As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, LOST YELLOW HYD QUANTITY ATB. FOUND O-RING ON YELLOW SYSTEM HP MANIFOLD BLOWN OUT FROM FITTING. REMOVED AND REPLACED ORING. OPS TEST OF YELLOW HYD SYSTEM PER AMM 29-13-00-00-710-801-A. NO LEAKS NOTED OPS CHECK OK. SVC HYD SYSTEM. OK FOR SERVICE