As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST SYSTEM "A" QUANTITY & PRESSURE DURING CRUISE. FOUND IN/OUT LINES TO SYSTEM A HYD PUMP CASE DRAIN FILTER LEAKING . RETORQUED LINES REF B737 AMM 20-50 PERFORMED ENG. RUN / SYSTEM RUN LEAK TEST, NO LEAKS NOTED. RESERVICED RESEVOIRS TO FUL REF AMM 12-12.