As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUE TO NR 4 HYD SYSTEM LEVEL LOW PERFORMED ALT GEAR EXTENSION WING OPEN. FLUID LEVEL CAME UP SO GEAR WAS RECYCLED AND RE-EXTENDED NORMALLY WITHOUT FURTHER INCIDENT. HYD FLUID REMAINED AT 4 GAL. FOUND B-NUT ON NR 4 HYD TRANSMITTER LOOSE, REF PER CHAPTER 20 LEAK CHECKED GOOD. SERVICED NR 4 HYD QTY PER AMM 12-12-00 CHECKED GOOD.