A319
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 1399
Distraction; Time Pressure
Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
Flight Crew Overcame Equipment Problem
Human Factors; Procedure
We departed the gate on time; and elected to not start the number 2 engine until we had a better idea of takeoff time. We briefed the expected taxi out and were given a taxi clearance slightly different than expected. Shortly after we began taxi; Captain (CA) ordered start of Number 2 engine. I initiated the engine start; and while the engine was starting; we were told to cross the runway and monitor tower. As we crossed the runway; I switched to tower frequency and immediately was told we were next for takeoff and shortly after cleared us to line up and wait with aircraft on 5 mile final. The CA stated that he was unsure of where the taxi line was in relation to 'the block' as there was another aircraft in the block. I looked up to assist; got distracted from my duties; and did not complete the after engine start flow (APU bleed off; APU off; GEN 2 on; PACK 2 on; the before takeoff checklist was completed. At that point; we were advised there was an aircraft on 2.5 mile final. After takeoff; once established on the RNAV SID; I realized my error and advised the CA before turning on generator; pack; and shutting off APU.
[Report narrative contained no additional information.]
A319 flight crew reported being rushed during takeoff resulting in the non-completion of the post engine start checklist.