During preflight two A319 flight attendants reported a 'smelly socks' or 'scorched' smell mid to aft...

Narrative:

Approximately 20 minutes to departure; with APU providing air conditioning; a flight attendant reported 'smelly socks' and/or 'scorched' smell from emergency exit row extending into the aft galley. I shut off APU bleed; then called maintenance and started to gather information as I did not notice the smell. The flight attendant in the aft galley confirmed odor. I completed odor form made entry in fdml. After discussion with crew; mechanics and dispatcher; we decided best course of action was to remove passengers and crew while maintenance was troubleshooting and we switched aircraft for the flight. All weather and aircraft configuration were reported on odor form. One flight attendant reported a headache. No other known crew or passenger issues.

Original NASA ASRS Text

Title: During preflight two A319 Flight Attendants reported a 'smelly socks' or 'scorched' smell mid to aft cabin so the aircraft was removed from service for troubleshooting.

Narrative: Approximately 20 minutes to departure; with APU providing air conditioning; a Flight Attendant reported 'smelly socks' and/or 'scorched' smell from emergency exit row extending into the aft galley. I shut off APU bleed; then called maintenance and started to gather information as I did not notice the smell. The Flight Attendant in the aft galley confirmed odor. I completed odor form made entry in FDML. After discussion with crew; mechanics and Dispatcher; we decided best course of action was to remove passengers and crew while maintenance was troubleshooting and we switched aircraft for the flight. All weather and aircraft configuration were reported on odor form. One Flight Attendant reported a headache. No other known crew or passenger issues.

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.

Attributes
ACN	971327
Time
Date	201109
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Illness Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

During preflight two A319 flight attendants reported a 'smelly socks' or 'scorched' smell mid to aft cabin so the aircraft was removed from service for troubleshooting.