As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH FL340 NOTICED THE #1 ENG OIL PRESS READ 0 PSI. FOUND PD006 CONNECTOR ON LH ENGINE OIL TRANSDUCER DISCONNECTED. RECONNECTED CONNECTOR AND SECURELY LOCK WIRED. ENGINE OIL PRESSURE INDICATION WAS PRESENT AND NOMINAL DURING ENGINE RUNS