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737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(b) Install the plug [51] and the packing [52] in the drain port.
(c) Tighten the plug [51] to 110-130 pound-inches more than the run-on torque.
(d) Install lockwire on the plug [51].
SUBTASK 27-51-51-610-001
(5) Fill the power drive unit [21] with fluid, D00467. To fill it, (TASK 12-22-51-610-801).
SUBTASK 27-51-51-790-001
(6) Make sure there are no hydraulic leaks from the power drive unit [21]:
(a) Do this task:Trailing Edge Flap System Operation With Primary Control,
TASK 27-51-00-860-801
(b) Operate the flaps full up to full down a minimum of 3 cycles while checking for leaks from
the new PDU seal.
H. Put the Airplane Back to Its Usual Condition
SUBTASK 27-51-51-440-003
(1) Do this task: Trailing Edge Flap System Reactivation, TASK 27-51-00-440-801.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Oct 10/2007
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FLAP POWER DRIVE UNIT - ADJUSTMENT/TEST
1. General
A. This procedure has a functional test of the flap power drive unit.
TASK 27-51-51-000-802
2. Flap Power Drive Unit Functional Test
(Figure 501)
A. 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)
B. Location Zones
Zone Area
117 Electrical and Electronics Compartment - Left
118 Electrical and Electronics Compartment - Right
211 Flight Compartment - Left
212 Flight Compartment - Right
C. Access Panels
Number Name/Location
117A Electronic Equipment Access Door
D. Prepare for the Test
SUBTASK 27-51-51-860-008
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-51-51-010-003
(2) To get access to the main equipment center, do this step:
Open this access panel:
Number Name/Location
117A Electronic Equipment Access Door
SUBTASK 27-51-51-860-009
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.
(3) Supply system B hydraulic power, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
NOTE: Do not use the EMDP for this test. It does not create enough pressure to meet the
extend and retract time limits.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-51-51
Page 501
Oct 10/2003
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
E. Flap Power Drive Unit Functional Test
SUBTASK 27-51-51-730-001
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) Do a test of the primary operation of the trailing edge flaps:
(a) Move the flap control lever to the UP position and wait for the flaps to reach the UP position.
(b) Push the ON/OFF button on the front panel of the FSEU to turn on the display.
NOTE: The display will show EXISTING FAULTS?
(c) Do a check of the flap lever sensor, position sensors and skew sensor inputs to the FSEU:
1) Push the down arrow until OTHER FUNCTNS? shows on the display.
2) Push the YES button to select OTHER FUNCTNS? on the FSEU.
3) Push the down arrow until I/O MONITOR? shows on the display.
4) Push the YES button to select I/O MONITOR? from the menu.
5) Push the down arrow until SYNCHRO INPUTS? shows on the display.
6) Push the YES button to select SYNCHRO INPUTS? from the menu.
7) Make sure the inputs for the sensors are in the limits shown in (Table 501) for the UP
position.
NOTE: Push the arrow keys to step through the sensor values.
Table 501/27-51-51-993-803
Display (Sensor)
Sensor Input (Flap Position)
UP 1-Unit 40-Units
LVR POS -2.8 to 2.8 13.8 to 21.4 105.4 to 110.9
L FL POS -3.7 to 1.8 34.5 to 40.8 267.1 to 273.3
R FL POS -3.7 to 1.8 34.5 to 40.8 267.1 to 273.3
F1 SKEW 295.7 to 311.0 12.2 to 29.1 224.4 to 242.1
F2 SKEW 330.5 to 346.0 60.9 to 78.1 279.2 to 296.9
F3 SKEW 0.0 to 13.2 82.9 to 99.2 288.7 to 305.5
　
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