# SDR ASAA2013102996254

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 29, 2013
- Submitted: October 31, 2013
- Operation: Air carrier
- Aircraft: [N593AS](https://openairdocs.org/aircraft/N593AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35107
- Aircraft time: 21,679 hours, 6,765 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Cdu
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CL
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013102996254

## Discrepancy

DURING CLIMBOUT,  FMC/CDU WENT BLANK FOR ABOUT 5 SECONDS, THEN IT ENTERED A BIT-TEST DISPLAY MODE WITH ASSOCIATED ILLUMINATION OF THE CALL FAIL EXEC LIGHTS.  IT RESUMED NORMAL OPS WITHOUT ANYPILOT INPUTS,  ACFT GROUNDED. CAPTAINS FMC/CDU OPS NORMAL. NO HISTORY 30 DAYS.  REF MM 34-61-00.  GROUND VERIFICATION GOOD.

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