B737-900
Physiological - Other
Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
We arrived for our overnight flight and when the Customer Service Agent opened the aircraft door; there was an odor and a slight haze in the plane. We walked off the plane and discussed with the pilots that it was not safe to be onboard. The Supervisor showed up and said this was a regular issue when it is so cold and there is nothing they can do about it. The pilots had them disconnect the ground feed and started the APU. We cracked the doors to get fresh air and waited for the smell to dissipate before boarding the plane. Determine what is causing this fume issue and either maintain or reposition the equipment do the fumes are not entering the plane.
Boarded the aircraft into a haze of carbon monoxide fumes from the external air unit so strong we all immediately got a headache and we exited the aircraft into the jetway! We had to delay boarding because we needed to get the fumes out of the cabin before we brought small children and all passengers on board. Every station that has that has a external air unit needs a safe exhaust system that is nowhere near the aircraft.
B737-900 Flight Attendant crew reported haze and odor upon arrival. The entire cabin crew experienced physiological issues.