As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND CRACKED HYDRAULIC TEE FITTING, PN MS21911D6, IN AUXILLIARY HYDRAULIC SYSTEM FILTER RETURN LINE. CRACK WAS FOUND AT THE MALE END WHERE END AND TEE BODY COME TOGETHER. REPLACED FITTING AND PRESSURIZED AND LEAK CHECKED SYSTEM. OP'S CHECK WAS GOOD, NO LEAKS NOTED.