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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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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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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