737-300 400 500 AMM 飞机维护手册 导航 NAVIGATION 3(88)

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 1.  General_______
 A.  This subject has two tasks. The first task removes the weather radar (WXR) waveguide, the second task installs the WXR waveguide.
 B.  The waveguide has rigid and flexible sections. The different sections are shown on figure 401.
 TASK 34-41-21-024-001
 2.  Waveguide Removal_________________
 A.  References
 (1)  34-41-41/401, Weather Radar Receiver/Transmitter
 B.  Access
 (1)  
Location Zone
 101 Nose Radome
 102 Lower Nose Compartment

 (2)  
Access Zone
 1103 Forward Access Door

 

 C.  Procedure
 S 864-022
 (1)  AIRPLANES WITH SPERRY PRIMUS 90 WEATHER RADAR SYSTEMS; Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Load Control Center - Right
 1) WEATHER RADAR AC
 2) WEATHER RADAR DC

 S 864-024
 (2)  AIRPLANES WITH COLLINS WXR-700X WEATHER RADAR SYSTEMS; Open this circuit breaker and attach a DO-NOT-CLOSE tag:
 (a)  P6 Load Control Center - Right
 1) WEATHER RADAR R/T

 S 014-010
 (3)  Open the nose radome to get access to the WXR antenna:
 (a)  Remove the screws from the nose radome.
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A
737-300/400/500MAINTENANCE MANUAL
 (b)  
Use a suction cup to open the radome.

 (c)  
Lock the radome in its open position.

 S 014-011
 (4)  
Open the forward access door (1103) to get access to the waveguide sections forward of the receiver-transmitter (R/T).

 S 034-013

 (5)  
Remove the WXR R/T (Ref 34-41-41/401).

 S 024-016

 (6)  
Remove the waveguide sections:

 (a)  Disconnect section 1: 1) Release the quick-disconnect that holds section 1 to the
 WXR antenna.

 2)  Remove the four screws that attach section 1 to section 2.
 3)  Hold the forward end of section 2 to prevent force on the
 connections.

 4)  AIRPLANES WITH COLLINS WXR-700X WEATHER RADAR SYSTEMS; Remove the screw and clamp from section 1.
 5)  Remove the eight screws that attach section 1 to the forward pressure bulkhead.
 6)  Carefully remove section 1, with its pressure seal gasket, through the hole in the forward bulkhead.
 7)  Examine the waveguide section No. 1 (flexible) inner side for heavy layers of contamination. a) Replace waveguide section No. 1 with heavy layer of
 contamination (AMM 34-41-21/401). b) Do not try to clean or remove contamination from the flexible waveguide section.
 (b)  Disconnect section 2:
 1)  AIRPLANES WITH SPERRY PRIMUS 90 WEATHER RADAR SYSTEMS; Remove the four screws that attach section 2 to the waveguide switch.
 2)  AIRPLANES WITH COLLINS WXR-700X WEATHER RADAR SYSTEMS; Remove the four screws and the lock washers that attach section 2 to the R/T mount.
 3)  Remove section 2 and its gasket.
 (c)  AIRPLANES WITH SPERRY PRIMUS 90 WEATHER RADAR SYSTEMS; Disconnect section 3: 1) Remove the four screws that attach section 3 to the forward
 end of the R/T mount.

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A 737-300/400/500MAINTENANCE MANUAL
ANTENNA WAVEGUIDE INPUT PORT
WAVEGUIDE SECTION 1 ANTENNA

DUMMY LOAD (AFT OF WAVEGUIDE SWITCH)

WAVEGUIDE SWITCH
PRESSURE SEAL FLANGE AND GASKET
FWD WAVEGUIDE SECTION 2
SEE A
WAVEGUIDE FLANGE SCREW (4 EACH FLANGE)

WAVEGUIDE SWITCH
ELECTRICAL CONNECTOR

FORWARD PRESSURE BULKHEAD (STA 178)

WAVEGUIDE
SECTION 2 DRAIN HOLE
FWD WAVEGUIDE SECTION 1
A
RECEIVER-TRANSMITTER
R/T MOUNT TRAY
WAVEGUIDE SECTION 3 (FLEXIBLE)
　
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