S 024-066

 (11)
 Put covers on the two air ducts on the R/T mount.

 TASK 34-43-05-004-015
 3.  FREIGHTERS; Receiver/Transmitter Mount Removal (Fig. 401A)
__________________________________
 A.  General
 (1)  The R/T mount for the left R/T (B138) is attached to the E5-1 shelf assembly below the floor compartment between station 180 and 200.The R/T mount for the right R/T(B140) is attached to the E5-2 shelf assembly below the floor compartment between station 200 and 220.To remove the left or right R/T mount, you must electrically and mechanically disconnect it from the E5-( ) shelf assembly.
 B.  Special Tools and Equipment
 NOTE: Use the correct insertion/extraction tool found in one of the two
____ crimp tool kits shown below. See crimp tool kit connector index
 (1)  
Graphic Datakits International, Burndy P/N J1276-1
 Insertion/Extraction Tool

 (2)  
Daniels Mfg. Corporation, Astro P/N ATB3062-2
 Insertion/Extraction tool.

 C.  References
 (1)  
AMM 34-43-02/401 Weather Radar Receiver/ Transmitter

 (2)  
SWPM 20-20-11, Lockwire

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A
747-400
MAINTENANCE MANUAL

E30-1 UPPER ANGLE ASSEMBLY
EQUIPMENT
RACK, E30

E30-1 UPPER SHELF SCREW AND WASHER (6 LOCATIONS) ELECTRONIC EQUIPMENT RACK, E30 . WEATHER RADAR R/T MOUNT
SEE A
R/T MOUNT SCREW,WASHER, AND NUT (8 LOCATIONS)  WAVEGUIDES FEEDER 
DUAL R/T MOUNT 

E30 RACK AIR PLENUM
AIR HOSE WIRE BUNDLES
AIR HOSEAEO 302 CLAMPDISCONNECT PANEL
SEE B
WEATHER RADAR R/T MOUNT
A

Weather Radar R/T Mount Installation
Figure 401 (Sheet 1)

WAVEGUIDE SWITCH
WAVEGUIDE SWITCH ELECTRICAL CONNECTOR
AIR HOSE
R/T MOUNT CONNECTORS AND GROUND TERMINALS
SEE C
E00353
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

D41898P
D41892P
D41891P
D41893P

D41890P D41886P
D41888P
D41895P
D41894P
FWD OUTBD D41887P
AEO 302 DISCONNECT PANEL R/T MOUNT
B
SCREW, NUT AND WASHER (4 LOCATIONS)
CONNECTOR DB138
GROUND TERMINAL
R/T MOUNT GD138
WAVEGUIDE
LEFT FEEDER WAVEGUIDE
GROUND WIRES
WAVEGUIDECONNECTOR DB140 SWITCH
GROUND
WAVEGUIDE TERMINAL
SECTION 5 GD140
TO ANTENNA
WIRE BUNDLE (4 LOCATIONS) GASKET WAVEGUIDE SWITCH CONNECTOR INBD
SCREW, WASHER
RIGHT FEEDER
WAVEGUIDE R/T MOUNT CONNECTORS AND GROUND TERMINALS

FWD
C
Weather Radar R/T Mount Installation Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
 D. Access
 (1)  Location Zone
 112 Freighter Main Deck-Nose to First Door,Left
 E. Procedure
 S 864-016
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7C7 WXR L RT
 2) 7C19 WXR R RT

 S 014-143
 (2)  Get access to the R/T mounts below the compartment floor.
 (a)  Release the 18 fasteners that hold the cargo floor panel.
 WARNING: STEP ONLY ON THE FLOOR BEAMS WHEN YOU REMOVE CARGO FLOOR
_______ PANEL. THE FLOOR PANELS BETWEEN THE BEAMS CAN FLEX AND CAUSE TO YOU FALL. IF YOU DO NOT OBEY THESE INSTRUCTIONS, INJURY TO PERSONNEL AND/OR DAMAGE TO THE WEATHER RADAR EQUIPMENT OR BLANKET MATERIAL CAN OCCUR.
　
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