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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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