As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MASTER WARNING LIGHT ILLUMINATED DURING T/O (AT APPROX 80-90 KIAS), THE RT OIL PRESSURE LIGHT ILLUMINATED AND EXTINGUISHED WHEN POWER WAS REDUCED TO IDLE. RAN ACFT, COULD NOT DUPLICATE PROBLEM. REMOVED RT OIL PRESSURE SWITCH P/N 9912178-3 S/N 1291. INSTALLED NEW SWITCH P/N 9912178-3 S/N 1382. RAN ACFT OPS AND LEAK CHECK GOOD, ALL IAW CE-560 MM 79-31-01.