As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, NR 2 HYD PUMP CAUTION LIGHT ILLUMINATED WITH ZERO QTY. ENGINE OPERATED APPROX 30 MINUTES DURING RETURN TO FIELD. NO HYD PUMP HOT LIGHT ILLUMINATED. R & R FORWARD FITTING O-RING AT PRESSURE MANIFOLD. INSPECTED DELT- P FOR BYPASS. NONE FOUND. SERVICED HYD SYS AND OPS CHECKED GOOD. R & R NR 2 HYD PUMP ASSY IAW WORK CARD 29-00-00 AND COMPLIED WITH WORK CARD 29-12-02 TO SATISFY REQUIRED AMM 05-50-33.