As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CLIMBING THROUGH 16,000 FT AT 265 KTS ECAM L/G DOOR OPEN. SLOWED TO 215 KTS. GEARS RECYCLED AS PER MAINTENANCE REQUEST, NO CHANGE. AMBER DOOR LIGHT INDICATION REMAINS ON UNTIL GEAR SELECTED DOWN. AIRCRAFT RETURNED TO TORONTO. LT MAIN LANDING GEAR DOOR UPLOCK REPLACED AS PER AMM 32-31-33. DOOR OPERATION CHECK CARRIED OUT. NO FAULT FOUND. AIRCRAFT SERVICEABLE.