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 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.
 (a)
Put the cargo floor panel on the floor beams.

 (b)
Tighten the 18 fasteners that hold the cargo floor panel. S 864-032

 (13) Remove electrical power if it is not necessary (AMM 24-22-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 07 Page 405 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 WEATHER RADAR ANTENNA - REMOVAL/INSTALLATION
____________________________________________
 1.  General_______
 A.  This procedure has these tasks:
 (1)
Weather radar antenna removal.

 (2)
Weather radar antenna planar array removal.

 (3)
Weather radar antenna drive assembly removal.

 (4)
Weather radar antenna installation.

 (5)
Weather radar antenna planar array installation.

 (6)
Weather radar antenna drive assembly installation.

 B.  This subject has six tasks which include three removal and three installation tasks. Removal tasks include the removal of the antenna, antenna array and antenna drive assembly. The installation tasks include the installation of the antenna, antenna planar array and antenna drive assembly. The antenna removal task has these parts:
 (1)
Open the nose radome

 (2)
Remove the antenna.

 C.  The removal task for the antenna planar array has these parts:
 (1)
Open the nose radome

 (2)
Remove the antenna array.

 D.  The removal task for the antenna drive assembly has these parts:
 (1)
Open the nose radome

 (2)
Remove the antenna array

 (3)
Remove the antenna drive assembly.

 E.  The installation task for the antenna has these parts:
 (1)
Install the antenna

 (2)
Do a weather radar (WXR) system test

 (3)
Close the nose radome.

 F. The installation task for the antenna planar array has these parts:
 (1)
Install the antenna planar array

 (2)
Do a WXR operational test

 (3)
Close the nose radome.

 G. The installation task for the antenna drive assembly has these parts:
 (1)
Install the antenna drive assembly

 (2)
Install the antenna planar array

 (3)
Do a WXR system test

 (4)
Close the nose radome.

 TASK 34-43-03-004-061
 2.  Weather Radar Antenna Removal (Fig. 401)_____________________________
 A.  References
 (1) AMM 53-52-01/201, Nose Radome
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 34-43-03
 ALL  ú ú 01 Page 401 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (2)  IPC 34-43-03 Fig. 1
 B. Access
 (1)  Location Zone
 111 Radome

 C. Procedure
 S 864-070
 (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 014-003
 (2)  Open the nose radome (AMM 53-52-01/201).
 S 004-059
 CAUTION: WHEN YOU REMOVE OR INSTALL THE ANTENNA OR AN ANTENNA ASSEMBLY,
_______ BE CAREFUL TO CONTROL THE WORKSTAND AND EQUIPMENT. THE WORKSTAND OR OTHER EQUIPMENT COULD CAUSE DAMAGE THE LOCALIZER ANTENNA OR OTHER RADOME EQUIPMENT.
 DO NOT USE THE LOCALIZER ANTENNA AS A SUPPORT. DAMAGE TO THE LOCALIZER ANTENNA WILL OCCUR.
　
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