NOTE: If the antenna is not to be replaced immediately, put
____ dust caps on the electrical connector in the airplane.
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A
737-300/400/500MAINTENANCE MANUAL
ELEVATION SWITCH
ASSEMBLY GUARD ANTENNA FLAT PLATE RADIATOR
BULKHEAD

AZIMUTH
INDEX SCALE
ELEVATION
MOUNT BOLTS
INDEX SCALE

(4 LOCATIONS)
(RIGHT SIDE)

WAVEGUIDE (REF)
AZIMUTHELECTRICAL SCAN SWITCHCONNECTOR
WAVEGUIDE
QUICK-DISCONNECT

SPERRY PRIMUS 90 ANTENNA
ANTENNA FLAT
PLATE RADIATOR

MOUNT BOLTS (4 LOCATIONS)ELEVATION AND AZIMUTH SCAN SWITCHES BULKHEAD
WAVEGUIDE
QUICK-ELECTRICAL
DISCONNECT CONNECTOR
WAVEGUIDE

COLLINS ANTENNA Weather Radar Antenna Installation Figure 401
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A
737-300/400/500MAINTENANCE MANUAL
 TASK 34-41-11-024-199
 3.  BEJ WITH COLLINS WXR-700X WXR; Weather Radar Antenna Flat Plate Removal (Fig. 402)________________________________________
 A.  Access
 (1)  Location Zone
 111 Radome

 B.  Procedure
 S 864-240
 (1)  Open this circuit breaker and attach a DO-NOT-CLOSE tag:
 (a)  P6 Load Control Center - Right
 1) WEATHER RADAR R/T

 S 034-073
 (2)  Remove the screws that attach the radome to the fuselage bulkhead.
 S 014-200
 WARNING: DO NOT OPEN THE NOSE RADOME IF THE WIND IS MORE THAN 15 KNOTS.
_______ IF YOU OPEN THE NOSE RADOME IN A WIND, THE RADOME CAN MOVE QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Open the radome and hold it in the open position by the installation of the support rods on each side.

 S 024-074

 (4)  
Remove the antenna flat plate.

 (a)  
Remove all lockwire from the clamp jaw bolts on the antenna pedestal.

 (b)  
Turn the two clamp jaw bolts on the antenna pedestal counterclockwise to open the jaws.

 NOTE: Make sure that the A5 ring clamp on the elevation zero
____ monitor does not block or touch the flat plate.
 Do not move the ring clamp on the elevation zero monitor. Make sure the monitor dial continues to show 0 degrees. The elevation monitor will not continue to be aligned.
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A
737-300/400/500MAINTENANCE MANUAL
 WARNING: DURING A FLAT PLATE REMOVAL, USE TWO PERSONS AND A SAFELY
_______ INSTALLED WORKSTAND. THE FLAP PLATE WEIGHS APPROXIMATELY 5 POUNDS.
 BE CAREFUL WITH THE FLAT PLATE DURING THE REMOVAL. CAREFULLY REMOVE THE FLAT PLATE TO PREVENT INJURY TO YOU OR DAMAGE TO THE FLAT PLATE.
 (c)  
Carefully lift the flat plate away from the antenna pedestal.

 (d)  
Put dust caps on the waveguide and the electrical connector on the antenna.

 NOTE: If the flat plate is not to be replaced immediately,
____ put dust caps on the electrical connector in the airplane.
 TASK 34-41-11-024-090
 4.  BEJ WITH COLLINS WXR-700X WXR; Weather Radar Antenna Pedestal Removal (Fig. 401, Fig. 402)
______________________________________
 A.  References
 (1)  
AMM 20-10-44/401, Lockwire

 (2)  
AMM 34-41-11/401, Weather Radar Antenna Flat Plate

 B.  Access
 (1)  Location Zone
 101 Nose Radome
　
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