As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
'NR 3 HYDRAULIC SYSTEM HAS A LOUD NOISE WHEN PUMPS TURNED ON.' FOUND PRE-CHARGE ON ACCUMULATOR LOW. JACKED AIRCRAFT AND REPLACED ACCUMULATOR. REPLACED ACCUMULATOR AND SERVICED SYSTEM WITH FLUID. RETRACTED GEAR 5 CYCLES PER MM TO BLEED SYSTEM. SERVICED SYSTEM WITH FLUID, LOWERED AIRCRAFT, REMOVED JACKS. SYSTEM OPERATED NORMALLY AND LEAK CHECK GOOD.