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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
SPL-1675 Assembly - Lock, Flight Controls
(Part #: F80049-18, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
-900ER, -BBJ)
(Opt Part #: F80049-12, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
-900ER, -BBJ)
C. Location Zones
Zone Area
133 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Left
134 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Right
211 Flight Compartment - Left
212 Flight Compartment - Right
D. Remove Pressure from the Aileron Hydraulic Systems A and B
WARNING: YOU MUST REMOVE PRESSURE FROM THE AILERON HYDRAULIC SYSTEMS A AND
B BEFORE YOU DO MAINTENANCE ON THE AILERON CONTROL SYSTEM. THIS IS TO
PREVENT INJURY TO PERSONS, AND DAMAGE TO THE EQUIPMENT BECAUSE OF
ACCIDENTAL OPERATION OF THE AILERONS.
SUBTASK 27-11-00-860-001
(1) Remove pressure from the aileron hydraulic systems A and B:
(a) Set the FLT CONTROL A and B switches on the forward overhead panel, P5, to the OFF
position.
(b) Open these circuit breakers and install safety tags:
F/O Electrical System Panel, P6-2
Row Col Number Name
B 13 C00363 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
737-600/700/800/900
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Row Col Number Name
C 13 C01074 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
(c) Set the ELEC 2, HYD PUMPS A or ELEC 1, HYD PUMPS B switches on the forward
overhead panel, P5, to the OFF position.
(d) Operate the rudder pedals to decrease the remaining hydraulic system pressure.
SUBTASK 27-11-00-480-001
(2) Install the lock, SPL-1675 on the flight controls shutoff valves for systems A and B:
(a) Disconnect the electrical connectors from the shutoff valves.
NOTE: The flight controls shutoff valve is part of the flight controls hydraulic module. The
hydraulic module for hydraulic system A is found in the left main wheel well. The
hydraulic module for hydraulic system B is found in the right main wheel well.
(b) Make sure the manual override levers on the shutoff valves moved to position 2.
(c) Install the lock, SPL-1675 on each shutoff valve.
1) Make sure to install the lockpins.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Flight Controls Hydraulic Module Lock Installation
Figure 201 (Sheet 1 of 3)/27-11-00-990-801
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Flight Controls Hydraulic Module Lock Installation
Figure 201 (Sheet 2 of 3)/27-11-00-990-801
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Flight Controls Hydraulic Module Lock Installation
Figure 201 (Sheet 3 of 3)/27-11-00-990-801
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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TASK 27-11-00-860-802
3. Put the Aileron Hydraulic Systems A and B Back to the Condition Before Pressure Removal
(Figure 201)
A. References
Reference Title
12-12-00-610-801 Hydraulic Reservoir Servicing (P/B 301)
SWPM 20-60-03 Standard Wiring Practices Manual
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
SPL-1675 Assembly - Lock, Flight Controls
(Part #: F80049-18, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
　
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