03/17/21
Message Overview:
Message Description:
No R-ADC data received at the R-IOC and 3-of (AHC2, MFD2, PFD2, MFD1, PFD1, SPC-B).
Possible Causes:
- Right Air Data Computer (ADC) (A2)
- Reversion Select Panel (PL27)
- Relay (K130)
- Right Secondary Power Center (SPC) (A38)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Removal of the Secondary Power Center (SPC) | AMM 24-62-01-000-801 |
| Installation of the Secondary Power Center (SPC) | AMM 24-62-01-400-801 |
| Removal of the Secondary Power Center (SPC) Relays | AMM 24-62-04-000-801 |
| Installation of the Secondary Power Center (SPC) Relays | AMM 24-62-04-400-801 |
| Removal of the Reversion Select Panel | AMM 31-61-13-000-801 |
| Installation of the Reversion Select Panel | AMM 31-61-13-400-801 |
| Removal of the Air Data Computer | AMM 34-13-01-000-801 |
| Installation of the Air Data Computer | AMM 34-13-01-400-801 |
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices - Wire Repair | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Reset AIR DATA 2 (CB2-C1) circuit breaker.
- If system check passes, do close out.
- If fault remains, continue with next step.
- Confirm AIR DATA Switch (Reversion Select Panel) and Relay K130 (Right Secondary Power Center) are operating as per drawing [presence of 28 VDC / Grounds at Right ADC connector A2P1]. Repair/replace as required.
- If system check passes, do close out.
- If fault remains, continue with next step.
- Replace Right ADC.
- Do close out.