As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLIGHT INBOUND & HAD A YELLOW HYD QTY INDICATION. DECLARED PAN PAN WITH ATC. FOUND HYD LEAK FROM BOTTOM LT FITTING OF PTU MANIFOLD. FITTING O-RING FOUND DAMAGED. O RING REPLACED IAW CMM TASK 29-13-15-400-003-A01. LEAK CHECK CARRIED OUT, NO LEAKS FOUND. YELLOW HYD RESERVOIR FILLED IAW AMM 12-12-29-611-001-A.