As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENG LOW OIL PRESS LIGHT ILLUMINATED & LOW OIL PRESS GAUGE AT ZERO. LT ENG WAS SHUTDOWN, SINGLE ENG TIME 15 MINUTES. EMER DECLARED FLIGHT RETURNED, LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. REPLACED LT ENG. SYS GND CHECKED NORMAL OPERATION OPEN.