PA-31T Cheyenne I
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 50; Flight Crew Total 5000; Flight Crew Type 500
Aircraft Equipment Problem Less Severe
Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Landed in Emergency Condition; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification
Aircraft
1. Sudden lurch; ID'd problem engine (left)2. Checked power; left engine remained stable at 25' mp3. Contacted Center (problem occurred just as Tower switched me to Center); advised them of engine trouble. I did not declare an emergency; as the engine was stable; and the oil pressure was in the green.4. Worked on adjusting right engine to maintain altitude. 5. Continued to correct heading while navigating to VFR conditions; read gauges; troubleshoot. Referred to checklists and company procedures.6. Noticed considerable oil running down the wing; immediately [coordinated with] Center; and diverted to ZZZ.7. Landed without incident.
PA31 pilot reported an engine malfunction in cruise resulted in a diversion.