27-61-01
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747-400 MAINTENANCE MANUAL
 INBOARD FLIGHT SPOILERS - INSPECTION/CHECK
__________________________________________
 1.  General_______
 A.  There is one task in this procedure; an inspection of the inboard flight spoilers. To do the inspection, you measure the inner and outer diameters of the parts which are in the spoiler hinges and the control package connection. The parts include bushings, bearings, liners and bolts.
 B.  To do the check, you must remove the spoiler from the airplane and disassemble the hinges and the control package connection. You usually do this procedure before you install an inboard flight spoiler.
 TASK 27-61-01-206-001
 2.  Inboard Flight Spoiler Inspection_________________________________
 A.  Standard Tools and Equipment
 (1)  
Micrometer - 0 to 1 inch(0 to 25.4mm)

 (2)  
Micrometer - 1 to 2 inch(25.4 to 50.8mm)

 (3)  
Vernier caliper

 B.  
References

 (1)  
27-61-01/401, Inboard Flight Spoilers

 C.  
Access

 (1)  
Location Zone
 575 Spoiler No. 5
 675 Spoiler No. 8

 D.  
Procedure

 S 026-002
 (1)  
Do this task: "Inboard Flight Spoiler Removal" (Ref 27-61-01/401).

 S 226-003

 (2)  
Examine the parts for worn areas:

 (a)  
Remove the parts.

 (b)  
Use a micrometer or a vernier caliper to measure the parts.

 (c)  
Compare the dimensions you measured to the permitted dimensions shown in Fig. 601.

 (d)  
Repair or replace the parts that are not in the tolerance.

 (e)  
Install the parts.

 S 426-004
 (3)  Do this task: Inboard Flight Spoiler Installation"
 (Ref 27-61-01/401).

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 27-61-01
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747-400
MAINTENANCE MANUAL

SEE A
HINGE NO. 1 HINGE NO. 2 BSEE CSEE  EXAMPLE OF NO. 5 AND 8 SPOILERS INBOARD 
WING REAR SPAR  HINGE NO. 2 DSEE 
HINGE NO. 1 BSEE 
FWD  INBD  ATTACHMENT PACKAGE CONTROL SPOILER ESEE 
A 
Figure 601 (Sheet 1) Inboard Flight Spoilers Wear Limits 

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 27-61-01
 ALL  ú ú 01 Page 602 ú Feb 10/91
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747-400 MAINTENANCE MANUAL
INBOARD FLIGHT SPOILER

Inboard Flight Spoilers Wear Limits
Figure 601 (Sheet 2)

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 27-61-01
 ALL  ú ú 01 Page 603 ú Dec 10/88
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747-400
MAINTENANCE MANUAL

NO. INDEX 1  PART NAME DIM. BOLT BEARING ID OD  0.49950.4990 0.50000.4993 DIAMETER DESIGN LIMITS INCHES MAXIMUMMINIMUM INCHES (mm)(mm) (12.674) (12.687) (12.7)(12.682)  0.4950 0.5045 WEAR LIMITS WEAR INCHES DIMENSION PERMITTED (mm) (12.573) (12.814)  INCHES CLEARANCE DIAMETER MAXIMUM (mm) (0.127) 0.005  REPLACE WORN PART 1  REPAIR WORN PART X  INSTR REPAIR 2 
2  BOLT BUSHING ID OD  0.5000 0.49950.4990 0.5010 (12.687)(12.674) (12.725)(12.7)  0.4950 0.5045 (12.573) (12.814)  (0.127) 0.005  X X  2 2 
3  BUSHING FLANGED BOLT ID OD  0.49950.4990 0.50150.5000 (12.687)(12.674) (12.738)(12.7)  0.4950 0.5045 (12.573) (12.814)  (0.127) 0.005  3  X  2 
　
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