DC-10 30
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Distraction; Time Pressure
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Hazardous Material Violation
Flight Crew Overcame Equipment Problem; General Maintenance Action
Human Factors
I blocked out without having signed the DG [Dangerous Goods] paperwork. During the preflight we had multiple interruptions and incongruities mostly dealing with MEL related items. The last break in the flow was a last minute discrepancy of jump seaters on the release vs. the actually number on the aircraft. The First Officer went and checked the haz-can and verified it to match the DG manifest. It was at this point in the preflight the DG paperwork needed to be signed. I was sending a message to [Operations] confirming the removal of our jump seater and just missed signing the paperwork. I later realized what had happened. We contacted the ramp and verified with them my approval of the manifest and contacted the Duty Officer who then coordinated with ZZZ to have a signed copy sent to them after landing in ZZZ1. Multiple interruptions in the preflight; not completing my final briefing/confirmation of clearance; fuel slips; and DG complete combined with inadequate signature verification. But really just set the DG manifest down without signing it. Just missed it. Take a step back and confirm all is complete before going below the line on the before start check. Another thing that would be helpful would have been getting a heads up of the js change before noticing it on the WB or a call from ramp with time and initials from [Operations] if it had already been handled.
MD-10 Captain reported Hazmat procedure violation of not signing DG document prior to departure.