Narrative:

We were on a normal turn out of ZZZ when we had a slide deploy at the front of the airplane on the first officer's side.the flight was progressing as normal. I had my mfd on the status page before push and all doors showed green. We did before start flows and before start checklist. We were cleared to push and also to cleared to start engines shortly thereafter. I reached over and started engine one. The number one engine was fully online and had stabilized when we received a master caution. The EICAS message was saying that the front door on the first officer (first officer) side was ajar. By this time we had completed the push and the ground crew was working on getting the airplane ready for taxi. The captain called back to the flight attendants to check on the door and maybe try to recycle it. We sat there as we heard the flight attendant try to get the door shut. After a few seconds of messing with the door; I heard a loud hiss and the airplane started shaking. At that point we had determined that the slide had been deployed. The flight attendant then called to let us know what had happened. He tried opening the door and then closing it again. This was an honest mistake and had no malicious intent. It was an abnormal situation in a high pressure environment.the cause could've been a quick misinterpretation of wording between the crew. The flight attendant (flight attendant) was told to recycle the door and I've heard that wording can be misinterpreted throughout the whole [company] fleet.change the wording in the in-flight manual for the words 'recycling doors.' I've heard it can mean something different in all the airplanes and I guess maybe it was taken one way or [another] the night of the incident.

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Original NASA ASRS Text

Title: ERJ-175 flight crew reported an inadvertent emergency slide deployment after pushback.

Narrative: We were on a normal turn out of ZZZ when we had a slide deploy at the front of the airplane on the First Officer's side.The flight was progressing as normal. I had my MFD on the status page before push and all doors showed green. We did before start flows and before start checklist. We were cleared to push and also to cleared to start engines shortly thereafter. I reached over and started engine one. The number one engine was fully online and had stabilized when we received a master caution. The EICAS message was saying that the front door on the FO (First Officer) side was ajar. By this time we had completed the push and the ground crew was working on getting the airplane ready for taxi. The Captain called back to the flight attendants to check on the door and maybe try to recycle it. We sat there as we heard the Flight Attendant try to get the door shut. After a few seconds of messing with the door; I heard a loud hiss and the airplane started shaking. At that point we had determined that the slide had been deployed. The Flight Attendant then called to let us know what had happened. He tried opening the door and then closing it again. This was an honest mistake and had no malicious intent. It was an abnormal situation in a high pressure environment.The cause could've been a quick misinterpretation of wording between the crew. The FA (Flight Attendant) was told to recycle the door and I've heard that wording can be misinterpreted throughout the whole [company] fleet.Change the wording in the in-flight manual for the words 'recycling doors.' I've heard it can mean something different in all the airplanes and I guess maybe it was taken one way or [another] the night of the incident.

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.