As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HORIZON HELICOPTERS HAD NOTICED FUEL CONTAMINATION AFTER A BOOST PUMP FAILURE ON 4 OCCASIONS. THE FILTER IS FULL OF BLACK CARBON. SUBMITTER BELIEVES THE BOOST PUMP INTERNAL BREAKDOWN IS THE SOURCE OF CONTAMINATION AND HAS SAMPLE PUMP AND FILTER AT FACILITY FROM THIS AIRCRAFT.