A319
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Troubleshooting
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
General Maintenance Action; General Flight Cancelled / Delayed
Aircraft
APU was turned on. When we turned the bleed on I noticed a smell; turned the bleed off ASAP. Asked the Captain if that was the dirty socks smell. Neither of us were sure. Turned the bleed on for a second to see if the smell came back; it did. Turned bleed off and called Maintenance. I exited the cockpit. There was no smell in the cabin.I wouldn't describe it as dirty socks; more of a smell like you left towels in the washer for too long after washing. It is good to know the smell now for future reference.
I was the #2 [flight attendant] on this flight; so I was in the back galley during boarding. I got a call from the #4 saying that Maintenance was coming onboard to investigate an odor the #4; #1 and Captain started smelling during boarding. I; myself; did not smell the odor. It was determined after Maintenance got onboard that the airplane was going out of service and we were going to change planes. This was after we had all passengers boarded up so we had to deplane. It's also worth noting that the next morning in ZZZ1; that same plane was the one we were flying back to ZZZ. The Captain had Maintenance come and check things out before we boarded up and took off. Maintenance okay-ed it. So; my crew and I flew on this particular aircraft the morning after this odor event.
Air Carrier flight crew reported a fume event during boarding. Maintenance was requested which resulted in aircraft being removed from service.