TASK 34-43-02-404-005
 3. Receiver/Transmitter Installation
_________________________________
 A. References
 (1)  
AMM 06-09-01/201, Body Section 41 Access Doors and Panels

 (2)  
AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Modules

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 34-43-00/501, Weather Radar System

 (5)  
IPC 34-43-02 Fig. 1

 B. Access
 (1)  
PASSENGER AIRPLANES;

 Location Zones 116 Area Between Nose Gear Well and Fuselage, RH

 (2)  
FREIGHTER AIRPLANES;

 Location Zones 112 Freighter Main Deck- Nose to First Door, Left

 (3)  
PASSENGER AIRPLANES;

 Access Panels 117A Electronic Compartment Access Door
 C. Procedure
 S 864-015
 (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

 S 014-110
 (2)  
PASSENGER AIRPLANES; Open the access door to the 117AL electronics compartment to get to the R/Ts (AMM 06-09-01/201).

 S 424-065

 (3)  
Remove the dust cap on the electrical connector/waveguide flange on the left R/T mount (DB138) or the right R/T mount (DB140).

 S 424-066

 (4)  
Remove the dust cap on the electrical connector/waveguide flange on the left R/T (DB138) or the right R/T (DB140).

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 ALL  ú ú 12 Page 403 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 424-039
 (5)  Do this task to install the receiver/transmitter in the R/T mount:
 Rack Mounted Electrical/Electronic Module - Installation
 (AMM 20-11-22/401).
 S 424-111
 (6)  PASSENGER AIRPLANES;
 Do this task to install the receiver/transmitter in the R/T mount:
 Rack Mounted Electrical/Electronic Module - Installation
 AMM 20-11-22/401).
 CAUTION: HOLD THE R/T AWAY FROM THE LOWER E30 SHELF. IF THE R/T_______
 TOUCHES THE UNITS INSTALLED IN THE LOWER E30 SHELF, THE
 R/T COULD DAMAGE THIS EQUIPMENT.
 (a) Make sure the R/T does not touch any of the electrical
 equipment on the lower E30 shelf.
 S 424-113
 (7)  FREIGHTER AIRPLANES;
 Install the left or the right receiver/transmitter on the R/T mount
 below the cargo floor panels between stations 180 and 220.
 (a) Put the receiver/transmitter on the R/T mount and push it fully
 to the rear to engage the mating connector on the R/T mount.
 (b) Engage the holddown knobs with the R/T mount holddown clamps
 and tighten the knobs to attach the R/T to the R/T mount.
 S 864-009
 (8)  Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a) P7 Overhead Circuit Breaker Panel
 1) 7C7 WXR L RT
 2) 7C19 WXR R RT
 S 864-038
 (9)  Supply electrical power (AMM 24-22-00/201).
 S 714-026

 (10) Do the operational test or the ground test for the weather radar system - adjustment/test" (AMM 34-43-00/501).
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 ALL  ú ú 11 Page 404 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 414-114
 (11)
 PASSENGER AIRPLANES; Close the access door to the 117AL electronics compartment (AMM 06-09-01/201).

 S 414-116

 (12)
 FREIGHTER AIRPLANES; Install the cargo floor panel on the floor beams above the receiver/transmitters.

 WARNING:_______ STEP ONLY ON THE FLOOR BEAMS WHEN YOU REMOVE CARGO FLOOR
 PANEL.  THE FLOOR PANELS BETWEEN THE BEAMS CAN FLEX WHEN
 STEPPED UPON AND CAN CAUSE YOU TO FALL.  IF YOU DO NOT
　
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