Date: 202102
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Flight conditions: VMC
Weather elements / visibility: 25
Light: Daylight
Aircraft: Cessna Citation Sovereign (C680)
Operator: Corporate
Operating under: Part 91
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
Airspace: Class C ZZZ
ATC / advisory: Tower ZZZ
Reporter organization: Corporate
Reporter function: Pilot Not Flying; First Officer
Reporter qualification: Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP)
Human factors: Time Pressure; Workload
Second reporter function: Captain
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Detector: Person Flight Crew
When detected: In-flight
Result: Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Departure Airport; General Evacuated; General Flight Cancelled / Delayed; General Maintenance Action
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: After takeoff at ZZZ RW XXL; and at approximately 500 feet AGL; a slight haze was noticed in the cockpit by the flight crew. A few seconds later; the passengers also noticed this in cabin area of airplane. It was then we observed a slight pungent order typical of smoke. At this time we observed a 'baggage fire' alert on the crew alert system. Operating as a crew; we [advised ATC] at this time and made a downwind turn in the airport pattern for runway XXL. With the appropriate checklist for the indicated condition complete; we were cleared to land on runway XXL. The smoke that was observed previously had now dissipated we and turned base to final and made normal landing on runway XXL. After exiting runway XXL at intersection X; we shutdown the aircraft and executed an emergency evacuation using the appropriate checklist. Upon observation after landing no condition of heat; smoke or fire were observed. Internal engine component suspected problem.


Second narrative: After takeoff at ZZZ RW XXL; and at approximately 500ft AGL; a slight haze was noticed in the cockpit by the flight crew. A few seconds later; the passengers also noticed this in cabin area of airplane. It was then we observed a slight pungent order typical of smoke. At this time we observed a 'baggage fire' alert on the crew alert system. Operating as a crew; we [advised ATC] at this time and made a downwind turn in the airport pattern for runway XXL. With the appropriate checklist for the indicated condition complete; we were cleared to land on runway XXL. The smoke that was observed previously had now dissipated we and turned base to final and made normal landing on runway XXL. After exiting runway XXL at intersection X; we shutdown the aircraft and executed an emergency evacuation using the appropriate checklist. Upon observation after landing no condition of heat; smoke or fire were observed. Internal engine component suspected problem.


Synopsis: CE-680 First Officer reported a fumes event shortly after takeoff resulted in a return to the departure airport.