Date: 201510
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Aircraft: A319
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Final Approach
Airspace: Class B ZZZ
ATC / advisory: Tower ZZZ
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Workload; Training / Qualification; Situational Awareness; Distraction; Communication Breakdown
Second reporter function: Pilot Not Flying; Captain
Anomaly: Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway; Inflight Event / Encounter Unstabilized Approach; Inflight Event / Encounter Weather / Turbulence
Detector: Person Flight Crew
When detected: In-flight; Taxi
Result: Flight Crew Executed Go Around / Missed Approach; Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Contributing factors: Human Factors; Procedure; Weather
Primary problem: Human Factors

Narrative: The main event on this flight was forgetting to put the gear down on approach. A large factor of this were smaller events earlier in the flight that distracted me while on approach. Our initial taxi clearance out gave us a runway we weren't expecting. I had 28R programmed in; and we were then assigned 22L. I read back the assigned runway and taxi instructions correctly. I went 'heads down' immediately to get the FMGC set with new runway and performance. I thought the Captain knew where he was going. When I looked up; instead of going clockwise around the airport on A taxiway; we had ended up on taxiway Bravo at A15. We had gone counter clockwise; completely the wrong way. Ground issued us a clearance to continue from that point. I am newly based in this domicile. With more experience at the field; I feel like I would have had more SA. I should have stayed with the Captain for the initial turn out of the gate to make sure we were headed in the right direction.The second smaller event occurred on downwind to 23R. ATC had us stay high on the arrival for traffic. After a new descent clearance; I needed spoilers. I inadvertently reached for the flap lever instead of the spoilers. The slats extended slightly; and as soon as the ECAM came on for the flap overspeed; I retracted them. I am also new to the airplane. I feel that my inexperience led to that mistake.After the taxi mistake on departure; I kept thinking about it. It was bothering me. I think that amount of distraction was a factor in making the flap overspeed mistake. After the flap overspeed; I kept thinking about it. It also bothered me. I was worried my mistake would ground the airplane there and delay the next flight. This combination of mistakes; led to yet another error of forgetting to lower the landing gear.I had intercepted the ILS; and the autopilot was on. We configured with Flaps 3 only. We got the ECAM for the gear not down; and we did a go-around for an unstable approach. I am not sure if I ever called for the landing checklist. I was distracted by the flights previous events and I also feel like the fatigue of getting up early for a 5AM show; were the causes of these events.


Second narrative: Visual final with rough conditions due to high winds and turbulence. First officer is new on the airplane and so was really working hard to fly the airplane. We were already under some pressure due to a 45 minute on the ground departure effort. I was trying to listen for a delayed landing clearance and monitor the approach and preformed the landing checklist but did not notice the gear was not extended. At about 500 feet we performed a go around and I flew the subsequent visual approach and landing.


Synopsis: A pilot new to the A319 reported distractions which contributed to a taxi error on departure and a go-around at the destination airport.