Narrative:

After a non-event takeoff, the flight attendant called during climb and reported a peculiar odor in the cabin. A short time later she called and said it was hot. I told her it was as cool as I could get it. She told me that the passenger were having a hard time breathing in the cabin. I told ATC we need to return to lax for landing. Then the flight attendant called again and reported smoke in the cabin. An emergency was declared. Within a few seconds of this communication, the flight attendant called and said the smoke was gone. After landing on runway 24R at lax an emergency evacuate/evacuation was performed. After the evacuate/evacuation, the appropriate maintenance entry was made. Supplemental information from acn 584638: we landed runway 24R. Crash fire rescue equipment inspected aircraft prior to and after evacuate/evacuation.

Google
 

Original NASA ASRS Text

Title: EMER DECLARED WITH A HIGH CABIN TEMP, SMOKE AND FUMES IN AN SF340 AND AN ASSOCIATED REQUEST FOR CFR VEHICLES BY THE PIC IN A RETURN AND LAND AT LAX, CA.

Narrative: AFTER A NON-EVENT TKOF, THE FLT ATTENDANT CALLED DURING CLB AND RPTED A PECULIAR ODOR IN THE CABIN. A SHORT TIME LATER SHE CALLED AND SAID IT WAS HOT. I TOLD HER IT WAS AS COOL AS I COULD GET IT. SHE TOLD ME THAT THE PAX WERE HAVING A HARD TIME BREATHING IN THE CABIN. I TOLD ATC WE NEED TO RETURN TO LAX FOR LNDG. THEN THE FLT ATTENDANT CALLED AGAIN AND RPTED SMOKE IN THE CABIN. AN EMER WAS DECLARED. WITHIN A FEW SECONDS OF THIS COM, THE FLT ATTENDANT CALLED AND SAID THE SMOKE WAS GONE. AFTER LNDG ON RWY 24R AT LAX AN EMER EVAC WAS PERFORMED. AFTER THE EVAC, THE APPROPRIATE MAINT ENTRY WAS MADE. SUPPLEMENTAL INFO FROM ACN 584638: WE LANDED RWY 24R. CFR INSPECTED ACFT PRIOR TO AND AFTER EVAC.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.