What was found
LO OIL PRESS LIGHT R ANNUNCIATOR ILLUMINATED AND OIL PRESSURE TAPE SHOWING 0 IN FLIGHT. REMOVED & INSPECTED R ENG. OIL FILTER & REINSTALLED IAW PW 545 AMM: 79-20-01. REMOVED R. ENG COLD START VALVE, CLEANED, MADE A 1/8 ADJUSTMENT IN THE CCW DIRECTION AND REINSTALLED. PERFORMED SATISFACTORY ENGINE RUNS IAW PW 545 AMM: 71-00-00 CHPT. 13 & 17. NO DEFECTS NOTED... WE DECIDED TO KEEP ACFT DOWN FOR FURTHER TROUBLESHOOTING, ACFT STILL DOWN AT THIS TIME. WE R&R COLD START VALVE, AWAIT OPS CKS AND ENG RUNS. WE WILL PERFORM MX CHECK FLIGHT FOLLOWING ESTIMATED RTS OF 2/27.