Narrative:

We had leveled at FL370 for about 10-15 mins, en route from mdw to mht. The first indication of depressurization was felt in our ears. The cabin altitude horn went off next. The cabin altitude was rising rapidly through 17000 ft when we initiated the required actions, declared an emergency, and stated our intent to commence an emergency descent. Our cabin altitude exceeded FL240. No obvious noise, such as a bang, was associated with the event. We kept ATC and the passenger advised during our descent. All passenger masks had deployed as required. We leveled at 10000 ft. No injuries were reported by the flight attendants. We regained pressurization at 10000 ft. We climbed to 13000 ft and proceeded on to our destination of mht, after discussion with dispatch. We made an uneventful landing at mht.

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Original NASA ASRS Text

Title: A B737-300 CAPT RPTED THAT AT FL370 HE COMMENCED AN EMER DSCNT DUE TO LOSS OF PRESSURIZATION. NO INJURIES WERE RPTED AND HE LANDED UNEVENTFULLY AT MHT.

Narrative: WE HAD LEVELED AT FL370 FOR ABOUT 10-15 MINS, ENRTE FROM MDW TO MHT. THE FIRST INDICATION OF DEPRESSURIZATION WAS FELT IN OUR EARS. THE CABIN ALT HORN WENT OFF NEXT. THE CABIN ALT WAS RISING RAPIDLY THROUGH 17000 FT WHEN WE INITIATED THE REQUIRED ACTIONS, DECLARED AN EMER, AND STATED OUR INTENT TO COMMENCE AN EMER DSCNT. OUR CABIN ALT EXCEEDED FL240. NO OBVIOUS NOISE, SUCH AS A BANG, WAS ASSOCIATED WITH THE EVENT. WE KEPT ATC AND THE PAX ADVISED DURING OUR DSCNT. ALL PAX MASKS HAD DEPLOYED AS REQUIRED. WE LEVELED AT 10000 FT. NO INJURIES WERE RPTED BY THE FLT ATTENDANTS. WE REGAINED PRESSURIZATION AT 10000 FT. WE CLBED TO 13000 FT AND PROCEEDED ON TO OUR DEST OF MHT, AFTER DISCUSSION WITH DISPATCH. WE MADE AN UNEVENTFUL LNDG AT MHT.

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.