C.  
Prepare To Do a Check of the Latch Band (Fig. 601)

 S 016-001-N00
 (1)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 216-002-N00

 (2)  
Examine the latch ring for wear or damage.

 (a)  
Examine the latch for cracks. 1) Cracks in the latch ring are not permitted.

 (b)  
Examine the flange for cracks.

 1)  If the wear or damage is more than the limits, repair the flange (SRM 54-30-90).

 (c)
Look for cracks or damage around the bolt holes.

 1)  If the crack or damage is more than the limits, repair the hole (SRM 54-30-90).

 (d)  
Look for scratches, dents or other damage on the lower latch handles. 1) If the damage is more than the limits, repair the latch

 handles (SRM 54-30-90).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
LATCH BAND 
LATCH BAND 
INSTALLATION 
SEE  A
BAND 
LOWER THRUST  RETAINER 
REVERSER  (REF) 
TORQUE BOX 
SEE  B 
LATCH BAND 
A 
T-BOLT LATCH 
(SHOWN LOCKED)  LEFT LOWER 
LATCH BAND  SYNC LOCK  NON-LOCKING 
(REF)  HYDRAULIC 
ACTUATOR (REF) 
SLEEVE 
DEACTIVATION 
PIN FOR FLIGHT 
DISPATCH (REF) 
SLEEVE 
TENSION  DEACTIVATION 
LATCH LOCK  PIN FOR FLIGHT 
(REF)  DISPATCH (REF) 
FORWARD 
TENSION 
LATCH 
LOWER THRUST REVERSER TORQUE BOX 
B 
Latch Band - Inspection 
Figure 601 

F59363
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S 216-003-N00
 (3) Examine the forward latch ring.
 NOTE: The thrust reverser must be fully closed and latched.
____
 (a) The top latch must open and clear the U-bolt on the fan case.
 1)  Adjust the latch ring if it is necessary (AMM 78-31-02/501).
 S 416-004-N00
 (4) Close the fan cowl panels (AMM 71-11-04/201).
 TASK 78-31-02-206-005-N00
 3.  Torque Box Inspection
_____________________
 A.  References
 (1)
AMM 71-11-04/201, Fan Cowl Panels

 (2)
SRM 54-30-02, Fan Duct Cowl Allowable Damage

 B.  
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

 (2)  
Access Panels
 413 and 414 Fan Cowl Panels - Engine 1
 423 and 424 Fan Cowl Panels - Engine 2
 433 and 434 Fan Cowl Panels - Engine 3
 443 and 444 Fan Cowl Panels - Engine 4

 C.
Prepare To Do a Check of the Thrust Reverser Torque Box (Fig. 602)

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

 S 016-006-N00
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEEA
THRUST REVERSER UPPER HYDRAULIC
TORQUE BOX ACTUATOR (REF)
　
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