What was found
AFTER TAKEOFF, COULD NOT RAISE SYS 2 GEAR HANDLE, USED SYS 1. LOST F/O PITOT HEAT & TAT PROBES. LOST PITCH TRIM NR 2 & NR 2 CABIN PRESSURE REGULATOR. WOULD NOT RESET IN AIR & ALL SYSTEMS RETURNED TO NORMAL ON LANDING. PSU SHOWS FAULT 14, RT MLG SYS 2 PROXIMITY DETECTOR 62GB FAULTED IAW AMM 32-00-00-04. FOUND SENSOR 62GB CONNECTOR LOOSE AFTER REMOVING HEAT SHRINK. CLEANED CONNECTOR & REPLACED HEAT SHRINK. REPLACED PROXIMITY BOX IAW MM 32-31-71-04-0 & OPS CHECKED OK. OPS CHECKED PITOT HEAT & TAT OK IAW MM 30-31-00-05-0, PITCH TRIM OK IWA MM 22-27-00-05, CABIN PRESSURE OK IAW MM 21-31-00-05-0.