Learjet 31
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 40; Flight Crew Total 3400; Flight Crew Type 300
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
After receiving clearance we departed. The route description is to climb on a heading of 210 to cross ZZZZZ at or below 1750 ft. At approximately 1500 ft I engaged the NAV function and autopilot. The plane immediately started a turn to the left away from the course in the FMS. I disengaged the auto pilot and began a turn to the right on course when ATC queried me and then gave me vectors. At approximately 3000 ft the cockpit and cabin began to get hot and fill with smoke. We [advised ATC] and landed on Runway XX.It is not clear at this time if there was a malfunction of the autopilot due to the cause of the smoke. We expedited what we thought was the appropriate action to stay on course without causing an air incident while dealing with the [smoke and heat].
Reporter stated that post flight maintenance inspection revealed a stuck bleed valve on one of the engines pumped bleed air into the aircraft which caused the heat and smoke.
[Report narrative contained no additional information.]
Lear 31 flight crew reported smoke and heat in the cockpit. The crew returned to the departure airport.