B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 194; Flight Crew Total 16653; Flight Crew Type 3725
Human-Machine Interface
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General Flight Cancelled / Delayed; General Maintenance Action
Human Factors
During preflight we received a dangerous goods notification form indicating that we would have dry ice type goods onboard. After briefing and door closure the ground crew came on and said they were ready for push. From [gate] no push clearance is required; only an advisory call to ground. After checklist completion I released the brakes so the crew could scoop us. It was then that I realized we had not yet received our final DG (Dangerous Goods). I notified the push crew to hold as we had not yet started to push. We received our final DG and after review I notified the ground crew that we were cleared to push. We then pushed. Although we did not actually push prior to the final DG as stated in the FOM; we had released the brakes. After a discussion we were not sure if brake release had constituted a push even though we had not moved prior to the final DG. The flight continued to destination without issue and was fully debriefed.
B737 Captain reported initiating a pushback before receiving required Hazmat documents.