As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER GEAR RETRACTION ON T/O LEFT MAIN GEAR RED LIGHT REMAINED ON. POM ABNORMAL PROCEDURES FOLLOWED UNTIL GEAR DOWN WITH 3 GREEN LIGHTS. GEAR WAS LEFT DOWN AND RETURNED TO ATL. FOUND LT GEAR RETRACT ACTUATOR LEAKING. REMOVED AND REPLACED SAME. OP CHECKS GOOD.