Narrative:

Received ECAM smoke lavatory message. Rang flight attendants to find source of smoke/fire. Response was that a male passenger was using aerosol hairspray in aft left lavatory. Once lavatory door was opened; alarm went off (ceased). Two flight attendants were injured in rush to determine cause of fire alarm. Inform passengers through safety demo that detector's will alarm if hairspray is used.

Google
 

Original NASA ASRS Text

Title: A320 Captain reports lavatory smoke alarm activated by aerosol hairspray used by a passenger. Two Flight Attendants are injured in the rush to determine the cause.

Narrative: Received ECAM SMOKE LAVATORY message. Rang Flight Attendants to find source of smoke/fire. Response was that a male passenger was using aerosol hairspray in aft left lavatory. Once lavatory door was opened; alarm went off (ceased). Two Flight Attendants were injured in rush to determine cause of fire alarm. Inform passengers through safety demo that detector's will alarm if hairspray is used.

Data retrieved from NASA's ASRS site as of April 2012 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.