Date: 201508
Local time of day: 1801-2400
Location: MIA.Airport, FL
Flight conditions: VMC
Aircraft: EMB ERJ 170/175 ER/LR
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Flight phase: Landing
Airspace: Class B MIA
ATC / advisory: Tower MIA
Second aircraft: B767 Undifferentiated or Other Model
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Anomaly: Inflight Event / Encounter Wake Vortex Encounter
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Executed Go Around / Missed Approach
Contributing factors: Environment - Non Weather Related; Procedure
Primary problem: Environment - Non Weather Related

Narrative: I was Pilot Flying and had an uneventful flight until I approached the flare on Runway 12 in MIA. Captain was Non Flying Pilot (NFP). As I brought the aircraft into the flare; the auto-throttles retarded the thrust to idle as normal. The Captain and I were waiting on the main gear to make contact with the runway as normal; as I listened to the radar altimeter count down from 20 and 10 at a normal descent rate. That's when I began to experience irregularity with the aircraft handling. Suddenly; the left wing dropped aggressively causing the left main gear to slam to the runway. The momentum from that impact caused the aircraft to roll to the right and then the right main made firm contact with the runway as the left main came off the ground. At that point; I decided the aircraft was not in control to land and I initiated a go-around. Honestly; it happened so fast that in the heat of the moment I don't remember if I hit the TOGA button or not; but I must have missed the button because I don't recall the TOGA thrust mode becoming active. I did however firewall the thrust levers because of how fast the event was unfolding; and the need for thrust immediately. While I was advancing the throttles; the Captain called for a go around also. The auto throttles appeared to disengage from my overriding input. The engines were at idle already from the flaring position the aircraft was in; and it took about 5 seconds for the engines to spool up. In the mean time; the aircraft nose gear made contact with the runway; but the aircraft seemed to balloon back off the runway from the rebound. The airplane felt like it was starting a porpoise-like oscillation. I was able to regain control of the airplane; and stabilized the aircraft in ground effect until the engines were producing thrust and we started to climb. From there; we were able to successfully go around. We departed back southeast bound and were vectored for a visual approach to Runway 09. I landed the aircraft without incident and we taxied to the gate without further incident. We decided it would be prudent to have Maintenance come out and inspect the aircraft for a possible hard landing. There was no sign of visible aircraft damage on our post flight inspection. Afterwards; the Captain and I discussed what had happened a bit more. I explained to the Captain I all of a sudden lost control of the airplane as it suddenly seemed to lose lift on the left wing causing an abrupt and uncontrollable roll. We agreed we had probably encountered wake turbulence in the flare. A heavy 767 had landed just prior to our arrival; and the rotation I experienced felt consistent with wake turbulence I've experienced in flight.There isn't much to be said about the event itself; as it was not predictable and I had to react out of instinct to get the airplane flying again. However; this was the first time I ever had a go-around in the airplane in the year and a half I've been flying for [this airline]. The event itself and the go around were a lot more intense than I expected; and I think that adds to part of the confusion my mind faced during the event. I think I expected a successful landing; and the thought of a go-around had never crossed my mind so I wasn't mentally prepared for having to do it. I wish now looking back I had seen one before in real life; as impractical is that may be. I also learned to always anticipate a go-around from a landing. Even down as far as 10' above the ground - in truly the worst place I would have to go-around; it could happen. Practicing a go around in this condition may be helpful as a sim scenario in the future. Also; the heat of the moment in the go-around itself. I would have liked to be more 'automatic' with the go around procedure. I need to review that mentally more often so when I have to do it again; I'll be completely ready to act than be startled. In the sim; I would always know when it was coming. Even if it didn't happen; I was fresh and ready for anything. Most of that I would say is expecting a successful landing and an error on my part; but I haven't done a go-around for over 6 months in any capacity. An SOP refresher in AQP might be a nice integration for irregular operations.




Synopsis: ERJ-175 First Officer reported encountering wake turbulence at touchdown in MIA that resulted in a left and right roll so a go-around was executed.