# SDR ASAA2022102340445

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 2022
- Submitted: October 25, 2022
- Operation: Air carrier
- Aircraft: [N532AS](https://openairdocs.org/aircraft/N532AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36346
- Aircraft time: 44,598 hours, 13,163 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Cdu
- Part number: UNKNOWN
- Condition: Intermittent
- Location: Unknown
- Stage of operation: CR
- 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/ASAA2022102340445

## Discrepancy

CAPTAIN'S MCDU FAILED AT 1:45 INTO THE FLIGHT, SCREEN WENT DARK, ALL LIGHTS ON MCDU ILLUMINATED. NO OTHER INDICATIONS. AFTER APPROX 20 SECONDS MESSAGE "BIT PASS" DISPLAYED THEN FULL FUNCTION RETURNED. GROUNDED - YES. REBOOTED CAPT MCDU & NORM OPS RESTORED & BITE CK OK REF B737-800 AMM 34-61-804.

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