Emb-145 flight crew reported odd odor in the cockpit shortly after changing ventilation configuratio...

Attributes
ACN	1640000
Time
Date	201904
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dawn
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

I changed pack 2 from flight attendant controlled to pilot controlled. An odd odor began to develop; but no visible smoke was seen. I inquired with the first officer to confirm the strange smell. First officer agreed. I didn't feel too well; so I donned my mask and immediately felt better. The first officer did not don; but said the smell dissipated shortly after I donned my mask. I set up communications to mask; yet the first officer was unable to hear me. I got the QRH out; and we called the flight attendant to see if she [smelled] it as well. Flight attendant walked through the cabin and confirmed. Flight attendant was unable to hear me. Flight attendant walked through the cabin again; and said it was only near the cockpit door and she was coughing. None of us detected any fire or smoke. I removed my mask; and confirmed there was no longer a stench. Flight attendant did a final walk through the cabin and confirmed the smell had completely dissipated.detected when a configuration change to pack 2 was made. The aircraft had recently been written up multiple times for bleed issues. I suspect this may have had something to do with the unknown stench.it was concerning the mask tested well for first flight of the day; but no one was able to hear me. The first officer stayed; I did not come through the intercom at all. The flight attendant stated she just couldn't hear much of anything ever; due to the loud noise from the main door.

Original NASA ASRS Text

Title: EMB-145 flight crew reported odd odor in the cockpit shortly after changing ventilation configuration in flight. Flight Attendant reported the odor as well.

Narrative: I changed Pack 2 from flight attendant controlled to pilot controlled. An odd odor began to develop; but no visible smoke was seen. I inquired with the First Officer to confirm the strange smell. First Officer agreed. I didn't feel too well; so I donned my mask and immediately felt better. The First Officer did not don; but said the smell dissipated shortly after I donned my mask. I set up communications to mask; yet the First Officer was unable to hear me. I got the QRH out; and we called the Flight Attendant to see if she [smelled] it as well. Flight Attendant walked through the cabin and confirmed. Flight Attendant was unable to hear me. Flight Attendant walked through the cabin again; and said it was only near the cockpit door and she was coughing. None of us detected any fire or smoke. I removed my mask; and confirmed there was no longer a stench. Flight Attendant did a final walk through the cabin and confirmed the smell had completely dissipated.Detected when a configuration change to Pack 2 was made. The aircraft had recently been written up multiple times for bleed issues. I suspect this may have had something to do with the unknown stench.It was concerning the mask tested well for first flight of the day; but no one was able to hear me. The First Officer stayed; I did not come through the intercom at all. The Flight Attendant stated she just couldn't hear much of anything ever; due to the loud noise from the main door.

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.

Emb-145 flight crew reported odd odor in the cockpit shortly after changing ventilation configuration in flight. Flight attendant reported the odor as well.