What was found
THERE IS A NR 4 'AN' LOW PRESSURE HOSE ASSEMBLY WITH FIRE SLEEVE INSTALLED THAT RUNS FROM THE NR 4 90-DEGREE FITTING ON THE DIFFERENTIAL PRESSURE CONTROLLER TO THE OIL SUMP/INDUCTION HOUSING ASSEMBLY. THE END THAT ATTACHES TO THE CONTROLLER IS IN CLOSE PROXIMITY TO THE TURBOCHARGER WASTEGATE VALVE CAUSING HOSE TO BECOME VERY HARD AND BRITTLE. SUBMITTER SUGGESTS THIS HOSE BE CHECKED CLOSELY EVERY ANNUAL AND ROUTINELY REPLACED EVERY 3 YEARS.