EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
Climbing through 10;000 feet right over ZZZ VOR; I noticed an ozone/oil odor in the cockpit. I mentioned it to my FO and he said he smelled something abnormal as well. Immediately; I received a call from my Flight Attendant asking if we smelled anything. We donned crew oxygen; ran the QRH; [notified ATC] and diverted back to ZZZ. After landing; we had ARFF inspect us and taxied back to the gate. Upon removing our oxygen masks; we still smelled the fumes - as did Maintenance Personnel when they entered the aircraft. The Flight Attendant mentioned that passengers as far back as row 13 could smell the fumes as well.
Approximately 10 minutes after departure [at] 13;000 feet; CA mentioned an abnormal odor possibly ozone or oil burning. I confirmed I smelled something abnormal as well. A few moments after CA mentioned the odor; Flight Attendant called the cockpit and asked if we smelled an odor and we confirmed the odor was in both in cockpit and cabin. At that time the CA donned his oxygen mask. CA then asked to run the QRH. I donned my mask and ran the QRH. CA then decided to divert back to ZZZ and [notified ATC]. CA flew the plane while I maintained communications with ATC and provided updates and requests. Upon landing; CA communicated with emergency vehicles and confirmed no signs of smoke or fire. We taxied to the gate and CA shutdown the aircraft. Identification: CA initially noticed the smell. I concurred. The FA also called to notify us of a cabin smell as we were discussing the smell. Unknown at this time what caused the odor.
EMB-145 flight crew reported detecting an 'ozone or oil' odor during climbout. After completing the QRH procedure crew executed an uneventful return to departure airport.