Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 134.88; Flight Crew Total 996.33; Flight Crew Type 996.33
Training / Qualification; Communication Breakdown; Distraction
Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented
Human Factors; Environment - Non Weather Related
On the arrival into ZZZ on the ZZZZZ1X arrival; we were told to maintain 250 knots to ZZZZZ; cleared the approach; ILS DME X rwy XXR. We had LNAV and VNAV engaged; I recommended the FAF altitude of 1300 feet be set in the MCP altitude window; the PF; F/O agreed and I set it. The controller told us to slow to 190 knots followed by a slow now call; the F/O (first flight from a long break; several months) was a little hesitant to get it done; so I told him he could hand fly bringing the nose up to slow aside from the speed brakes that he was using; or he could use vertical speed and decrease the descent rate VNAV was currently giving him. He opted to use the vertical speed. I got a call to switch to the Tower; as I did; I got distracted from resetting the MCP altitude of 2000 feet for the mandatory fix altitude at ZZZZZ1. We crossed ZZZZZ1 at approximately 1700 feet. Recognizing this; I had him climb back up to 2000 feet until we intercepted the glide path. We were visual with the runway the entire time and the aircraft in front of us; that is perhaps the reason I wasn't giving due diligence to my approach plate.
Air Carrier Captain reported an altitude deviation.