As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GUA - CAPTAIN REPORTED LEFT ENGINE OIL FILTER BYPASS LIGHT ILLUMINATED ON CLIMB. LEFT ENGINE SHUTDOWN PER QRH. SINGLE ENGINE TIME 5 MINUTES. EMERGENCY DECLARED RETURNED GUA LANDED WITHOUT INCIDENT. REPLACED CLOGGING TRANSMITTER AND LEFT ENGINE OIL FILTER ELEMENT. SYSTEM GROUND CHECK NORMAL OPERATION.