Narrative:

I smelled an acrid smell in cabin. Looked to see if passenger lit a match. Smell came and went in short durations for about 1 min. About 5 mins after this event I felt the aircraft lose altitude. About 12 mins passed and the #1 flight attendant informed me we lost an engine and were turning back.

Google
 

Original NASA ASRS Text

Title: MD80 FLIGHT ATTENDANT REPORTS ACRID SMELLS IN THE CABIN SHORTLY BEFORE THE ACFT BEGINS TO LOSE ALTITUDE AND THE FLT CREW ANNOUNCES ENGINE FAILURE AND RETURN TO DEPARTURE ARPT.

Narrative: I SMELLED AN ACRID SMELL IN CABIN. LOOKED TO SEE IF PAX LIT A MATCH. SMELL CAME AND WENT IN SHORT DURATIONS FOR ABOUT 1 MIN. ABOUT 5 MINS AFTER THIS EVENT I FELT THE ACFT LOSE ALT. ABOUT 12 MINS PASSED AND THE #1 FLT ATTENDANT INFORMED ME WE LOST AN ENG AND WERE TURNING BACK.

Data retrieved from NASA's ASRS site as of January 2009 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.