As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PMA REPLACEMENT FUEL CELL IS CAUSING FUEL TO TURN GREEN. FUEL WAS SENT OUT TO A LAB TO BE TESTED AND TESTS WERE INCONCLUSIVE AS TO THE SUBSTANCE BUT IT IS SUSPECTED TO BE A DYE. THE MANUFACTURE WAS CONTACTED AND DENIES PUTTING ANY DYE IN THE TANK DURING THEIR PRODUCTION OR QA PROCESS. THE ORIGIN OF THE SUSPECTED DYE IS UNKNOWN.