What was found
AUTOTHROTTLE KICKED OFF AND WOULD NOT REENGAGE. GROUNDED - YES. RELEASED PER MEL 22-4B AUTOTHROTTLE SYSTEM INOP AND MEL 22-99B CAT III AUTOLAND NOT AUTHORIZED. REF A/T BITE B737-900 FIM 22-31 TASK 801 NO CURRENT FAULTS. LEG 01 SHOWS MESSAGE 22-31688. REF FIM 22-32 TASK 819 A/T SERVO TEST ACCOMPLISHED MULTIPLE TIMES, OPS NORMAL. A/T TORQUE TEST SHOWS NO FAULTS, OPS NORMAL. ACCOMPLISHED DFCS BITE LIBRARY TEST, B737-900 AMM TASK 22-11-00-740-806 (ALL LIBRARY TESTS A+B), FCC INSTALLATION TEST AMM 22-11-33-400-801 SUBTASK 22-11-33-740-801. FCC REPLACEMENT TEST. ALL REQUIRED TESTS PASSED. THIS CLEARS MEL 22-4B, 22-99.