What was found
UPON DEPARTURE, UPON GEAR RETRACTION, OBSERVED A LOUD SINGLE (THUD), FOLLOWED BY A HIGH PRESSURE (HISSING) SOUND, THEN A STRONG ODOR OF HYDRAULIC FLUID. WITHIN 2-5 SECONDS, MASTER CAUTION ILLUMINATED ALONG WITH THE FOLLOWING CAS MESSAGES: AMBER - HYD PTU. REMOVED FAULTY NLG STEERING ACTUATOR HOSES. BLED HYD SYSTEM. NG STEERING OPS CHECK GOOD. WORK DONE I/A/W C750 MM 12-10-03. LEAK CHECK GOOD.