Leading Edge Flap Nose Linkage Adjustment 
Figure 503 (Sheet 1)
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A 
737-300/400/500MAINTENANCE MANUAL 
FLAP NOSE LINK 
FLAP ACTUATOR 
B 
FLAP NOSE LINK 
HINGE (5 LOCATIONS) 
FLAP  
PANEL  
FLAP  A  
NOSE ROD  
INBOARD FLAP NOSE  A  FUEL BOOST  
(OUTBOARD SECTION)  PUMP  
FLAP NOSE  FLAP  
HINGE  NOSE LINK 
B 
FLAP NOSE ROD 
OPERATING 
FWD INBD CRANK 
CRANK 
ADJUSTABLE LINK INBOARD FLAP NOSE
INBOARD FLAP (FLAP NO. 2 SHOWN) 
(INBOARD SECTION) 
B 
FUEL LEADING EDGE BOOST FLAP CAVITY PUMP 
FLAP NOSE UPSTOP 
LEADING EDGE FLAP 
1 
1 
FWD 
1 
1  0.06 |0.03 INCH MINIMUM CLEARANCE FLAP 
NOSE 
2  IF THE FLAP NOSE TOUCHES THE FLAP NOSE UPSTOP AND ALL OTHER DIMENSIONS ARE CORRECT, THE CLEARANCE 
A-A 
BETWEEN FLAP NOSE AND FUEL BOOST PUMP CAN BE MORE THAN 1 
Leading Edge Flap Linkage Adjustment Figure 503 (Sheet 2) 
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A 737-300/400/500MAINTENANCE MANUAL 
INITIAL LENGTH 
8.18 |0.01 INCHES 
(OUTBOARD FLAP)
8.30 |0.01 INCHES 
(INBOARD FLAP)
FLAP NOSE LINK (NON-ADJUSTABLE) 
FLAP PANEL  WING 
LEADING
EDGE 
NOSE 
LINK FLAP 
INITIAL LENGTH FLAP5.24 |0.04 
PANELINCHES 
CRANK  ADJUSTABLE LINK CRANK 
FLAP NOSE ROD 
FLAP PAD 
SEE C FLAP PAD 
SEE C 
INITIAL LENGTH 
2.73 |0.04 INCHES 
FLAP NOSE FLAP NOSE 
OUTBOARD FLAP AND OUTBOARD FLAP NOSE INBOARD FLAP NOSE SECTION 
SECTION LINKAGE OF INBOARD FLAP LINKAGE OF INBOARD FLAP 
B-B B-B
OUTBOARD FLAP THE FLAP NOSE MUST (NO. 1 OR 4) INBOARD FLAP 
(NO. 2 OR 3) 
3 TOUCH THE PADS
SEAL DOOR 
INBD 
FLAP NOSE 
FLAP NOSE 
C 
THE FLAP NOSE MUST TOUCH THE FLAP. 
A MAXIMUM CLEARANCE OF 0.02 INCH 
IS PERMITTED.
3 
Leading Edge Flap Linkage Adjustment 
Figure 503 (Sheet 3)
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A 
737-300/400/500MAINTENANCE MANUAL
 S 865-044
 WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL 
 SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER.  AILERONS, RUDDERS, 
 ELEVATORS, TRAILING EDGE FLAPS, LEADING EDGE FLAPS AND SLATS, 
 SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY 
 WHEN YOU SUPPLY HYDRAULIC POWER.  THIS CAN CAUSE INJURY TO 
 PERSONS AND DAMAGE TO EQUIPMENT.
 CAUTION: MAKE SURE THAT THE INBOARD AND OUTBOARD FAN DUCT COWLS AND THE
_______ THRUST REVERSERS ARE CLOSED OR REMOVED BEFORE YOU EXTEND THE LEADING EDGE FLAPS AND SLATS. THERE IS NOT SUFFICIENT CLEARANCE FOR THE LEADING EDGE FLAPS AN SLATS TO EXTEND IF THE INBOARD AND OUTBOARD FAN DUCT COWLS AND THE THRUST REVERSERS ARE IN THE OPEN (MAINTENANCE) POSITION. THIS CAN CAUSE DAMAGE TO EQUIPMENT.
 (2)  Pressurize the hydraulic system B (Ref 27-81-00/201).
 S 865-006
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LEADING
_______ EDGE FLAPS AND SLATS. THE FLAPS WILL AUTOMATICALLY EXTEND AT ALL EXTEND POSITIONS OF THE TRAILING EDGE FLAPS. THE SLATS WILL AUTOMATICALLY EXTEND WHEN THE TRAILING EDGE FLAPS EXTEND TO THE 1, 2 OR 5-UNIT POSITIONS. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 
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