Narrative:

While at cruise altitude at 29;000 ft; the flight attendant (flight attendants) called the flight deck to state there was smoke/fumes coming from the back of the cabin. The pilot flying; captain; stated we need to contact ATC and ask for an immediate descent to [a nearby airport]. The captain donned his O2 mask in the event smoke or fumes reached the flight deck. I; pilot monitoring; contacted ATC for a lower altitude. I donned my O2 mask. We ran the QRH for an emergency descent as well as smoke; fire or fumes. In the descent; the flight attendant attempted to contact us; but we were busy getting the aircraft on the ground. We landed; I contacted the flight attendant's to see if there still smoke or fumes. They stated that no smoke or fumes were noted. We cleared the runway and waited for fire personnel to verify no flames or fire was being observed. They stated all was clear. We taxied to the gate. I realized I hadn't set a lower landing altitude for [the airport we landed at]; so the cabin pressure was still set for [the destination airport]. The fire department boarded the aircraft and could not find a source of the smoke/fumes.I believe we as a crew handled this inflight emergency very well. The captain did an excellent job maintaining aircraft control. Due to the time constraints of dealing with a fire or fumes; I did not get a chance to respond to the flight attendant's during the descent and landing; but I did contact them after we landed. I should have at least contacted them for a brief update as to what was happening in the cabin. Another issue I had was related to the having the O2 mask on; running the correct QRH as well as the radios in a timely manner; which lead me to missing the correct position of the outflow valve and cabin altitude.

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Original NASA ASRS Text

Title: B737 First Officer reported diverting to a nearby airport after being notified of smoke/fumes in the cabin by the Flight Attendants.

Narrative: While at cruise altitude at 29;000 ft; the FA (Flight Attendants) called the flight deck to state there was smoke/fumes coming from the back of the cabin. The Pilot Flying; Captain; stated we need to contact ATC and ask for an immediate descent to [a nearby airport]. The Captain donned his O2 mask in the event smoke or fumes reached the flight deck. I; Pilot Monitoring; contacted ATC for a lower altitude. I donned my O2 mask. We ran the QRH for an emergency descent as well as smoke; fire or fumes. In the descent; the FA attempted to contact us; but we were busy getting the aircraft on the ground. We landed; I contacted the FA's to see if there still smoke or fumes. They stated that no smoke or fumes were noted. We cleared the runway and waited for fire personnel to verify no flames or fire was being observed. They stated all was clear. We taxied to the gate. I realized I hadn't set a lower landing altitude for [the airport we landed at]; so the cabin pressure was still set for [the destination airport]. The Fire Department boarded the aircraft and could not find a source of the smoke/fumes.I believe we as a crew handled this inflight emergency very well. The Captain did an excellent job maintaining aircraft control. Due to the time constraints of dealing with a fire or fumes; I did not get a chance to respond to the FA's during the descent and landing; but I did contact them after we landed. I should have at least contacted them for a brief update as to what was happening in the cabin. Another issue I had was related to the having the O2 mask on; running the correct QRH as well as the radios in a timely manner; which lead me to missing the correct position of the outflow valve and cabin altitude.

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.