As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SECOND AIR TURNBACK: CAPT AMBER BAND FLUCTUATES UP AND DOWN INTERMITTENLY THROUGH WHOLE RANGE ON ADI. PERFORMED PSEU BITE PER AMM 32-09-04, FSEU BITE NO FAULT FOUND. REF SERVICE LETTER 767-SL-27-125 REMOVED AND REPLACED LEFT SWC IAW AMM 27-32-01, OPS CHECK OK. ALSO REMOVED LEFT AOA SENSOR P/N 861CAB S/N 1088.