What was found
HAVE HAD SEVERAL OCCURRENCES OF FUEL LEAKS FROM THE JT8D FUEL FLOW TRANSMITTERS. THE LEAKS ARE EVIDENT AT VERY HIGH POWER SETTINGS. A FLEET CAMPAIGN HAS BEEN COMPLETED WHICH CHECKED ALL ENGINES FOR LEAKS AND RECTIFIED DEFECTS. AN EXTENSIVE INVESTIGATION IS BEING CONDUCTED BY OUR MAINTENANCE PROVIDER AND PRELIMINARY RESULTS SHOW THE CAUSE TO BE DEFECTIVE TEFLON BACK-UP RINGS MS9058-20. ALL STOCK OF THE SUSPECT PART HAS BEEN INSPECTED AND ANY DEFECTIVE BACK-UP RINGS FOUND HAVE BEEN QUARANTINED. OUR MAINTENANCE PROVIDER HAS CONTACTED THEIR SUPPLIER OF THE PART WITH THE FINDING. ADDITIONALLY THEY ARE CHECKING FOR OTHER APPLICATIONS FOR THE PART WITHIN THEIR VARIOUS FLEETS. A FULL REPORT WILL BE ISSUED AND I WI