As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING LAND VERIFY AND FMS TC 78222000 - FOUND LEFT AILERON POSITION SENSOR A FAULTY. GROUNDED - YES. PERFORMED AILERON POSITION SENSOR ADJUSTMENT PER B737-900 AMM 22-11-29-820-801, ADJUSTMENT CK'S GOOD. PERFORMED AILERON POSITION SENSOR TEST PER AMM 22-11-29-710-801. PERFORMED DFCS LAND VERIFY TEST(BITE GRP#49) PER AMM 22-11-00, TETS PASSED.