As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT MLG DID NOT RETREAT AFTER TAKEOFF GEAR DISAGREE MSG C/W QRH RETURN TO LGA AT WS 39800 LBS. FOUND LT UPLOCK TARGET LOOSE AND OUT OF ADJUSTMENT. ADJUSTED TARGET FOR LT MLG UPLOCK. REF AMM 32-32-05. OPS TEST OF LANDING GEAR EXTENTION AND RETRACTION SYSTEM NORMAL. REMOVED FROM MEL.