As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INCIDENT DETAILS: AFTER TAKEOFF UNABLE TO RETRACT LANDING GEAR. RETURNED. PAN PAN DECLARED WITH ATC. RESOLUTION FIM 32-61-00-810-890-A C/OUT AND FOUND NLG WOW SENSOR 1 & 2 CLEARANCE AT 0.060" AND 0.090", BOTH SENSORS ADJUSTED IAW AMM 62-61-00 TO 0.044" AND 0.040". LANDING GEAR RETRACTION C/OUT SERVICEABLE.