Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Other / Unknown
Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors
We received a clearance to descend to FL240 and then descend via the Korry 3 arrival. We were currently at FL270; I set 24;000 in the altitude selector; we both verified the altitude; and then I asked the First Officer if he wanted me to select a different altitude for the Korry 3. He told me to set 10;000. I set 10;000; we again verified the altitude; and then failed to immediately descend to 24;000. The First Officer was discussing something with the jumpseater. I was distracted by constantly listening for our new call sign; and didn't notice that he didn't descend immediately. It wasn't but a minute or two; and ATC queried us on our clearance. We verified it and the First Officer started descending. The added concentration of listening for [for our new call sign] is a distraction in itself. Obviously paying more attention would avoid this situation from recurring.
CRJ-700 Captain reports being cleared to descend now to FL240 then descend via the KORRY 3 arrival. A cockpit discussion with the jumpseater results in the descent not being initiated until reminded by ATC.