Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor
Flight Crew Last 90 Days 21; Flight Crew Total 10204; Flight Crew Type 6499
Situational Awareness; Distraction; Training / Qualification
Deviation - Altitude Undershoot; Deviation - Altitude Crossing Restriction Not Met; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Flight Crew Became Reoriented
Human Factors
We were approaching ZZZZZ intersection from the west which is a transition onto the ZZZZZ 3 arrival and had received multiple descent clearances out of our cruising altitude of FL350. Eventually we were cleared to cross ZZZZZ at FL230. Flying the ZZZZZ 3 'as published' we would normally cross ZZZZZ1 at FL230 per the STAR and the FMS altitude crossings were set for this. ZZZZZ is 14 miles prior to ZZZZZ1 so crossing ZZZZZ at FL230 requires a change in the FMS and a steeper descent. We acknowledged the clearance and a few minutes later while performing a challenge and response descent checklist and when flying overhead ZZZZZ I realized that we were still on the original profile descent to cross ZZZZZ1 at FL230 and we were crossing ZZZZZ above our assigned altitude of FL230.I attribute this error to our reduced amount of flying in the past 12 months due to the COVID lock down and to distraction by the descent checklist.
Corporate Captain reported an altitude deviation during approach and cited lack of flying as a contributing factor.