What was found
IN CLB FL310 GOT AMBER IAS DISSAGREE BOTH PFD'S LEFT SIDE CA IAS BAD. F/O + STANDBY INDICATIONS BOTH AGREED, FEW MINUTES INTERMITTENT. CLACKER FOR 3 MIN, ALSO GOT A/T LIM INDICATION IN UPPER DU CTR. ALSO EEC THEN WENT TO ALT EEC. REMOVED & REPLACED AOA SENSOR, IAW B737 AMM 34-21-05. OPERATIONS CHECKS GOOD. ALSO REMOVED & REPLACED LEFT IRU, IAW B737 AMM 34-21-01. OPERATIONS CHECKS GOOD. PRESSURIZED STATIC PORTS AND PITOT PORTS, IAW B737. REMOVED & REPLACED LT PITOT DATA MODULE, IAW AMM34-21-04 AND LT STATIC PORT MODULE. OPERATIONS CHECKS GOOD.