As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL PRESSURE 1 WARNING AT V1 AND INTERMITTENT PRESSURE DROPS DURING CLIMBOUT. RETURNED TO AIRPORT. VISUALLY INSPECTED LEFT ENGINE AND NO OIL LEAKS EVIDENT. INSPECTED FILTER BY PASS AND CHIP DETECTOR LIGHTS, CHECKS NORMAL. SERVICED ENGINE WITH 2 QUARTS EXXON 2380 TURBINE OIL. PERFORMED GROUND RUN AND ALL PARAMETERS NORMAL.