As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF & THE GEAR SELECTED UP, THE CREW REPORTED A GEAR DISAGREE WARNING MSG. THE CREW PERFORMED A MANUAL GEAR EXTENSION IAW THE EMER CHECKLIST & RETURNED FOR A NORMAL LANDING. REPLACED THE LT UPLOCK ASSEMBLY IAW AMM 32-32-05. ACFT RETURNED TO SERVICE. UPLOCK ASSEMBLY PN 17051-101, SN DH-0266-04, AC CYCLES 20519 & AC HOURS 25887.