As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) AT CRUISE THE NR 1 FUEL BYPASS LIGHT ILLUMINATED. DURING POST INVESTIGATION BOTH HP/LP FUEL FILTERS WERE INSPECTED AND REPLACED - FILTERS INDICATED SOME SLIGHT SIGNS OF FUNGUS. DURING NEXTFLIGHT THE SAME PROBLEM RE-OCCURRED. BOTH FILTERS WERE CHANGE DONCE AGAIN - AIRCRAFT SERVICEABLE.