What was found
DURING DEPARTURE FROM KTPA, THE FLT CREW EXPERIENCED A FLT CONTROL MALFUNCTION INVOLVING ELEVATOR SYS. FOLLOWING A RT ELEV HYD OFF CAS MESSAGE, ELEV BECAME LOCKED, REQUIRING DUAL-PILOT INPUT TO MAINTAIN AIRSPEED. CONTROL PARTIALLY RESTORED AT 12, 000 FT AFTER A CIRCUIT BREAKER RESET. ACFT RETURNED TO KTPA & LANDED SAFELY WITHOUT ELECT PITCH TRIM. TECHS PERFORMED TROUBLESHOOTING IAW GULSTM TECH. OPS RECOMMEND. TROUBLESHOOTING PERFORMED IAW AMM 27-30-00 & AMM 27-34-03. ACFT FLOWN MULTIPLE LEGS SINCE EVENT & NO FURTHER ISSUES WERE REPORTED. CURRENTLY WORKING WITH GULSTM TECH OPS & FAST TEAM, CAN PROVIDE IN DEPTH & DETAILED ANALYSIS AFTER REVIEWING ALL FLT DATA AND SYSTEM OPS TO DETERMINE ROOT CAUSE OF OCCURRENCE.