# SDR 4DPA202505290001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 26, 2025
- Submitted: May 29, 2025
- Operation: Air carrier
- Aircraft: [N947JX](https://openairdocs.org/aircraft/N947JX), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145610
- Aircraft time: 41,788 hours, 32,847 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Message
- Condition: Multiple Fail
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/4DPA202505290001

## Discrepancy

CREW REPORTED- WHILE AT FL360 EN-ROUTE TO LAS, AUTOPILOT FAILED FOLLOWED BY MULTIPLE SYSTEM FAILURES EMBLEMATIC OF A DC BUS1 FAILURE EVEN THOUGH DC BUS 1 FAIL DID NOT APPEAR ON THE EICAS. SYSTEMS INCLUDED TRIM, PRESSURIZATION , HYDRAULICS, FLAPS, SPOILERS, ETC. ALSO INCLUDED ANTI-ICE, SPS, LG AIR/GND FAIL. CORR ACTION MX TROUBLESHOOTING WITH EMB MFR SME'S AS THIS IS A REPEAT ISSUE. AIRCRAFT STILL AOG UNTIL ISSUE FOUND.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.