As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK DUE TO LEVEL 1, SEL LSAS ROB OFF, PASSING F320 DURING DEPARTURE. BOTH AUTOPILOTS WOULD NOT ENGAGE. FOUND BOTH RAM AND MOD LVDT AT UPPER LIMITS OF OHM READING FOR ROB ELEVATOR ACTUATOR . OHMED AND MEGGED WIRING TO GROUND WITH NO FAULTS FOUND. REF. FIM. 22-11. REMOVED AND REPLACED RH OUTBOARD ELEVATOR ACTUATOR UP TO AND INCLUDING 3G STEP 9 OF AMM 27-33-30-4, LEAK CHECK GOOD.