As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIAMI - AFTER TAKEOFF, NOTED FUEL LOSS FROM NR 1 ALT FUEL TANK. RETURNED TO MIAMI. LANDED WITHOUT INCIDENT. INSPECTION REVEALED LEAKING FUEL TANK CAP AT NR 1 ALT TANK. REPLACED FUEL TANK CAP. AIRCRAFT RETURNED TO SERVICE. TOTAL CYCLES 20,256.