# SDR ASAA2021103136471

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2021
- Submitted: November 2, 2021
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 30,904 hours, 9,926 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Display
- Part number: 1741010303
- Part serial: 002167
- Condition: Failed
- Location: Flight Compartme
- Part time: 30,898 hours, 9,924 cycles
- Stage of operation: CR
- 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/ASAA2021103136471

## Discrepancy

CAPTAINS MCDU FAILED IN FLIGHT. GROUNDED - YES. REL PER MEL 34-36L CAPTS MCDU INOP AUTH BY SEAMC SMITH @ 2115Z. REPLACED CA'S MCDU PER 34-61-01. OP CHK GOOD. VERIFIED CORRECT SOFTWARE P/N AND CONFIG PER B737-900 AIPC 34-61-01-03 SHEET 04. 2 EA CBS PULLED AND RESET. ETOPS GROUND SYS CHK GOOD. THIS CLEARS MEL 34-36L. SEAMC MARK NOTIFIED.

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