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747-400 MAINTENANCE MANUAL
SHELF ASSEMBLIES,
LEFT RECEIVER/TRANSMITTER
E5-1 AND E5-2
. WEATHER RADAR R/T MOUNT
RIGHT RECEIVER/TRANSMITTER SEE B
SEE A
FWD
A
WAVEGUIDE
RIGHT
SWITCH
FEEDER WAVEGUIDE SHELF ASSEMBLY,
LEFT FEEDER
E5-2 WAVEGUIDE
RIGHT R/T MOUNT
R/T MOUNT CONNECTOR
AND GROUND TERMINAL
SEE C
SHELF
ASSEMBLY,
E5-1
LEFT R/T
MOUNT INBD
R/T MOUNT SCREW, WASHER AND NUT (4 LOCATIONS ON EACH R/T MOUNT) FWD
WEATHER RADAR R/T MOUNT
B
Weather Radar R/T Mount Installation Figure 401A (Sheet 1)
E00369
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747-400
MAINTENANCE MANUAL
BLOWER SWITCH
CONNECTOR
SCREW, NUT
AND WASHER
(4 LOCATIONS)
CONNECTOR
DB138 OR
DB140
R/T MOUNT
WAVEGUIDE
GROUND TERMINAL GDB138 OR GDB140
FWD
FEEDER WAVEGUIDE
R/T MOUNT CONNECTOR AND GROUND TERMINAL
C
Weather Radar R/T Mount Installation
Figure 401A (Sheet 2)
E00373
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747-400 MAINTENANCE MANUAL
(2) Access Panel 117A Electronics Compartment Access Door
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747-400 MAINTENANCE MANUAL
E. Procedure
S 864-024
(1) Make sure these circuit breakers are open with DO-NOT-CLOSE tags attached:
(a)
P7 Overhead Circuit Breaker Panel
1) 7C7 WXR L RT
2) 7C19 WXR R RT
(b)
P6 Main Power Distribution Panel
1) 6K2 MN BAT CONT INVERTER PWR
2) 6K5 TRU - CONT INVERTER PWR
S 014-145
(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.
WARNING:_______THE CARGO FLOOR PANEL IS HEAVY. TO PREVENT INJURY, TWO PEOPLE ARE REQUIRED WHEN LIFTING OR MOVING THE CARGO FLOOR PANEL.
CAUTION: DO NOT PUSH OR PULL THE CARGO FLOOR PANEL ACROSS THE FLOOR
_______ BEAMS. THIS ACTION CAN CAUSE DAMAGE TO THE BLANKET MATERIAL.
(b) Carefully remove the cargo floor panel.
S 214-072
(3) Make sure the filter compartment screws are correctly attached to the R/T mount.
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