27-58-01
 ALL  ú ú 01 Page 409 ú Jun 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 27-58-01-004-023
 4.  Removal of the RVDT Transmitter at the Flap Power Package (Fig. 401)_________________________________________________________
 A. References
 (1)  
AMM 27-51-00/201, Trailing Edge Flap System

 (2)  
AIPC 27-51-09, Fig. 1

 (3)  
AIPC 27-51-09, Fig. 3

 (4)  
SSM 27-58-01

 (5)  
WDM 27-58-11

 B.
Access

 (1)  
Location Zone 137 Left Body Gear Wheel Well - Inbd Power Pack Transmitter 138 Right Body Gear Wheel Well - Outbd Power Pack Transmitter

 C.
Procedure

 S 864-059
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 CAUTION: RETRACT THE TE FLAPS HYDRAULICALLY TO THE FULL UP POSITION
_______ FOR THE RVDT TRANSMITTER REMOVAL AT THE FLAP POWER PACKAGE. DO NOT RETRACT THE TE FLAPS BY THE ELECTRICAL MODE. IF YOU USE THE ELECTRICAL MODE, YOU CAN CAUSE DAMAGE TO THE FLAPS WHEN YOU OPERATE THEM IN THE HYDRAULIC MODE.
 (1)  
Do this task to retract the TE flaps to the full up position: "Trailing Edge Flap Retraction with Hydraulic Power" (AMM 27-51-00/201).

 (2)  
Do this task: "Trailing Edge Flap Deactivation" (AMM 27-51-00/201).

 S 864-025

 (3)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P7, Overhead Power Distribution 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

 S 864-056
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-58-01
 ALL  ú ú 01 Page 410 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 7) 7C16, FLT CONT ELEC 2R AC 8) 7C17, FLT CONT ELEC 2R DC
 S 014-026
 (4)  
Get access to the applicable TE flap power package in the wheel well of the body gear.

 S 034-027

 (5)
Remove the electrical connector from the applicable transmitter:

 (a)  
DM7889, Inboard Power Package Transmitter

 (b)  
DM7892, Outboard Power Package Transmitter

 S 034-029
 (6)  
Remove two bolts and washers that attach the RVDT transmitter to the flap power package.

 S 024-030

 (7)  
Remove the RVDT transmitter from the flap power package.

 TASK 27-58-01-404-031
 5.  Installation of the RVDT Transmitter at the Flap Power Package (Fig. 401)______________________________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 27-51-00/201, Trailing Edge Flap System

 (3)  
AIPC 27-51-09, Fig. 1

 (4)  
AIPC 27-51-09, Fig. 3

 (5)  
SSM 27-58-01

 (6)  
WDM 27-58-11

 B.
Access

 (1)  
Location Zone 137 Left Body Gear Wheel Well - Inbd Power Pack Transmitter 138 Right Body Gear Wheel Well - Outbd Power Pack Transmitter

 C.
Install the RVDT Transmitter

 S 864-032
 (1)  
Make sure the primary indicator windows on the transmitter are in the zero (neutral rig) position.

 (a)  
Make sure the primary indicator dot shows in the primary indicator window.

 (b)  
Make sure the line on the primary or the fine adjustment indicator window is in the tolerance band (Fig. 401, views D and E or views H and I).

 (2)  
Do this task: "Trailing Edge Flap Activation" (AMM 27-51-00/201).

 S 864-057
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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