C. Procedure
S 864-243
(1)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a) P6 Load Control Center - Right
1) WEATHER RADAR R/T
(2)
Remove the screws that attach the radome to the fuselage bulkhead.
S 034-079
S 014-087
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.
(4)
Remove the antenna flat plate (AMM 34-41-11/401).
S 034-088
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A
737-300/400/500MAINTENANCE MANUAL
ELEVATION ZERO MONITOR A5
SEE A
GUIDE PINS
SEE B
MOUNTING FLANGE
FWD
WXR ANTENNA PEDESTAL
COTTER PIN
GUIDE PINS
ANTENNA
FLAT PLATE PEDESTAL
MOUNTING FLANGE
ELEVATION ZERO PEDESTAL
MONITOR A5 MOUNTING FLANGE
ELEVATION ZERO
MONITOR DIAL
CLAMP JAW ANTENNA
FLAT PLATE (SEE FIG 401)
ELEVATION ZERO MONITOR A5
A
CLAMP JAW BOLT
FLAT PLATE/PEDESTAL MATING DETAIL
B
Weather Radar Antenna Flat Plate Removal/Installation
Figure 402
A98875
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A
737-300/400/500MAINTENANCE MANUAL
S 024-089
(5) Remove the antenna pedestal:
(a)
Disconnect the electrical connector from the antenna pedestal.
(b)
Release the waveguide quick disconnect.
(c)
Disconnect the waveguide for the antenna pedestal.
(d)
If antenna mounting bolts have a drilled hole, Remove the twisted lockwire between each of the four antenna mount bolts and the antenna support assemblies (AMM 20-10-44/401).
(e)
Remove the two bottom mount bolts on the antenna pedestal.
(f)
Loosen the two top mount bolts on the antenna pedestal.
WARNING: USE TWO PERSONS AND A SAFELY INSTALLED WORKSTAND DURING
_______ THE REMOVAL OF THE ANTENNA PEDESTAL. THE ANTENNA PEDESTAL WEIGHS APPROXIMATELY 20 POUNDS.
BE CAREFUL WITH THE ANTENNA PEDESTAL DURING THE REMOVAL. CAREFULLY REMOVE THE ANTENNA PEDESTAL TO PREVENT INJURY TO YOU OR CAUSE DAMAGE TO THE ANTENNA PEDESTAL.
CAUTION: OBEY THE NO-HANDHOLD PLACARD ON THE ANTENNA PEDESTAL
_______ WAVEGUIDE. DAMAGE TO THE ANTENNA WILL OCCUR WHEN THE PEDESTAL WAVEGUIDE IS USED TO HOLD THE ANTENNA.
(g)
Lift the antenna pedestal up and forward of the two top mount bolts on the antenna base.
(h)
Remove the antenna pedestal from the antenna base.
S 034-065
(6) Put dust caps on the waveguide and the electrical connector on the antenna pedestal.
NOTE: If the antenna pedestal is not to be replaced immediately,
____ put dust caps on the electrical connector in the airplane.
TASK 34-41-11-424-015
5. WXR Antenna Installation
________________________
A. References
(1)
20-10-44/401, Lockwire
(2)
SWPM 20-20-00, Standard Wiring Practice Manual
(3)
AMM 24-22-00/201, Manual Control
(4)
34-41-00/501, Weather Radar System
(5)
34-41-02/501, Weather Radar System
B. Access
(1) Location Zone
101 Nose Radome
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