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INCH GAP WING FIXED0.040
SEAL LOWER LEADING
EXTEND STOPCHANNEL EDGE CHORD POINT
VARIABLE CAMBER FLAP LINKAGE
RIGGING BAR
A
PIVOT
DIMENSION Y
POINT G
B
DIMENSION X
A
B
FWD
A-A
PIVOT POINT G
BOLT  SEAL
FLAP LINKAGE
CHANNEL EDGE OF 0.188 INCH 90` DIA HOLE IN BOLT
DIMENSION Y OR DIMENSION X SQUARE 1A
DIMENSION Y
DIMENSION X 90`
WING FIXED LOWER LEADING EDGE CHORD LINE1A YOU CAN USE A SCALE WITH THE
B-B
SQUARE TO TAKE THE MEASUREMENT IF NECESSARY.
Variable Camber Flap Linkage Adjustment Figure 202
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A

747-400 MAINTENANCE MANUAL
DRIVE UNIT NO. 4  OFFSET GEARBOX
DRIVE SHAFT
A ROTARY KRUEGER ACTUATOR FLAP (2 LOCATIONS)
A  ACTUATOR LINKAGE
WING LEADING EDGE
CLEARANCE
STRUCTURE INDICATOR PIN
B
0.04-0.10
RETRACT
INCH STOP BOLT
RETRACT STOP
B
KRUEGER FLAP  WASHERS  STOP BOLT BRACKET ACTUATOR ARM ON ROTARY
SEE  A  B-B 

FLAP RETRACTED A-A
0.04 INCH KRUEGERAFT MAXIMUMFLAP
KRUEGER FLAP
0.05 INCH MAXIMUM
6-INCH 6-INCH
STRAIGHTEDGE STRAIGHTEDGE 1.25-1.75 1.25-1.75 INCHES INCHES
POSITIVE CONTOUR
NEGATIVE CONTOUR AT FLAP LINKAGES
AT FLAP LINKAGE
A
A
Krueger Flap Linkage Adjustment Figure 203
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747-400
MAINTENANCE MANUAL

MOUNTING MOUNTING LUG
BOLT (2 LOCATIONS) O-RING AND
SLEEVE ELECTRICAL CONNECTOR
PNEUMATIC DUCT
ELECTRICAL CONNECTOR
MOUNTING BOLT
DRIVE SHAFT
SEE A 1. COUPLING/SPLINE
DRIVE SHAFT
COUPLING SLEEVE
SCREW DRIVE (2 LOCATIONS) SHAFT
MOUNTING BOLT AND CLAMP-UP 2. COUPLING/OUTPUT DRIVEBUSHING SPLINE UNIT
A
DESIGN LIMITS  WEAR LIMITS 
NO. INDEX  PART NAME DIM.  DIAMETER MAXIMUMMINIMUM  WEAR DIMENSION PERMITTED  CLEARANCE DIAMETER MAXIMUM  REPLACE WORN PART  REPAIR WORN PART  INSTR REPAIR 
INCHES  INCHES  INCHES  INCHES 
(mm)  (mm)  (mm)  (mm) 

0.0982 0.0994 0.1082
X
COUPLING 1 0.0100(2.4942) (2.5247) (2.7482)
1
(0.254)
0.0970 0.0982 0.0882
X
SPLINE 2  3
(2.4638) (2.4942) (2.2402) 0.0982 0.0994 0.1082
X
COUPLING 1 0.0100
(2.4942) (2.5247) (2.7482)
(0.254)
2
OUTPUT 0.0970 0.0982 0.0882
X
2 3
SPLINE (2.4638) (2.4942) (2.2402)
1
CIRCULAR SPLINE SPACE WIDTH 2
CIRCULAR SPLINE TOOTH THICKNESS 3
SPLINE BACKLASH MEASURED ON PITCH DIAMETER
Power Drive Unit Wear Limits Figure 204
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747-400
MAINTENANCE MANUAL

 (2)  
D00068 Oil-Jet Engine Oil - MIL-PRF-23699 (AMM 20-30-04/201)

 (3)  
D00049 Silicone Fluid - Viscasil 10000

 C. Parts ~.............................................................................. | AMM | | AIPC | ................. ...........................| | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ...............................................................................| | 201 | 8 | Solenoid Valve (Alternate) | 27-81-03 | 01 | 395 | | | 9 | Screw | | | 315 | | | 9 | Screw (Holding Clamp) | | | 160 | | | 10 | Washer | | | 150 | | | 11 | Packing (O-ring) | | | 320 | | | 11 | Packing (O-ring) | | | 325 |
　
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