As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TOA - FL 1250 - AFTER TAKEOFF FROM PIT, THE LEFT GEAR RED LIGHT REMAINED ON AFTER GEAR RETRACTION. CREW CYCLED GEAR AND ALL LIGHTS WENT OUT. MAINTENANCE FOUND THE FORWARD LEFT GEAR DOOR SWITCH LOOSE. SWITCH WAS SECURED AND OPS CHECKED (GEAR SWING). CHECKED GOOD. (M)