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SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO
PERSONS AND DAMAGE TO EQUIPMENT.
(1) Use a hydraulic service cart to supply system B hydraulic power, do this task: Hydraulic System
A or B Pressurization, TASK 29-11-00-860-801.
NOTE: It will be necessary to control the pressure output of the hydraulic service cart.
E. Flap Priority Valve Test
SUBTASK 27-51-00-860-043
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
FLAPS AND FLAP DRIVE MECHANISMS. THE FLAPS CAN CAUSE INJURIES TO
PERSONS AND DAMAGE TO EQUIPMENT.
(1) Move the flap control lever to the 10-unit position to extend the flaps.
NOTE: Wait for the flaps to get to the 10-unit position.
SUBTASK 27-51-00-730-005
(2) Reduce the pressure output from the hydraulic service cart to 2400 psi (16550 kPa).
SUBTASK 27-51-00-720-007
(3) Do a check of the time necessary to retract the flaps to the 5-unit position:
NOTE: The flaps will retract slowly with the hydraulic pressure reduced.
(4) Do a check of the time necessary to retract the flaps:
(a) Move the flap control lever to the 5-unit position.
NOTE: The flaps can make noise while they retract slowly.
(b) Make sure the time necessary to retract the flaps is a minimum of 59 seconds.
NOTE: It is not necessary to wait more than 1 minute for the flaps to retract.
(c) Increase the pressure output from the hydraulic service cart to 3000 psi (20685 kPa).
NOTE: If the flaps are not in the 5-unit position, they will retract much faster.
SUBTASK 27-51-00-720-008
(5) Do a check of the time necessary to retract the flaps to the UP position:
(a) Move the flap control lever to the UP position.
(b) Make sure the time necessary to retract the flaps is 17 to 22 seconds.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Page 551
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F. Put the Airplane Back to Its Usual Condition
SUBTASK 27-51-00-860-044
(1) Remove system B hydraulic power, do this task: Hydraulic System A or B Power Removal,
TASK 29-11-00-860-805.
------------------------- END OF TASK ---------------------------
TASK 27-51-00-720-802
10. Flap Control Lever Force Test
(Figure 501)
A. General
(1) This test does a check of the force necessary to move the flap control lever.
B. References
Reference Title
24-22-00-860-811 Supply Electrical Power (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)
C. 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-1557 Gauge - Force
(Part #: DG-200, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: DPP-500G, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: DPPH-150, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: DPPH-50, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: FDIX 100, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
(Part #: FDIX 50, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
(Part #: FDV 50, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
(Opt Part #: FDI 100, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
D. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
E. Prepare for the Test
SUBTASK 27-51-00-860-045
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-51-00-860-046
WARNING: KEEP PERSONS AND EQUIPMENT 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 INJURIES TO
PERSONS AND DAMAGE TO EQUIPMENT.
(2) Supply system B hydraulic power, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-51-00
Page 552
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
F. Flap Control Lever Force Test
SUBTASK 27-51-00-860-047
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
FLAPS AND FLAP DRIVE MECHANISMS. THE FLAPS CAN CAUSE INJURIES TO
PERSONS AND DAMAGE TO EQUIPMENT.
(1) Move the flap control lever to the UP position to retract the flaps.
SUBTASK 27-51-00-720-009
　
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