(h)  
Install the lockwire.

 S 865-008
 (8)  Retract the inboard flaps.
 H. Put the Airplane Back to its Usual Condition
 S 845-033
 (1)  
Pressurize hydraulic system No. 4 (AMM 29-11-00/201).

 S 845-034

 (2)  
Remove the spoiler actuator locking tools or open the flight control shutoff valves for hydraulic system No. 4.

 S 845-035

 (3)  
Put the speed brake lever in the DOWN detent to lower spoilers No. 5 through 8 above the inboard flaps.

 (4)
Release the pressure from the hydraulic system (AMM 29-11-00/201).

 S 845-037

 (5)  
Close the 7G6 SPEED BRAKE AUTO CONT circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 845-036
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 57-22-01
 ALL  ú ú 01 Page 511 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 FIXED TRAILING EDGE RIB BUSHING - INSPECTION/CHECK
__________________________________________________
 1.  General
_______
 A.  This procedure contains one task. The task is the inspection of the rib bushing for the fixed trailing edge.
 B.  To do the inspection, you must measure the inner and/or the outer diameters of the bushings and the pins. These components are used in the connections of the rods and the panel and the landing gear beam.
 C.  You must remove the rib's rods from the airplane. You must not fully disassemble the rib rods after the removal.
 TASK 57-22-02-206-001
 2.  Rib Bushings Inspection (Fig. 601)
_______________________
 A.  Standard Tools and Equipment
 (1)  
Micrometer - 0 to 1 inch

 (2)  
Vernier caliper

 B.  References
 (1)  
IPC 57-22-30, Fig. 1 (Rib No. 3)

 (2)  
IPC 57-22-34, Fig. 2 (Rib No. 1 and 2)

 C.  Access
 (1)  Location Zones 572 Landing gear support beam and rear spar to trailing edge, Left
 672  Landing gear support beam and rear spar to trailing edge, Right
 D.  Procedure
 S 036-002
 (1)  
Remove the tie rods.

 S 226-003

 (2)  
Examine the rib bushings of the fixed trailing edge and the related parts for worn areas (Fig. 601, 602, 603).

 (a)  
Remove the parts that you must examine.

 (b)  
Measure the parts as it is necessary.

 NOTE: Use the micrometer or the vernier caliper to measure the
____
 dimensions.

 (c)  
Compare the dimensions that you measured to the permitted dimensions as shown.

 (d)  
If a part is not to the correct tolerance, repair it or replace it as it is necessary.

 (e)  
Install the parts that you removed.

 S 436-004
 (3)  Install the tie rods.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 57-22-02
 ALL  ú ú 01 Page 601 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
UPPER RIB

B-B
Fixed Trailing Edge Rib WBL 255.692 Bushing Wear Limits Figure 601 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 57-22-02
 ALL  ú ú 01 Page 602 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

INDEX NO.  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  REPLACE PART WORN  REPAIR WORN PART  REPAIR INSTR. 
DIAMETER  WEAR DIM. PER-MITTED  CLEAR-ANCE MAX DIA 
　
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