As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT MAIN LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. AN APPROVED INTERIM LINE HAD BEEN INSTALLED AT MIA BECAUSE OF A HYDRAULIC LEAK. REPLACED LINE WITH PERMANENT REPAIR. BLED AND PURGED SYS PER MM TRUCK POSITIONING ACTUATOR REPLACEMENT PROCEDURES. SUSPECT GEAR WOULD NOT RETRACT DUE TO IMPROPER TRUCK TILT POSITIONING.