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INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) If the downlock pins are not installed in the nose and main landing gear, do this task: Landing
Gear Downlock Pins Installation, TASK 32-00-01-480-801.
SUBTASK 27-51-00-010-011
(2) Remove the aft fairings for the inboard and outboard flaps:
(a) Do this task: Inboard Flap Support Aft Fairing Removal, TASK 27-51-18-000-802.
(b) Do this task: Outboard Flap Inboard Support Aft Fairing Removal,
TASK 27-51-28-000-804.
(c) Do this task: Outboard Flap Outboard Support Aft Fairing Removal,
TASK 27-51-28-000-802.
SUBTASK 27-51-00-860-072
(3) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-51-00-860-073
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.
(4) Supply system B hydraulic power, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
F. Operational Test of the Transmission No-Back Brake
NOTE: This test is applicable to all of the transmissions for the trailing edge flaps.
SUBTASK 27-51-00-860-074
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) Retract the flaps to the UP position. To retract the flaps, do this task: Trailing Edge Flap System
Operation With Primary Control, TASK 27-51-00-860-801.
SUBTASK 27-51-00-710-008
(2) Do a test of the no-back brake in the transmissions:
(a) Put a stethoscope, COM-1797 on the applicable transmission to listen for a ratchet sound.
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.
(b) Extend the flaps to the 15 unit position and listen for a ratchet sound from the transmission.
To extend the trailing edge flaps, do this task: Trailing Edge Flap System Operation With
Primary Control, TASK 27-51-00-860-801.
NOTE: The ratchet sound is the no-back brake inside the transmission. It is necessary to
do the test again for the additional transmissions, or have additional people listen
to the transmissions.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
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(c) If it is necessary to do this test on another transmission, retract the flaps to the UP position.
To retract the flaps, do this task: Trailing Edge Flap System Operation With Primary
Control, TASK 27-51-00-860-801.
G. Put the Airplane Back to Its Usual Condition
SUBTASK 27-51-00-860-075
(1) Remove system B hydraulic power, do this task: Hydraulic System A or B Power Removal,
TASK 29-11-00-860-805.
SUBTASK 27-51-00-410-011
(2) Install the aft fairings for the inboard and outboard flaps:
(a) Do this task: Inboard Flap Support Aft Fairing Installation, TASK 27-51-18-400-802.
(b) Do this task: Outboard Flap Inboard Support Aft Fairing Installation,
TASK 27-51-28-400-804.
(c) Do this task: Outboard Flap Outboard Support Aft Fairing Installation,
TASK 27-51-28-400-802.
------------------------- END OF TASK ---------------------------
TASK 27-51-00-720-804
13. Trailing Edge Flap Load Relief System Functional Test
(Figure 501)
A. General
(1) This task does a functional check of the load relief system for the trailing edge flaps. It makes
sure that there is airspeed data from the ADIRU to the FSEU.
(2) In this procedure it is necessary to use the pitot static system to simulate airspeed.
B. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
27-51-00-860-801 Trailing Edge Flap System Operation With Primary Control (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)
34-11-00-790-803 Captain’s Total Air Pressure System - Pressurization (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.
737-600/700/800/900
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737-600-700-800-900 AIRCRAFT MAINTENANCE MANUAL飞机维护手册4(60)
