As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
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.