Message Name:

WEATHER RADAR (WXR) SYSTEM FAULT

The amber WX legend and the related two-digit fault code(s) show in the status window of the Multi Function Display (MFD).

• SCAN Switch
• XMIT Switch
• Weather Radar Receiver/Transmitter and Antenna (A125)
• Weather Radar Control Panel 1 (A122)
• Weather Radar Control Panel 2 (A92)
• Weather Radar Switch

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: The WX legend and fault codes show on the MFD only when the WXR system is in the test mode and a fault occurs.

WARNING: BEFORE YOU CONNECT ELECTRICAL POWER TO THE AIRCRAFT, MAKE SURE THAT YOU SET THE WEATHER RADAR CONTROL-PANELS TO “OFF” OR “SBY” AND THE “TILT” CONTROL TO THE FULLY UP POSITION. THIS IS TO GIVE PROTECTION TO PERSONNEL AND EQUIPMENT FROM HIGH-ENERGY MICROWAVE TRANSMISSIONS.

WARNING: DO NOT OPERATE OR DO A TEST OF THE WEATHER RADAR SYSTEM IF THE NOSE OF THE AIRCRAFT (IN THE FORWARD 270 DEGREES SECTOR) IS IN ONE OF THE CONDITIONS THAT FOLLOW:

• LESS THAN 10 FT (3 M) FROM FLAMMABLE MATERIALS
• LESS THAN 33 FT (10 M) FROM PERSONNEL
• LESS THAN 165 FT (50 M) FROM LARGE METAL OBJECTS
• LESS THAN 330 FT (100 M) FROM ALL REFUELING OPERATIONSTHIS IS TO GIVE PROTECTION TO PERSONNEL AND EQUIPMENT FROM HIGH-ENERGY MICROWAVE TRANSMISSIONS

1. Access CAIMS Active or Stored Faults. Select displayed message from menu below:
   Select CAIMS Message3440001WX - INTERNAL CRC FAULT 013440002WX - INTERNAL IOP FAULT 023440003WX - INTERNAL EEPROM FAULT 033440004WX - INTERNAL RAM FAULT 043440005WX - INTERNAL FPGA FAULT 053440006WX - WX STC DAC FAULT 063440007WX - WX HVPS FAULT 073440008WX - INTERNAL DSP FAULT 103440009WX - WX MAGNETRON FAULT 11A3440010WX - RADOME/ANTENNA ELEV FAULT 133440011WX - RADOME/ANTENNA AZ FAULT 143440012WX - RTA OVER TEMP FAULT 153440013WX - WX XMIT POWER FAULT 163440014WX - WX CONTROLLER/RTA FAULT 203440015WX - WX AGC FAULT 213440016WX - WX RECEIVER TEST FAULT 223440017WX - WX AFC FAULT 243440018WX - IRS/WRG/WX RTA FAULT 27A3440019WX - DADC/WRG/WX RTA FAULT 30A3440020WX - DADC/WRG/WX RTA FAULT 33A3440021WX - WX RTA SCAN SWITCH OFF 343440022WX - WX RTA TRANSMIT SWITCH OFF 353440023WX - INVALID STRAP/WX RTA FAULT 36A3440025WX - IRS/WRG/WX RTA FAULT 30B3440026WX - IRS/WRG/WX RTA FAULT 33B3440027WX - WX IOP FAULT 36B3440028WX - WX HVPS FAULT 11B3440029WX - DAU1/WRG/FWC 37 FAULT 373440031WX - INTERNAL POWER SUPPLY FAULT3440032WX - WX INTERNAL WD RESET3440033WX - WX MILD MAGNETRON FAULT3440034WX - WXPD/ARINC 453 BUS BUSY3440035WX - WX AFC UNLOCK

   1. If any of the CAIMS message is displayed, troubleshoot them first and continue with next step.
   2. If no associated CAIMS message is displayed, continue with next step.

2. Check if the SCAN and XMIT switches are set to ON position.

   1. If the switches are in ON position, do close out.
   2. If the switches are not set to ON position, continue with next step.

3. Use a non-conductive tool to change the position of the switch.
4. Do close out.