Here is the saga of the AA flights to Miami.
On Saturday the planes from Miami to beef island were delayed about three
hours because a cargo plane blew a tire on the runway at beef island

On Sunday they had to change the direction of takeoff on beef island because
of the wind so the bottom line is they had 380 foot less of runway so the
plane was weight restricted they had to take off with no baggage to Miami

On Monday the plane took off and went to San Juan probably to pick up fuel
again probably because it was weight restricted so they elected to take off
with very little fuel go to San Juan ,so they were in an hour and a half
late coming into Miami
American is not having a good week with their flights from Miami to BVI
andreturn