As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 3600, LANDING GEAR WOULDN'T EXTEND UPON LANDING AND SHORTLY AFTER THE GREEN HI TEMP LIGHT ILLUMINATED AFTER COMPLETING THE QRH. EMERGENCY GEAR EXTENSION AND LANDED. FROM LOG SHEET 1259127 FOUND LANDING GEAR SELECTOR VALVE LEAKING AND FWD TO GEAR. REMOVED AND REPLACED SELECTOR VALVE IAW RJ MM P/N HTE9490-4, S/N ON FRTR008AY, ALL CHECKS ARE GOOD AT THIS TIME.