As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, AFTER GEAR EXTENSION, LOUD NOISE FROM NOSE AREA WAS HEARD AND LOST NR 2 HYD QTY FOLLOWED BY ISO VALVE CAUTION LIGHT. ABOUT .5 QT REMAINS. R & R MANIFOLD IAW MM 32-50-16. OPS & LK CK GOOD SWUNG NLG SEVERAL TIMES W/O ANY ANOMOLIES.