As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OBBI - DF8 - PRECAUTIONARY SHUTDOWN OF NR 4 ENGINE DUE TO LOW OIL PRESS READING BELOW 36 PSI (QTY AND TEMP OK). REMOVED AND REPLACED NR 4 ENGINE OIL PRESS X-MITTER PER MM CHAPTER 79. PERFORMED NR 4 ENGINE RUN PER EWWA ENGINE RUNUP MANUAL, NR 4 ENGINE OIL PRESS, OPS CHECKED NORMAL ON GROUND RUN. (M)