As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE OIL QTY DROPPED TO ZERO IN FLIGHT. OIL PRESSDECREASING AND OIL TEMP INCREASING. IN FLIGHT SHUT DOWN AND RETURNED TO FIELD. *S/D* ANGLE GEARBOX OIL PRESSURE LINE (LP09) FAILED BEHIND THE FORWARD B-NUT CONNECTION. THE LINE FAILED DUE TO HIGH CYCLE FATIGUE. ALL LP09 LINES ARE BEING INSPECTED FOR PROPER INSTALLATION AND CLAMPING. ALL ENGINES TO BEMODIFIED TO A NEW CLAMPING CONFIGURATION PER PRATT & WHITNEY SPECIAL INSTRUCTION TO BE RELEASED MARCH 2000.