As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO YOW, LEFT OIL PRESSSURE GAUGE FLUCTUATED 10 TO 15 PSI OIL TEMP NORMAL ALL OTHER PARAMETERS NORMAL. RETURNED TO DTW. MAINTENANCE PERFORMED T/S FOR GE MM REPLACED LT ENG OIL TRANSMITTER. P/N IPTE119-1000-200D1, S/N 5813-3-844.