(4) Do this task: "Removal of the Door Locks from the Body Landing Gear" (AMM 32-00-30/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FLAP ALTERNATE DRIVE MOTOR - ADJUSTMENT/TEST
____________________________________________
1. General_______
A. There is one task in this procedure to do a test of the trailing edge flap alternative drive motors. This test measures the current in each of the three phases which power the drive motor.
TASK 27-51-17-725-002
2. Functional Test - Trailing Edge Flap Alternate Drive Motor__________________________________________________________
A. Special Tools and Equipment
(1)
G27025-1, Test Equipment - TE Flap Alternate Drive Motor Current (Test Box)
B.
Standard Tools and Equipment
(1)
27STD, Multimeter
(2)
Y8101, Inductive Current Probe
C.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 27-81-00/201, Leading Edge Flaps
(3)
AMM 32-00-30/201, Landing Gear Door Locks
D.
Access
(1)
Location Zones
137, 138 Body Landing Gear Well
221, 222 Control Cabin
E.
Prepare For The Test
S 095-003
(1) Make sure the ground lockpins for the landing gear are installed.
S 095-004
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
(3)
Do this task: "Leading Edge Flaps Deactivation" (AMM 27-81-00/201).
S 865-006
(4)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6, Main Power Distribution Panel
1) 6L19, TE FLAP ELEC CONT OTBD
S 045-005
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747-400 MAINTENANCE MANUAL
2) 6L20, TE FLAP ELEC CONT INBD
(b)
P415, Power Distribution Center - Right
1) 415A32, TE FLAP ELEC INBD
2) 415M38, TE FLAP ELEC OTBD
F.
Do the Trailing Edge Flap Alternate Drive Motor Test.
S 865-007
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 725-008
(2)
Do the inboard drive motor test:
(a)
Remove the electrical connector D625 from the inboard drive motor.
(b)
Connect the test box to the inboard drive motor. 1) Connect the test box cable G27025-4 connector P2 to the motor. 2) Connect the test box cable connector J2 to the connector DM625.
3) Connect the cable connector P1 to the test box connector J1.
(c)
Remove the DO-NOT-CLOSE tags and close these circuit breakers: 1) P6, Main Power Distribution Panel a) 6L20, TE FLAP ELEC CONT INBD
2) P415, Power Distrubution Center - Right a) 415A32, TE FLAP ELEC INBD
(d)
Put the multimeters and current probes on the cables A, B and C on the test box.
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