As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABE FLIGHT 2054 - THE CREW REPORTED A LANDING GEAR LEVER DISAGREE MESSAGE UPON GEAR RETRACTION. THE AIRCRAFT RETURNED TO ABE AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE RIGHT MAIN GEAR UPLOCK BOX. OPERATIONAL CHECKS WERE GOOD.