do a cycle of these circuit breakers to the open position and then the closed position. 1) P7 Overhead Circuit Breaker Panel

 a) 7C1 FMCS FMC L
 b) 7C23 FMCS FMC R

 (c)  
Show the PERF INIT page on the CDU.
 1) Push the INIT/REF key.

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 71-00-30
 ALL  ú ú N01 Page 225 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
2) Push the line select key (LSK) adjacent to the <INDEX prompt to show the INIT/REF INDEX page. 3) Push the LSK adjacent to the <PERF prompt to show the PERF INIT page.
 (d)  Make sure ACTIVE shows in the space directly below SPARE ENG on the PERF INIT page.
 S 572-071-N00
 (26) If the engine is to be put in storage, do the drying procedure for the bearing compartment (AMM 71-00-03/201) (optional).
 NOTE: Water can condense in the engine bearing compartments both
____ during and after the flight where the engine is ferried. This occurs because of temperature and pressure changes and can cause corrosion on parts of the bearings. If the engine turns freely, the engine will be lubricated sufficiently to decrease the possible damage. You must do the drying procedure for the bearing compartment in areas of high humidity.
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 71-00-30
 ALL  ú ú N01 Page 226 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ENGINE COWLING - DESCRIPTION AND OPERATION
__________________________________________
 1.  General
_______
 A.  The engine cowling is an aerodynamically smooth surface for protection on the outer side of the engine, engine-mounted components, and accessories. The engine cowling controls airflow around and through the engine, and gives access to different areas of the engine and fan case. The description of the engine cowling is given in this section. The exhaust system components are shown for reference only. For more data on the exhaust system components, see Turbine Exhaust System - Description and Operation (Ref 78-11-00/001) and Thrust Reverser System - Description and Operation (Ref 78-31-00/001).
 B.  The cowling for each engine includes the inlet cowl, fan cowl panels and core cowl panels (Fig. 1).
 2.  Inlet Cowl (Fig. 2)
__________
 A.  The inlet cowl is installed on the forward flange of the engine fan case and is used to permit airflow to the engine with minimum drag.
 B.  The inlet cowl is an aluminum structure with a honeycomb core acoustical lining, and kevlar-graphite/nomex honeycomb external panels. The approximate dimensions and weight of the inlet cowl are: 114 inches (290 cm) in diameter, 56 inches (142 cm) in length and a weight of 665 pounds (302 kgs).
FAN COWL 
PANELS 
INLET COWL  EXHAUST 
NOZZLE 
1 
CORE COWL 
PANELS 

THRUST REVERSER 1
FWD INBD
1 EXHAUST SYSTEM COMPONENTS SHOWN FOR REFERENCE ONLY
Engine CowlingFigure 1
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