What was found
AIR MANIFOLD 2 FAIL LVL 3 ALERT ON CLIMB OUT. COMPLIED WITH QRH & RETURNED, UNEVENTFUL RETURN. PERFORMED RTS OF AIU'S TO VERIFY NO FAULTY INFORMATION, AIU CHECKS NORMAL, NO FAULTS NOTED. INTERROGATED AIU FOR COMPONENT CFDS FAULTS. PSC 2 SHOWS FAULT 361022 HI STAGE TEMP SENS OPEN CIRCUIT FAULT.