What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On initial climb out after departure from msp, at approximately 400 feet AGL, pilots reported that acm (air cycle machine) overheat warning light illuminated and smoke was noted in the cockpit. An emergency was declared and they proceeded to climb to safe altitude. According to the pilots, the acm overheat light then went out and the smoke started to dissipate. The emergency checklist was run and the aircraft returned to msp and landed without further incident. After shutdown on the ramp, the airport fire department checked the aircraft with their heat sensors and found no irregular indications. The crew noted that the smoke was more of a haze that dissipated shortly after the light went out and they did not feel a need to don smoke goggles or masks.
As the FAA filed it
ON INITIAL CLIMB OUT AFTER DEPARTURE FROM MSP, AT APPROXIMATELY 400 FEET AGL, PILOTS REPORTED THAT ACM (AIR CYCLE MACHINE) OVERHEAT WARNING LIGHT ILLUMINATED AND SMOKE WAS NOTED IN THE COCKPIT. AN EMERGENCY WAS DECLARED AND THEY PROCEEDED TO CLIMB TO SAFE ALTITUDE. ACCORDING TO THE PILOTS, THE ACM OVERHEAT LIGHT THEN WENT OUT AND THE SMOKE STARTED TO DISSIPATE. THE EMERGENCY CHECKLIST WAS RUN AND THE AIRCRAFT RETURNED TO MSP AND LANDED WITHOUT FURTHER INCIDENT. AFTER SHUTDOWN ON THE RAMP, THE AIRPORT FIRE DEPARTMENT CHECKED THE AIRCRAFT WITH THEIR HEAT SENSORS AND FOUND NO IRREGULAR INDICATIONS. THE CREW NOTED THAT THE SMOKE WAS MORE OF A HAZE THAT DISSIPATED SHORTLY AFTER THE LIGHT WENT OUT AND THEY DID NOT FEEL A NEED TO DON SMOKE GOGGLES OR MASKS.