# SDR AALA201905159011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 2019
- Submitted: May 15, 2019
- Operation: Air carrier
- Aircraft: [N355PU](https://openairdocs.org/aircraft/N355PU), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31277
- Aircraft time: 4,846 hours, 2,017 cycles
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Deu
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201905159011

## Discrepancy

AIRCRAFT NOT GROUNDED: PILOT REPORTS DURING DESCENT IN VNAV PATH, DESCENDING THROUGH FL 340 DISPLAY SOURCE ON PFD APPEARED. DISPLAY  SOURCE DISAPPEARED AND RETURNED 3 MORE TIMES DURING DESCENT. MAINTENANCE ACCOMPLISHED BITE TEST OF BOTH CDS SYSTEMS- FOUND DEU 1 SOFTWARE RESET FAULT MAINT MSG 31-60041. ACCOMPLISHED DEU 1 SELF TEST IAW FIM 31-62-00-810-809 AND IAW 31-62-00-810-802 TEST OK.

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