As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING SCHEDULED INSPECTION, ENGINE FUEL FILTER PRE BLOCKAGE SWITCH BENCH TESTED AND FOUND TO BE STUCK IN THE OPEN POSITION. NO WARNING TO FLIGHT CREW OF FUEL FILTER BLOCKAGE. DURING THE BENCH CHECK OF THE SWITCH WITH PSI APPLIED TECHNICIAN TAPPED SWITCH AND FUNCTION RETURNED TO NORMAL. SWITCH REMOVED FROM SERVICE AND REPLACED WITH NEW UNIT.