What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Enroute from Topeka, KS (foe) enroute to tuscaloosa, al (tcl) and during climb through FL230 or FL240 toward assigned altitude of FL270, a moderate amount of smoke began to appear in the cockpit and cabin. The crew notified ATC, declared an emergency, and requested lower altitude. The co-pilot initiated the checklist for environmental smoke. When RH was selected on the pressure source selector the smoke gradually began to dissipate. When le was selected on the pressure source selector smoke began to appear again. The RH position was immediately selected again. The smoke then cleared and no additional smoke occurred during the remainder of the flight. The aircraft returned to foe and landed without incident. There was no indication of ill effects from the smoke with regard to the crew or passengers.
As the FAA filed it
(-23) ENROUTE FROM TOPEKA, KS (FOE) ENROUTE TO TUSCALOOSA, AL (TCL) AND DURING CLIMB THROUGH FL230 OR FL240 TOWARD ASSIGNED ALTITUDE OF FL270, A MODERATE AMOUNT OF SMOKE BEGAN TO APPEAR IN THE COCKPIT AND CABIN. THE CREW NOTIFIED ATC, DECLARED AN EMERGENCY, AND REQUESTED LOWER ALTITUDE. THE CO-PILOT INITIATED THE CHECKLIST FOR ENVIRONMENTAL SMOKE. WHEN RH WAS SELECTED ON THE PRESSURE SOURCE SELECTOR THE SMOKE GRADUALLY BEGAN TO DISSIPATE. WHEN LE WAS SELECTED ON THE PRESSURE SOURCE SELECTOR SMOKE BEGAN TO APPEAR AGAIN. THE RH POSITION WAS IMMEDIATELY SELECTED AGAIN. THE SMOKE THEN CLEARED AND NO ADDITIONAL SMOKE OCCURRED DURING THE REMAINDER OF THE FLIGHT. THE AIRCRAFT RETURNED TO FOE AND LANDED WITHOUT INCIDENT. THERE WAS NO INDICATION OF ILL EFFECTS FROM THE SMOKE WITH REGARD TO THE CREW OR PASSENGERS.