As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED THAT THE LANDING GEAR DOES NOT RETRACT WHEN GEAR LEVER MOVED TO UP POSITION RESULTING IN AN AIR TURN BACK. MAINTENANCE CARRIED OUT FIM TASK 32-30-815 AND FOUND THE ALTERNATE EXTEND ACCESS DOOR SWITCH INTERMITTANT, SWITCH P/N PN MS25011-4 WAS REPLACED. GEAR SWING CARRIED OUT IAW MM 07-11-01. CHECKED SERVICEABLE.