As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR SPLIT MESSAGE ON EOAP FOR LOSS OF LEFT ENG GENERATOR. TROUBLESHOT PER MD-90 TSM 27-30 PAGE 5. DUE TO LEFT GENERATOR POWER FAULT SUSPECT ACS SYSTEM LOST LEFT ELEVATOR POSITION INDICATION CAUSING FAULT. CLEARED ELEVATOR SPLIT MESSAGE THROUGH MCDU. MESSAGE DID NOT COME BACK. REPLACED ACU PER AMM. ACS R-T-S PASSED. ELEVATORS FAIRED NORMALLY AND THERE IS NO ELEVATOR POSITION SENSOR SPLIT INDICATION THROUGH MCD SENSOR VALUES.