What was found
EN ROUTE TO SCL SHUT DOWN LEFT HAND ENGINE DUE TO OIL PRESSURE FLUCTUATIONS. DIVERTED TO GYE. *S/D* ANGLE GEARBOX OIL PRESSURE TUBE (LP09) FAILED BEHIND THE FORWARD B-NUT. REPLACED THE OIL LINE AND SUPPORTIING CLAMPS. ENGINE WAS REPLACED AFTER FERRY FLIGHT ,TO TEST FOR POTENTIAL HIGH VIBRATION IN THE ANGLE GEARBOX. PRATT WHITNEY WILL RELEASE SERVICE BULLETIN THIS YEAR TO ADD SUPPORT BRACKETS AND CLAMPS. TEST CELL RESULTS PENDING. NO INDICATION OF EXCESSIVE OR UNUSUAL GEARBOX VIBRATION.