What was found
LEFT MAIN LANDING GEAR UNSAFE LIGHT REMAINED ON AFTER GEAR RETRACTION. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAITNENANCE REPLACED LEFT MAIN GEAR DOOR UPLATCH ASSEMBLY, OPERATIONAL CHECK NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT MAIN LANDING GEAR UNSAFE LIGHT REMAINED ON AFTER GEAR RETRACTION. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAITNENANCE REPLACED LEFT MAIN GEAR DOOR UPLATCH ASSEMBLY, OPERATIONAL CHECK NORMAL.