What was found
FLIGHT 3691, RECEIVED "HYD 3 LO PRESS" CAUTION MESSAGE AND GEAR DISAGREE" WARNING MESSAGE AFTER TAKEOFF. NOSE GEAR INDICATED DOWN AND BOTH MAIN GEAR HAD RED DASHES FOR ABOUT 2 MINUTES HYD 3 SYSTEM SHOWS 100 PERCENT AND 3000 PSI. GEAR CAME DOWN NORMALLY. AIR RETURNED. BLED NR 3 HYDRAULIC SYSTEM IAW AMM TASK 29-10-00-810-803, COMPLIED WITH PA 05-018G SCENARIO 1. COMPLIED WITH FUNCTIONAL TEST OF EXTENSION AND RETRACTION SYSTEM IAW AMM 32-30-00-720-801. OPS CHECKED GOOD. APPROVED FOR RETURN TO SERVICE. AIRCRAFT OK FOR SERVICE.