What was found
AUTOPILOT A DISENGAGED IMMEDIATELY AFTER SELECTION 4 TIMES DURING FLIGHT, AUTOPILOT B OPERATION WAS NORMAL. GROUNDED - YES. (RESOLVED ON W/O: 1882673 TASKCARD: N/R-00001 ) REMOVED AND REPLACED AILERON ACTUATOR FOR CHANNEL "A" AUTOPILOT IAW B737-900 AMM 22-11-25-000/400-801. PERFORMED AILERON ADJUSTMENT IAW AMM 22-11-25-820-801. ALL AUTOPILOT AILERON RIGGING WITHIN LIMITS. PERFOREMD DFCS LIBRARY 31 IAW AMM 22-11-25-710-801. ALL TESTS PASS. THIS CLEARS MEL 22-1F FOR CHANNEL A AND MEL 22-99B. PLACARDS REMOVED. NO A/C CONFIG CHANGES. 15 CB PULLED, COLLARED, AND RESET PER AMM. SEAMC SCOTT NOTIFIED.