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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FAN COWL PANEL LATCH - ADJUSTMENT/TEST
______________________________________
 1.  General
_______
 A.  The task in this procedure gives the instructions to adjust the latches for the fan cowl panel.
 B.  You must adjust the latches to get the correct aerodynamic tolerances and latch tension.
 C.  You must adjust the latches and shims when an engine, fan cowl panel, fan cowl latch or thrust reverser is replaced.
 D.  You must install and adjust the thrust reverser before you adjust the latches.
 TASK 71-11-05-825-018-N00
 2.  Adjust the Fan Cowl Panel Latch (Fig. 501)
_______________________________
 A.  Standard Tools and Equipment
 (1)  
Hex Wrench - 3 millimeters or 7/64 inch
 standard long series

 (2)
Scale - Push-Pull, 60-pound (267-N) capacity

 B.  
Consumable Materials

 (1)
G02020 Clay, Modeling

 (2)
G00009 Compound, Corrosion Inhibiting - BMS 3-23 Type II

 (3)
C00259 Primer - BMS 10-11 Type I

 C.  
References

 (1)
AMM 71-11-04/201, Fan Cowl Panel

 (2)
AMM 71-11-05/401, Fan Cowl Panel Latch

 (3)
AMM 78-31-00/201, Thrust Reverser System

 (4)
IPC 71-11-05-01

 D.  
Access

 (1)  
Location Zone
 413 and 414 Fan Cowl Panel - Engine 1
 423 and 424 Fan Cowl Panel - Engine 2
 433 and 434 Fan Cowl Panel - Engine 3
 443 and 444 Fan Cowl Panel - Engine 4

 E.  
Adjust the Latches and Shims for the Fan Cowl Panel

 (1)
Open the fan cowl panels (AMM 71-11-04/201).

 S 015-002-N00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
C 
HEX WRENCH 
SEE A  A  A  B  B  IN THE 15` OPEN LATCH HANDLE (FREE-TRAVEL) POSITION C 
FWD 
A LATCHES AT THE 15` (FREE-TRAVEL) POSITION THE TWO COWL PANELS ARE CLOSED, 
SHIMS (3 LOCATIONS) KEEPER  SHIMS INDEX PIN 
FAN COWL PANEL WITH THE KEEPERS AND SHIMS A-A (4 LOCATIONS) BOLT  FWD 
LATCH HOOK SHIM  KEEPER

0.125 INCH COWL SKIN (3.2 mm) (REF)
CLEARANCE LOCATION B-B
Fan Cowl Panel Latch Adjustment Figure 501 (Sheet 1)
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 71-11-05
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FOR THE KEEPER ASSEMBLY

LATCH HANDLE IS 40-60 POUNDS
KEEPER ASSEMBLY
(178-267 N) APPLIED AS SHOWN.
(3 LOCATIONS)
2
|0.03 INCH

B
(|0.76 mm)
Fan Cowl Panel Latch Adjustment Figure 501 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(2)  S 215-003-N00Make sure the keeper eyebolts do not turn and that the retention pins are not broken off.
 (3)  S 425-004-N00If the keeper eyebolts turn, immediately replace the broken or damaged keepers and latches (AMM 71-11-05/401).
 (4)  S 415-005-N00Close and latch the thrust reverser (AMM 78-31-00/201).
 (5)  S 415-017-N00Close and latch the fan cowl panels (AMM 71-11-04/201).
 S 825-019-N00

 CAUTION: MAKE SURE YOU CORRECTLY ADJUST THE LATCHES ON THE FAN COWL
_______ PANELS. IF THE LATCHES ARE NOT ADJUSTED, THE LATCHES WHEN CAN RELEASE WHEN THE AIRPLANE IS IN THE AIR. IF THE LATCHES RELEASE, DAMAGE CAN OCCUR TO THE FAN COWL OR THE ENGINE.
　
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