Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Distraction; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem
Environment - Non Weather Related; Human Factors
Bleeds off TO. After starting engines; I turned off APU switch - IAW Normal after start flow. I should have left APU switch on IAW OM XXX.6 (Bleeds off/APU on TO). We did; however; carefully configure bleeds/packs IAW OM XXX.6. We did not subsequently catch that APU switch was off before takeoff. After departure; First Officer reconfigured bleeds/packs IAW with XXX.6 and continued normal flight to ZZZ.This was the 4th line trip I've flown at airline since April 2020. A lack of recency flying into ZZZZ1 and a reliance on the muscle memory/normal after start flows contributed to my error in turning the APU off prematurely. Both the First Officer and I were very aware of the bleeds/packs configuration as we had previously emphasized this TO briefing item at the gate prior to departure. Ultimately; by accurately following the pre-briefed OM 120.6 to reintroduce bleeds/packs after TO we trapped my error and the threat was mitigated.We received ACARS msg and SELCAL warning bleeds/packs off on climbout as First Officer was restoring the bleeds/packs per OM XXX.6. The SELCAL was a helpful reminder/backup to the crew.
Air carrier Captain reported a lack of recency flying and a reliance on the muscle memory/normal after start flows contributed to an error in turning the APU off prematurely.