PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor
Flight Crew Last 90 Days 150; Flight Crew Total 16000; Flight Crew Type 500
Situational Awareness
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Landed As Precaution; Flight Crew Overcame Equipment Problem; Flight Crew Landed in Emergency Condition; General Flight Cancelled / Delayed
Aircraft
We had just completed 3 touch and goes on Runway 27 at LAL. On final approach to Runway 27 at LAL the passenger; a commercially rated pilot; noticed smoke. A few seconds later I noticed the smoke coming into the cabin from the air vents. We informed Lakeland tower we had smoke in the cockpit and would be evacuating the aircraft after landing. Since the smoke subsided after landing we taxied off the runway and shut down the aircraft.During post flight inspection we notice oil dripping from the left side of the engine compartment. When we opened the cowling we discovered the oil line was disconnected from the left cylinder closest to the firewall. This was determined to be the source of the smoke.Other than the detached oil line there was no damage to the aircraft. We towed the aircraft to the hangar and had the oil return line reattached.
PA28 Pilot reported smoke in the cockpit and found a disconnected oil line during post flight inspection.