As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN GEAR WAS SELECTED DOWN ON APPROACH GEAR DISAGREE WARNING POSTED NOSE GEAR WAS DOWN BOTH LT & RT MAINS REMAINED IN THE UP POSITION. COMPLETED QRH ATTEMPTED TO CYCLE GEAR WITH 2B ON BOTH MAINS, REMAINED UP PULLED ALTERNATE EXTENSION PER CHECKLIST & LOCKED. R & R MLG SELECTOR VLV IAW AMM 32-32-10, OPERATIONS CHECKED GOOD & LEAK CHECKED GOOD OK FOR SERVICE.