C. Procedure
 S 862-068
 (1)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P6, Main Power Distribution Panel 1) 6E3, PRI LE FLAP CONT GRP A AC 2) 6E4, PRI LE FLAP CONT GRP A DC 3) 6E5, PRI LE FLAP CONT GRP B AC 4) 6E6, PRI LE FLAP CONT GRP B DC 5) 6L21, LE FLAP ELEC CONT GRP B DRIVE 1 6) 6L22, LE FLAP ELEC CONT GRP A DRIVE 2 7) 6L23, LE FLAP ELEC CONT GRP A DRIVE 3 8) 6L24, LE FLAP ELEC CONT GRP A DRIVE 4

 (b)  
P414, Left Power Distribution Center 1) 414A5, LE FLAP ELEC DRIVE 1 2) 414A2, LE FLAP ELEC DRIVE 4

 (c)  
P415, Right Power Distribution Center 1) 415M35, LE FLAP ELEC DRIVE 2 2) 415B32, LE FLAP ELEC DRIVE 3

 TASK 27-81-00-042-026
 10. Extended Leading Edge Flaps Deactivation and Safety Locks Installation
______________________________________________________________________
 A. Special Tools and Equipment
 (1)  
17MIT65B04017, Leading Edge Flap Drive Unit Lock (Receptacle and Plug Cap)

 B.
References

 (1)  
AMM 36-00-00/201, Pneumatic System

 (2)  
SSM 27-81-01, SSM 27-81-02, SSM 27-81-03, SSM 27-81-04, SSM 27-81-05, SSM 27-81-06

 (3)  
WDM 27-81-11, WDM 27-81-12, WDM 27-81-21, WDM 27-81-22, WDM 27-81-31, WDM 27-81-32, WDM 27-81-41, WDM 27-81-42, WDM 27-81-81, WDM 27-81-82

 C.
Access

 (1)  
Location Zone 222 Control Cabin, RH 117 Electrical and Electronics Compartment - P414 Left

 Power Distribution Center 118 Electrical and Electronics Compartment - P415 Right
 Power Distribution Center 512 Krueger Flap Inboard, LH 523 Variable Camber Flap, LH 525 Variable Camber Flap, LH 535 Variable Camber Flap, LH 612 Krueger Flap Inboard, RH 623 Variable Camber Flap, RH 625 Variable Camber Flap, RH 635 Variable Camber Flap, RH
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 27-81-00
 ALL  ú ú 01 Page 210 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

KRUEGER FLAPS (GROUP A)
CENTER VARIABLE 
CAMBER FLAPS 
(INBOARD GROUP,  DRIVE UNIT NO. 4
GROUP A)  FOR SAFETY LOCK 
SEE  A 
CENTER VARIABLE 
CAMBER FLAPS 
(OUTBOARD GROUP, 
GROUP A) 

DRIVE UNIT NO. 3 CAMBER FLAPS OUTBOARD VARIABLE
FOR SAFETY LOCK (GROUP B)
SEE A
DRIVE UNIT NO. 2 FOR SAFETY LOCK
SEE A  PRIMARY DRIVE POWER RECEPTACLE
AIRPLANE WIRING
DRIVE UNIT NO. 1 FOR SAFETY LOCK ALTERNATE DRIVE POWER
SEE A RECEPTACLE
AIRPLANE WIRING
RECEPTACE AND PLUG CAPS (EXAMPLE, 2 LOCATIONS)
A
Leading Edge Flap Safety Lock Installation Figure 201
E23933
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 27-81-00
 ALL  ú ú 01 Page 211 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 D. Procedure
 S 862-063
 (1)
Do this task: "Pneumatic Power Removal" (AMM 36-00-00/201).

 S 862-065

 (2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6, Main Power Distribution Panel 1) 6E3, PRI LE FLAP CONT GRP A AC 2) 6E4, PRI LE FLAP CONT GRP A DC 3) 6E5, PRI LE FLAP CONT GRP B AC 4) 6E6, PRI LE FLAP CONT GRP B DC 5) 6L21, LE FLAP ELEC CONT GRP B DRIVE 1 6) 6L22, LE FLAP ELEC CONT GRP A DRIVE 2 7) 6L23, LE FLAP ELEC CONT GRP A DRIVE 3 8) 6L24, LE FLAP ELEC CONT GRP A DRIVE 4

 (b)  
P414, Left Power Distribution Center 1) 414A5, LE FLAP ELEC DRIVE 1 2) 414A2, LE FLAP ELEC DRIVE 4

 (c)  
P415, Right Power Distribution Center 1) 415M35, LE FLAP ELEC DRIVE 2 2) 415B32, LE FLAP ELEC DRIVE 3

 S 032-019
 (3)  
Disconnect the electrical connectors from the primary and alternate power receptacles on the drive units.

 S 482-020

 (4)  
Install the safety lock (receptacle and plug caps) on the disconnected electrical receptacles and plugs.
　
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