What was found
IN COMPLIANCE OF A FLEET CAMPAIGN DIRECTIVE DURING AN ENGINE INSPECTION, A MECHANIC CHECKING THE VENT LINE OF THE OVERBOARD ENGINE BREATHER, FOUND THE RUBBER SECTION SWOLLEN INTERNALLY. LEFT UNCHECKED TO THE POINT OF OBSTRUCTION, IT WOULD CAUSE THE ENGINE OF THIS ACFT TO START CONSUMING LARGE AMOUNTS OF ENGINE OIL AND COMPROMISE THE ENGINE BEARING SEALS RESULTING IN EXPENSIVE ENGINE REPAIRS. THE FLEET CAMPAIGN DIRECTIVE MENTIONED ABOVE WAS GENERATED BY THIS ACFT OPERATOR TO ADDRESS THE CONDITION OF THESE AGING HOSE SECTIONS.