As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE AIR FAULT LIGHT CAME ON AFTER TAKEOFF. AIR RETURN TO MEM. MAINTENANCE REPLACED ISOLATION / PRESSURE REDUCING VALVE FOR NR 2 ENG IAW AVRO AMM 36-11-11. OPS AND LEAK CHECK GOOD. P/N ON 2985A000-003, P/N OFF 2985A000-002, S/N ON 923048-3, S/N OFF 760291-5.