An MD80 cabin attendant reports in cruise the aft cabin halon fire extinguisher spontaneously began spraying. Wrapped in blanket and placed in locked lavatory.

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Attributes
ACN	648241
Time
Date	200502
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight attendant : on duty
Experience	flight attendant time airline total : 21 flight attendant time total : 21 flight attendant time type : 90
ASRS Report	648241
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other other : 1
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Halon extinguisher deployed during flight for no known reason. I used my uniform and a blanket to stop the spray. Took it out of brackets; wrapped it up; put it in lavatory and locked off lavatory. I think a seal may have broken on the halon. Not sure. My main objective was to get it to stop spraying.

Original NASA ASRS Text

Title: AN MD80 CABIN ATTENDANT RPTS IN CRUISE THE AFT CABIN HALON FIRE EXTINGUISHER SPONTANEOUSLY BEGAN SPRAYING. WRAPPED IN BLANKET AND PLACED IN LOCKED LAVATORY.

Narrative: HALON EXTINGUISHER DEPLOYED DURING FLT FOR NO KNOWN REASON. I USED MY UNIFORM AND A BLANKET TO STOP THE SPRAY. TOOK IT OUT OF BRACKETS; WRAPPED IT UP; PUT IT IN LAVATORY AND LOCKED OFF LAVATORY. I THINK A SEAL MAY HAVE BROKEN ON THE HALON. NOT SURE. MY MAIN OBJECTIVE WAS TO GET IT TO STOP SPRAYING.

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.