As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CLIMB AT FL290, AUTOPILOT DISENGAGED. NO MODES WOULD RE ENGAGE ACCOMPLISHED MCDP FCC TEST, TEST 30 & TEST 40. ALL TEST PASS. MCDP FLT FAULT WITH ADIRU LT. REPLACED THE LT AIR DATA INERTIAL REFERENCE UNIT (ADIRU) IAW AMM 34-26-01/401. PERFORMED MCDP TEST 30 IAW AMM 22-00-02-201. GROUND RECERTIFICATION TEST PASSED.