As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PASSENGER LOADING (ENGINES SECURED) AFT CROSSTUBE FAILED ONE INCH OUTBOARD OF RIGHT HAND ATTACHMENT POINT (STRESS MARKS ON TUBE INDICATES FAILURE STARTED AT THE 12 O`CLOCK POSITION). AIRCRAFT SETTLED TO THE RIGHT RESULTING IN DAMAGE TO RIGHT HAND AFT FLOAT BOARD ASSEMBLY AND TO THE RIGHT HAND SKID TUBE IN THE AREA OF THE FWD SADDLE. REPLACED AFT CROSSTUBE AND RT SKID TUBE.