As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE LOW OIL PRESSURE LIGHT WOULD INTERMITTENTLY ILLUMINATE BUT OIL PRESSURE INDICATION INDICATED IN THE GREEN. FOUND PRESSURE SWITCH P/N 680S53 "A" WIRE INSIDE PRESSURE SWITCH CHAFED AND GROUNDING ON SWITCH CASE. REPLACED PRESSURE SWITCH. OPERATIONAL CHECKED GOOD.