D.
Prepare for Removal
S 492-062
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE LE FLAP SAFETY LOCKS. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT INSTALL THE SAFETY LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Do this task: "Extended Leading Edge Flap Deactivation and Safety Lock Installation" (AMM 27-81-00/201).
S 862-063
(2)
Do this task: "Electrical Power Removal" (AMM 24-22-00/201).
S 862-064
(3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel
1) 6L21 LE FLAP ELEC CONT GRP B DRIVE 1
2) 6L22 LE FLAP ELEC CONT GRP A DRIVE 2
3) 6L23 LE FLAP ELEC CONT GRP A DRIVE 3
4) 6L24 LE FLAP ELEC CONT GRP A DRIVE 4
5) 6E3 PRIM LE FLAP CONT GRP A AC
6) 6E4 PRIM LE FLAP CONT GRP A DC
7) 6E5 PRIM LE FLAP CONT GRP B AC
8) 6E6 PRIM LE FLAP CONT GRP B DC
(b)
P7 Overhead Circuit Breaker Panel
1) 7C10 FLT CONT ELEC 2L-AC
2) 7C11 FLT CONT ELEC 2L-DC
3) 7C12 FLT CONT ELEC 1L-AC
4) 7C13 FLT CONT ELEC 1L-DC
5) 7C14 FLT CONT ELEC 1R-AC
6) 7C15 FLT CONT ELEC 1R-DC
7) 7C16 FLT CONT ELEC 2R-AC
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MAINTENANCE MANUAL
8) 7C17 FLT CONT ELEC 2R-DC
(c) P414 Power Distribution Center - Left
1) 414A5 LE FLAP ELEC DRIVE 1
2) 414A2 LE FLAP ELEC DRIVE 4
(d) P415 Power Distribution Center - Right
1) 415M35 LE FLAP ELEC DRIVE 2
2) 415B32 LE FLAP ELEC DRIVE 3
S 862-065
(4) Do this task: "Pneumatic Power Removal" (AMM 36-00-00/201).
S 862-066
(5) Do this task to depressurize hydraulic systems No. 1 and 4:
"Hydraulic System Depressurization" (AMM 29-11-00/201).
E. Remove the Directional Control Servomotor Assembly
S 032-067
(1) Disconnect the electrical connector P101 (44).
S 032-068
(2) Disconnect these primary (pneumatic) drive power electrical
connectors (13):
(a) DM876 and DM885 (PDU No. 1)
(b) DM878 and DM883 (PDU No. 2)
(c) DM879 and DM882 (PDU No. 3)
(d) DM880 and DM881 (PDU No. 4)
S 032-069
(3) Disconnect these alternate (electrical) drive power connectors (33):
(a) DM876B and DM885B (PDU No. 1)
(b) DM878B and DM883B (PDU No. 2)
(c) DM879B and DM882B (PDU No. 3)
(d) DM880B and DM881B (PDU No. 4)
S 022-070
(4) Remove the directional control servomotor assembly (Fig. 201):
NOTE: A ball-end allen wrench will make the removal and
____ installation of the screws easier and faster.
(a) Remove the wire bundle clips (45).
(b) Remove the connector mounting bracket (46).
(c) Remove the four screws (42) from the servomotor (24).
(d) Remove the servomotor assembly (24).
(e) Put a cover on the opening in the drive unit.
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747-400 MAINTENANCE MANUAL
TASK 27-81-03-402-071
7. Directional Control Servomotor Assembly Installation____________________________________________________
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