EMB ERJ 170/175 ER/LR
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Training / Qualification
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Hazardous Material Violation
Flight Crew Became Reoriented
Human Factors; Procedure
Flight was conducted as normal; with nothing unusual to note. Prior to pushback; the Captain and I received paperwork for notification of hazardous goods (dry ice) and we verified it was within limits; and also recorded on our load sheet. Once we landed and parked; the Captain and I noticed an individual on the ramp with a clipboard; out of standard ground personnel attire. During my post flight inspection; I said hello; and continued my inspection around the aircraft. A few minutes later; I was deplaning in the jet bridge; and this individual approached me; and identified themselves as an FAA Inspector; asking if they could see a copy of our load sheet. After providing them with the load sheet; and the notification of hazardous goods paperwork; the inspector informed us UN3373 was labeled and onboard the aircraft; but not accounted for in the paperwork. The rampers in [departure station] only documented dry ice onboard; and not UN3373; both were within the same package. We immediately went down to Operations; and made sure the company was aware of this mistake; and contacted the appropriate individuals responsible for Safety and Hazardous Materials. The FAA Inspector; who specialized in Hazardous Materials Safety; informed us that a majority of the time when dry ice is onboard; there is a good chance UN3373 is also in the same package. In the future; whenever I see a notification of dry ice or UN3373; I will make sure to ask the rampers to double check the package and see if [they] are listed together. Additionally; during my preflight inspection; I will try to visually verify the transported materials; and see if they are labeled correctly on our load reports; and hazardous materials paperwork.
ERJ-175 First Officer reported they operated a flight with UN3373 aboard; a restricted item; without it being listed on their hazardous goods manifest.