Narrative:

Transient cabin odor detected by flight deck; cabin crew and individual passenger. Odor seemed associated with aft cabin temperature control adjustment; was brief and cleared quickly when a lower temperature was selected.

Google
 

Original NASA ASRS Text

Title: B737-800 Captain reported temporary fume event during cruise that dissipated.

Narrative: Transient cabin odor detected by flight deck; cabin crew and individual passenger. Odor seemed associated with aft cabin temperature control adjustment; was brief and cleared quickly when a lower temperature was selected.

Data retrieved from NASA's ASRS site 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.