# SDR BKEA2014122801

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2014
- Submitted: December 30, 2014
- Operation: Air carrier
- Aircraft: [N67WG](https://openairdocs.org/aircraft/N67WG), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 0053
- Aircraft time: 1,728 hours, 1,114 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BKEA2014122801

## Discrepancy

AT FL 420, ON PDF 1 ALTITUDE FAIL RED X WAS NOTED, FOLLOWED BY THE WHOLE PDF RED X INDICATION.  SHORTLY THEREAFTER, THE CREW NOTED AHRS 1 FAIL, FOLLOWED BY THE ASSOCIATED AUTOPILOT & YAW DAMP FAIL INDICATIONS.  RETURNED WHERE MX SWAPPED THE PDF 1 WITH THE MFD & CONDUCTED A CMC DOWNLOAD.  NO FAULT CODES WERE NOTED & SYSTEMS WERE OPERATING NORMALLY.  ACFT WAS RETURNED TO SERVICE & HAS MADE 2 FLIGHTS WITH NO FAIL CODES.

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