As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 5369 - VERY STRONG VIBRATION NOTICED AFTER GEAR RETRACTION, MAX SPEED 160KIAS. RETURNED TO MIA. PERFORMED NOSE LANDING GEAR FORWARD DOOR PRELOAD CHECK AND GEAR EXTENSION AND RETRACTION IAW AMM. FOUND DOORS FLUSH AND IN CONTACT WITH STOPS. OPS CHECK GOOD. (M)