# SDR ASAA2022082639686

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 26, 2022
- Submitted: August 29, 2022
- Operation: Air carrier
- Aircraft: [N428AS](https://openairdocs.org/aircraft/N428AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36353
- Aircraft time: 23,716 hours, 7,438 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Cdu
- Part number: UNKNOWN
- Condition: Failed
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022082639686

## Discrepancy

F/O MCDU SCREEN BLANKED WITH NO OTHER MESSAGES, CAME BACK ON AFTER SOME BIT, TEST AUTOMATICALLY PERFORMED. NO LOSS OF DATA OR LNAV/VNAV @ FL330 80 MILES SE OF AYZOL. GROUNDED - YES. UNIT BITE TEST GOOD. NO HISTORY.

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