Air carrier flight crew reported First Officer descended below assigned altitude on approach resulting in a low altitude alert from ATC.
Synopsis
Air carrier flight crew reported First Officer descended below assigned altitude on approach resulting in a low altitude alert from ATC.
Narrative
While on approach on flight ABCC; ATC had cleared us to 3000 ft as we were on a right downwind parallel of the RNAV Y XXR final approach course. The conditions on the flight were VFR. Then ATC had cleared us down to 2;500 ft as we made a turn to intercept the final approach course. Though; I had mistaken the ATC directive as 2000 ft and had set the ALT window at 2000ft already; which is 300 ft lower than the FAF. Soon followed an advisory by ATC about a low altitude warning. The CA tried to raise the plane's nose via TCS (Touch Control Steering) and to aid the plane back to its proper altitude. As he tried to correct my actions; we were delayed in configuring the plane for landing and the speed was too fast. At this point we had concurred that the aircraft would not meet the stabilized approach criteria and elected to perform a go-around procedure above 1;000 ft AGL since we were at 1;200 ft AGL when we made the decision. we performed that go-around procedure and reattempted that same approach which concluded in a successful 2nd attempt. Suggestions: Verify proper procedures and loudly verbalize the altitude selection. Review plate and the FAF altitude.
Second reporter narrative
Joining the final approach XXR ZZZ ouside of ZZZZZ intersection. Was instructed heading 250 maintain at or above 2500 until established cleared rnav y XXR. At the time of the approach clearance we were level at 3000 joining the final approach course. We received a low altitude alert from ATC. It was at this time i noticed the alt selector was set to 2000 by the first officer. I did not hear the FO ever state 2000 set instead of the 2500. I was under the impression we were taking it from present position and intercepting the GP at 3000. The FO did not recall if he said 2000 set or any altitude selection. I do not believe the call was made upon selecting the altitude. We were 400 below the assigned altitude. I immediately pressed the TCS button and pulled the nose up to re establish the proper altitude. Back on altitude I gave the controls back to he first officer. At this point we were unable to configure in time to meet the proper stable approach criteria and we initiated a missed approach. The go around was runway heading and 4000 feet. We returned to XXR for a normal approach and landing. Reaching the gate the event was de briefed by both crew members as well as a company jump seat pilot on initial observation. The FO acknowledged and understood what happened. He stated he thought he heard 2000 until established. Both myself and the observing pilot heard and confirmed 2500. The approach plate intercept at ZZZZZ is at or above 2300. I regret not catching it faster; the event took place extremely quickly. Suggestions: Ensure that all altitudes selected are called out and slow down. Verify with the approach plate when in question of an assigned altitude.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.