04/06/21
Message Overview:
Message Description:
This notification occurs when invalid/incorrect ARINC 429 inputs are received by the WXR while there is no absence of the left (L-IOC-2) or right (R-IOC-2) control bus.
Possible Causes:
- Weather Radar Receiver/Transmitter and Antenna (WXR RTA)(A3)
- L Global Positioning System 1 (GPS) (A25)
- R Global Positioning System 2 (GPS) (A24)
- L Air Data Computer 1 (ADC) (A1)
- R Air Data Computer 2 (ADC) (A2)
- Flight Management Computer 1 (FMC) (A4-FMC1)
- Flight Management Computer 2 (FMC) (A4-FMC2)
- Inertial Reference System 1 (IRU) (A233)
- Inertial Reference System 2 (IRU) (A232)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
This message is NEVER logged and can only be seen in the current fault menu.
MultiScan™ function is not available due to an absence of any of the following labels:
- GPS Alt Label 076
- HIL Label 130
- VIL Label 133
- Baro Altitude Label 203
- Computed Airspeed Label 206
- True Air speed Label 210
- Static Air Temp Label 213
- Latitude Label 310
- Longitude Label 311
- Ground Speed Label 312
- Track Angle Label 313
- True Heading Label 314
- Drift Angle Label 321
- Pitch Angle Label 324
- Roll Angle Label 325
Quick Links:
| Removal of the Integrated-Avionics Processor System (IAPS) Card Cage (ICC) | AMM 31-45-01-000-801 |
| Installation of the Integrated-Avionics Processor System (IAPS) Card Cage (ICC) | AMM 31-45-01-400-801 |
| Removal of the Air Data Computer | AMM 34-13-01-000-801 |
| Installation of the Air Data Computer | AMM 34-13-01-400-801 |
| Removal of the Inertial Reference Unit (IRU) | AMM 34-45-01-000-801 |
| Installation of the Inertial Reference Unit (IRU) | AMM 34-45-01-400-801 |
| Removal of the Global Positioning Receiver | AMM 34-55-01-000-801 |
| Installation of the Global Positioning Receiver | AMM 34-55-01-400-801 |
| Removal of the Flight Management Computer (FMC) | AMM 34-61-01-000-801 |
| Installation of the Flight Management Computer (FMC) | AMM 34-61-01-400-801 |
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices - Repair Wiring | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Verify MDC for any faults related to the following systems outputs: GPS, ADC, FMC, AHRS, IRS.
- Troubleshoot the defective system according to the B3 code found.