What was found
AUTOPILOT A DISCONNECTED TWICE IN LEVEL FLIGHT WITH TEMPORARY LOSS OF LNSV + VNAV. GROUNDED - YES. FAULT REVIEW ON ADIRU L, SMYD 1, AND DFCS CH. A RESULTED IN THE FOLLOWING FAULTS: 22-11397, 22-11739, 22-11032, 22-11378, 22-11017, 22-11754, 22-11021, 34-21007, 34-21023, 27-31015, AND 27-31012. ALL FAULTS RELATED TO A FAULTY LH/#1 ADIRU. REPLACED THE LH/#1 ADIRU REF B737-900 AMM 34-21-010/401. ALL TESTS NORMAL. ALSO ACCOMPLISHED A DFCS LAND VERIFY REF AMM 22-11-00/201. ALL TESTS NORMAL.