# SDR HNAA2022022400115

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2022
- Submitted: February 24, 2022
- Operation: Air carrier
- Aircraft: [N635AE](https://openairdocs.org/aircraft/N635AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145158
- Aircraft time: 48,145 hours, 45,428 cycles
- System (JASC): [5100 · Standard Practices/Structures](https://openairdocs.org/jasc/5100)
- Part: Not Reported
- Condition: Not Reported
- Stage of operation: DE
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2022022400115

## Discrepancy

PDIS  CLT   19FEB22  DURING FLIGHT LOST RMU 1 PFD1 NAV 1 FMS 1 AND MFD2 AND REMAINED OFF THROUGHOUT FLIGHT 

FACT        19FEB22 15:11  UPON MX ARRIVAL TO A/C THE AVIONICS MASTER 1 PB WAS IN THE OFF POSITION. SUSPECT SWITCH FAILURE FROM TURBULENCE IN SEQ 1 THIS LP. R&R AVIONICS 1 MASTER PB IAW AMM 20-13-04-00-801-A AND 20-13-04-400-801-A. TURNED ON AVIONICS MASTER 1 PB AND ALL RELATED SYSTEMS POWERED ON. PERFORMED OPS CHECKS IAW AMM 34-22-00, 34-62-00, 23-81-00, 34-51-00, 34-53-00, 34-32-00

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