As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN LANDING GEAR LEVER SELECTED UP, THE RT MAIN GEAR DID NOT RETRACT. WE HAD RED UNLK AND THE GREEN ARROW ON BOTH UPPER AND LOWER PANELS. R & R LG SELECTOR CONTROL VALVE. OPS AND LEAK CHECK GOOD IAW ATR JIC VAR32-31-51 RAI 10000 002 AND PERFORMED SEVERAL EXT AND RETRACTION OPS CKS IAW ATR JIC 32-31-00 OPT 10000 OPS CHECK WAS GOOD EACH TIME.