As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD INFLIGHT T538/21JAN - RIGHT HYDRAULIC QUANTITY INDICATION ILLUMINATED SHOWING DECREASE IN FLIGHT. LANDED ORD WITHOUT INCIDENT. FOUND HYDRAULIC DRAIN ON NR 2 ENGINE CRACKED. REPLACED HYDRAULIC DRAIN ON NUMBER TWO ENGINE. SYSTEM GROUND CHECKED NORMAL OPERATION.