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(3) An adjustment of the leading edge slats
(4) An operational test of the leading edge flaps and slats in primary mode
(5) A timing test of the leading edge flaps and slats in primary mode
(6) An opertional test of the leading edge flaps and slats in standby mode
(7) A timing test of the leading edge flaps and slats in standby mode
(8) A test of the leading edge cruise depressurization system
(9) A test of the leading edge uncommanded motion protection system
(10) A test of the standby hydraulic system leading edge uncommanded motion
TASK 27-81-00-820-801
2. Leading Edge Flaps Adjustment
(Figure 501)
A. References
Reference Title
27-81-00-080-801 Leading Edge Flap and Slat Locks Removal (P/B 201)
27-81-00-480-801 Leading Edge Flap and Slat Locks Installation (P/B 201)
27-81-00-860-803 Leading Edge Flaps and Slats Extension (P/B 201)
27-81-00-860-804 Leading Edge Flaps and Slats Retraction (P/B 201)
29-11-00-860-801 Hydraulic System A or B Pressurization (P/B 201)
29-11-00-860-805 Hydraulic System A or B Power Removal (P/B 201)
B. Tools/Equipment
NOTE: When more than one tool part number is listed under the same "Reference" number, the
tools shown are alternates to each other within the same airplane series. Tool part numbers
that are replaced or non-procurable are preceded by "Opt:", which stands for Optional.
Reference Description
COM-1691 Protractor - Digital, Vertical or Horizontal
(Part #: KS5549, Supplier: 75245, A/P Effectivity: 737-ALL)
SPL-1734 Lockout Set - Leading Edge Slats and Krueger Flaps Actuators
(Part #: C27051-29, Supplier: 81205, A/P Effectivity: 737-600, -700,
-700C, -700ER, -700QC, -800, -900, -900ER, -BBJ)
(Opt Part #: C27051-1, Supplier: 81205, A/P Effectivity: 737-600, -700,
-700C, -700ER, -700QC, -800, -900, -BBJ)
C. Consumable Materials
Reference Description Specification
G01912 Lockwire - Monel (0.032 In. Dia.) NASM20995N~
C32
(QQ-N-281)
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
D. Location Zones
Zone Area
512 Left Wing - Krueger Flap No. 2
513 Left Wing - Krueger Flap No. 1
612 Right Wing - Krueger Flap No. 3
613 Right Wing - Krueger Flap No. 4
E. Prepare for the Adjustment
SUBTASK 27-81-00-860-016
WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE FLIGHT CONTROL
SURFACES, THE THRUST REVERSERS, AND THE LANDING GEAR. THESE
COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER.
THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) To pressurize hydraulic system B, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
SUBTASK 27-81-00-860-017
CAUTION: MAKE SURE THE INBOARD FAN DUCT COWL AND THE THRUST REVERSERS ARE
CLOSED OR REMOVED BEFORE YOU EXTEND THE LEADING EDGE FLAPS AND
SLATS. THERE IS NOT SUFFICIENT CLEARANCE FOR THE FLAPS AND SLATS TO
EXTEND IF THE INBOARD FAN DUCT COWL AND THE THRUST REVERSERS ARE IN
THE OPEN POSITION. THIS CAN CAUSE DAMAGE TO EQUIPMENT.
(2) Move the flap control lever to the 1-unit detent position to extend the leading edge flaps.
SUBTASK 27-81-00-860-018
(3) To remove power from hydraulic system B, do this task: Hydraulic System A or B Power
Removal, TASK 29-11-00-860-805.
SUBTASK 27-81-00-480-004
WARNING: CAREFULLY INSTALL THE LEADING EDGE FLAP ACTUATOR LOCK TO PREVENT
ACCIDENTAL OPERATION OF THE LEADINGE EDGE FLAPS. THE LEADING EDGE
FLAPS CAN MOVE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE
TO EQUIPMENT.
(4) Install the lockout set, SPL-1734 on all the adjacent flaps that you will not adjust. To install the
lockout set, do this task: Leading Edge Flap and Slat Locks Installation,
TASK 27-81-00-480-801.
F. Leading Edge Flaps Adjustment
SUBTASK 27-81-00-860-019
(1) To pressurize hydraulic system B, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
SUBTASK 27-81-00-860-020
WARNING: MAKE SURE PERSONS AND EQUIPMENT ARE CLEAR OF THE LEADING EDGE FLAPS
AND SLATS AND THE TRAILING EDGE FLAPS. THE LEADING EDGE FLAPS AND
SLATS AND THE TRAILING EDGE FLAPS CAN MOVE QUICKLY. THIS CAN CAUSE
INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) Move the flap control lever to the UP detent to retract the leading edge flaps.
SUBTASK 27-81-00-220-001
(3) Do a check of the full extend angle of the leading edge flap [1] or [2].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
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