As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, TRIED TO RAISE THE LANDING GEAR LEVER, BUT IT DID NOT MOVE. IAW QRH THE CREW PRESSED EMERGENCY RELEASE, LANDING GEAR LEVER STILL DID NOT MOVE. RETURNED TO DEPARTURE AND LANDED SAFELY. MAINTENANCE TROUBLESHOT AND FOUND THE LANDING GEAR LEVER ASSEMBLY DOWN LOCK RELEASE BUTTON WAS INTERMITTENT. REPLACED THE LANDING GEAR LEVER ASSEMBLY WITH REPAIRED UNIT. OPS CHECKED GOOD.