What was found
DURING CLIMB THRU FL250, RT OIL LEVEL LOW STATUS MESSAGE, 15% OIL LEVEL NO ACTION REQUIRED IAW QRH 0-23, OIL PRESSURE 80 PSI AT FL250, 67 PSI AT FL270, 55 PSI AT FL300, 30 PSI AT FL330, FOLLOWED BY RT ENG LOW WARNING, RAN QRH 1-20, RT ENG OIL PRESS. COMPLETED, ENG FAILURE IN-FLT, ENG SHUTDOWN IAW QRH 1-22, LANDED SINGLE ENGINE SAFELY. REMOVED & INSPECTED IDG, FOUND MISSING PACKING ON SPLINE SHAFT. INSTALLED A NEW PACKING ONTO SPLINE SHAFT & MOUNTING PAD. REINSTALLED IAW AMM 24-11-01 OPS & LEAK CHKD GOOD. IAW LMM 72-00-00-280-013, PERFORMED INSP OF ENG, OPS WITH LOW OIL PRESSURE. NO DEFECTS NOTED. SEE AML 4124451-2 FOR CONTINUED MAINT REQUIREMENTS.