(3)
Remove the antenna flat plate.
(4)
Remove the antenna pedestal:
(a)
Disconnect the electrical connector DB143A from the antenna connector J1.
(b)
Disconnect the electrical connector DB143B from the antenna connector J2.
(c)
Release the quick disconnect that holds the waveguide Section 1 to the antenna waveguide.
CAUTION: DO NOT LOOSEN THE BOLTS ON THE SUPPORT ASSEMBLY OR
_______ THE MOUNT ASSEMBLY DURING THE REMOVAL OF THE ANTENNA PEDESTAL. THESE ARE ALIGNED AT THE FACTORY. IF THE MOUNT IS LOOSE OR NOT ALIGNED IN PITCH AND ROLL, DO THE WXR ANTENNA MOUNT MAINTENANCE PRACTICE IN 34-43-19/201. IF THE MOUNT IS NOT ALIGNED IN AZIMUTH OR THERE IS STRUCTURE DAMAGE TO THE RADOME SUPPORT STRUCTURE, HAVE A BOEING AOG TEAM DO A SPECIAL PROCEDURE. TELL THE BOEING SEATTLE AOG OFFICE.
(d)
Remove the two bottom mount bolts and washers on the antenna.
(e)
Loosen the two top mount bolts on the antenna.
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 UED TO HOLD THE ANTENNA.
CAUTION: ON AIRPLANES WITH COLLINS WEATHER RADAR;
_______ 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.
(f)
Lift the antenna up and forward of the two top mount bolts on the antenna.
(g)
Remove the antenna pedestal from the mount.
(5)
Put dust caps on the antenna electrical connectors and waveguide flange.
(6)
Ensure there are no cracks or damage to the mount assembly or support assembly.
EFFECTIVITY
ALL 03 Page 412 Apr 25/9834-43-03
9. Install Weather Radar Antenna (Fig. 402)
_____________________________
A. Open weather radar circuit breakers (Ref par. 3). Open nose radome, if required (Ref par. 3).
B. Remove protective covers from waveguide and antenna.
C. Place antenna on mount by placing it over two top bolts until it settles to mount.
WARNING: THE RCA AVQ-30X AND BENDIX RDR-1F ANTENNA ASSEMBLIES WEIGH
_______ 50 POUNDS THE BENDIX RDR-4A ANTENNA ASSEMBLY WEIGHS APPROXIMATELY 30 POUNDS AND THE COLLINS WXR-700X ANTENNA ASSEMBLY WEIGHS APPROXIMATELY 25 POUNDS. INSTALLATION REQUIRES TWO MEN AND A SECURE PLATFORM. HANDLE CAREFULLY TO PREVENT INJURY TO PERSONNEL OR DAMAGE TO PRECISION REFLECTOR. OBSERVE NO-HANDHOLD PLACARDS.
D. Place two lower bolts through antenna and mount.
E. Tighten all four mount bolts to 220-240 pound-inches.
F. Connect waveguide to antenna using quick-disconnecting spring clamp.
CAUTION: TO PREVENT DAMAGE TO ANTENNA, ENSURE THAT O-RING GASKET IS
_______ INSTALLED BETWEEN WAVEGUIDE AND ANTENNA ASSEMBLY.
G. Connect electrical connectors to antenna.
H. Remove Do-Not-Operate identifiers and close WEA RDR RT/1 and WEA RDR RT/2 circuit breakers and WEA RDR IND 1 and WEA RDR IND 2 circuit breakers on circuit breaker panel P7.
I. Airplanes with RCA AVQ-30X weather radar, perform operational test, 34-43-00 CONFIG 2, Weather Radar System -Adjustment/Test and Weather Radar VSWR Test, 34-43-04(Optional).
J. On airplanes with Bendix RDR-1F weather radar, perform operational test, 34-43-00 CONFIG 1, Weather Radar System -Adjustment/Test.
K. Airplanes with Bendix RDR-4A weather radar, perform operational test, 34-43-00 CONFIG 3, Weather Radar System -Adjustment/Test.
L. On airplanes with Collins WXR-700X weather radar, perform operational test, 34-43-00 CONFIG 4, Weather Radar System -Adjustment/Test.
10.
Install Planar Array (Fig. 403)
____________________
11.
AF 121, 122; SN 351-399; Install Planar Array (Fig. 403)
____________________
A. Remove protective cover from elevation rotary joint flexible waveguide flange.
B. References
(1)
AMM 24-22-00/201, Manual Control
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本文鏈接地址：747飛機維護手冊AMM CHAPTER 34 - NAVIGATION 第34章導航4(2)
