Narrative:

Prior to departure for a flight to bos; the crew loaded the quabn 3 arrival into the flight management system. They also received the digital ATIS and loaded in the appropriate landing runway; 22 left. The crew then checked every way point; altitude and airspeed restriction prior to engine start; all were correct. Enroute; prior to reaching the truiz intersection we were cleared; 'descend via the quabn 3 arrival runway to 22 left'. The flying pilot made the appropriate selection on the flight guidance panel and the non-flying pilot selected the lowest altitude required on the arrival of 6000 feet. This was confirmed by the flight crew. Prior to reaching the mnsta intersection air traffic control changed the landing runway from 22 left to 27. At this point the non-flying pilot had to re-select runway 27 and confirm all the way points; altitudes and airspeed restriction with the flying pilot. The flying pilot then had to re-brief the new approach. It was after this that we realize the aircraft descended below the mandatory altitude of 24;000 at the mnsta intersection. The flying pilot disconnected the autopilot and manually flew the aircraft back to 24;000 feet. The rest of the descent was uneventful. While flying this route; sometimes three days a week; we have noticed that air traffic control continuously has runway changes; new altitude restrictions and headings while executing this arrival.

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Original NASA ASRS Text

Title: CL605 First Officer reported overshooting a crossing restriction when cleared via the QUABN 3 Arrival into BOS. Reporter cited late ATC changes to the arrival as contributing.

Narrative: Prior to departure for a flight to BOS; the crew loaded the QUABN 3 arrival into the flight management system. They also received the digital ATIS and loaded in the appropriate landing runway; 22 left. The crew then checked every way point; altitude and airspeed restriction prior to engine start; all were correct. Enroute; prior to reaching the TRUIZ intersection we were cleared; 'Descend via the QUABN 3 arrival runway to 22 left'. The flying pilot made the appropriate selection on the flight guidance panel and the non-flying pilot selected the lowest altitude required on the arrival of 6000 feet. This was confirmed by the flight crew. Prior to reaching the MNSTA intersection air traffic control changed the landing runway from 22 left to 27. At this point the non-flying pilot had to re-select runway 27 and confirm all the way points; altitudes and airspeed restriction with the flying pilot. The flying pilot then had to re-brief the new approach. It was after this that we realize the aircraft descended below the mandatory altitude of 24;000 at the MNSTA intersection. The flying pilot disconnected the autopilot and manually flew the aircraft back to 24;000 feet. The rest of the descent was uneventful. While flying this route; sometimes three days a week; we have noticed that air traffic control continuously has runway changes; new altitude restrictions and headings while executing this arrival.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.