As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THREE MINUTE INTO CLIMB NR 4 ENGINE LOWER OIL PRESSURE LIGHT ILLUMINATED. RETARDED TO 55 PERCENT N1 BEFORE LT WOULD EXTINGUISH. CHANGED OIL FILTER AND CHECKED OIL BYPASS SWITCH AND LOW OIL PRESS SWITCH. RESERVICED ENGINE ENGINE, RUN CHECKS OK PER 71-00-00 TEST 309. (M)