B787 Dreamliner Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 200.88; Flight Crew Total 4695.52; Flight Crew Type 786.68
Physiological - Other; Time Pressure; Workload; Distraction; Communication Breakdown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General Flight Cancelled / Delayed
Human Factors
After my walk around I failed to ask if we had Dangerous Goods like I normally do.  Communication with Ramp for push became an issue since they had a bad headset and repeated several attempts to get it to work. Eventually we pushed late due to getting a different headset.This crew doesn't come to ZZZ often and also not familiar with the X gates so we briefed that well and just let those distractions make us forget the final DG. We had also been communicating with Ops on not getting our numbers cause ramp was also distracted and didn't put the bag or cargo info in so we had that on our minds too. [Also to] put final DG on before push check.
On departure in ZZZ we were distracted by the ramp trying several times to get a working headset plugged in--as was the ramp.  This focus on the headset caused the ramp to never enter in our final dangerous goods and bag count into the computer.  It also delayed us several minutes past the early departure we were ready for. I had received a planned dangerous goods form and the final dangerous goods were the same and loaded in the same place as the plan. Fixation on one problem delaying the departure caused me to ignore another problem that should have delayed the departure.  We had to call operations and send messages to  planning to finally get our weights and final dangerous goods a full 15 minutes later.
Air Carrier First Officer reported pushback from departure gate without required Final Dangerous Goods document.