As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON TAKEOFF WHEN 90 PERCENT TORQUE APPLIED, THE NR 1 OIL PRESSURE WARNING LIGHT CAME ON. OIL PRESSURE INDICATOR SHOWED DROPPING OIL PRESSURE. AS SOON AS ENGINE WAS PUT IN DISCING OIL, PRESSURE RETURNED TO NORMAL. SHAFT SEAL FOUND LEAKING OIL.