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_______ PANEL. THE FLOOR PANELS BETWEEN THE BEAMS CAN FLEX AND CAUSE YOU TO 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 024-046
 (3)  Remove the R/T feeder waveguide section:
 (a)  
Remove the screws and washers from the R/T feeder flange and the waveguide switch port.

 (b)  
Hold the R/T feeder waveguide section.

 (c)  
Remove the screws and washers from flanges on the R/T mount waveguide and the R/T feeder waveguide.

 (d)  
Remove the R/T feeder waveguide and gaskets.

 S 024-120
 (4)  Put dust caps on the waveguide flanges.
 TASK 34-43-04-404-242
 3.  FREIGHTERS; Waveguide Installation (Fig. 401A)______________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 34-43-00/501, Weather Radar System

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 ALL  ú ú 02B Page 407 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

RIGHT RECEIVER/TRANSMITTER LEFT RECEIVER/TRANSMITTER
SEE A
FWD
WAVEGUIDE
SWITCH

TO ANTENNA
SECTION 4
SECTION 1 SEE B SECTION 3
WAVEGUIDE
AFT WAVEGUIDE TAB SEEC SEED
SUPPORT BRACKET DRAIN HOLE
SEE E
FWD SECTION 2
A

Weather Radar Waveguide Installation
Figure 401A (Sheet 1)

E00328
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
RIGHT FEEDER WAVEGUIDE
SHELF ASSEMBLY, E5-2
WAVEGUIDE SWITCH SUPPORT BRACKET
WAVEGUIDE SWITCH
SECTION 4
SECTION 3
A
747-400
MAINTENANCE MANUAL

RIGHT R/T MOUNT
R/T MOUNT WAVEGUIDE R/T MOUNT WAVEGUIDE
LEFT R/T
MOUNT
LEFT
FEEDER
WAVEGUIDE
FWD SHELF ASSEMBLY,
B
E5-1
FORWARD WAVEGUIDE SUPPORT BRACKET
FASTENERS
WAVEGUIDE
TAB

WAVEGUIDE
SECTION 2

C
Weather Radar Waveguide Installation Figure 401A (Sheet 2)
E00346
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 ú ú 05B Page 409 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

Weather Radar Waveguide Installation
Figure 401A (Sheet 3)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
E48229
A
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MAINTENANCE MANUAL

 (3)  AMM 53-52-01/201, Nose Radome
 B. Access
 (1)  Location Zone
 111 Radome
 112 Freighter Main Deck - Nose to First Door, Right

 C. Waveguide Section 1 Installation
 NOTE: To install waveguide Section 1, it is necessary to get into the
____
 nose radome.

 S 864-076
 (1)  Make sure these circuit breakers are open with DO-NOT-CLOSE tags attached:
　
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