# SDR CALA2014050991000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 6, 2014
- Submitted: May 9, 2014
- Operation: Air carrier
- Aircraft: [N121UA](https://openairdocs.org/aircraft/N121UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29167
- Aircraft time: 62,315 hours, 7,194 cycles
- Engine: Pwa PW4056
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Display
- Condition: Faulty
- Location: Cockpit
- Stage of operation: IN
- 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/CALA2014050991000

## Discrepancy

FIRST OFFICER`S PFD BLANKED OUT TWICE WITH EICAS, IDS & DU STATUS MSG.  REPLACED FIRST OFFICER`S PFD IAW MM 31- 61-02, TEST & OPERATIONS OK.

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