Widebody Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 6
Confusion; Distraction
Deviation - Altitude Crossing Restriction Not Met; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance
Human Factors; Procedure
JFK RNAV transition to the ILS 13L is a new procedure into JFK. Today I worked numerous arrivals via this approach with the RNAV transition. Aircraft X asked me to verify that he continues the approach after the initial fix cleared from; KMCHI. I verified; explaining after KMCHI to proceed to BUZON before making the turn to the localizer. When I cleared Aircraft X; I told him to cross KMCHI at 2900. Aircraft X crossed KMCHI at 2900 and then started to descend prior to BUZON. I noticed this error at 2600 and told him to climb immediately issuing the altimeter and crossing restriction. Aircraft X descended to 2100 before starting the climb back to 2900. I asked if he was stabilized and ok with the approach; which he said he was. Aircraft X continued and landed with no further issue.I believe it would be helpful to the pilots having mandatory crossing altitudes easily identified on the charts with the bar above and below the altitude. Currently on the approach plate; there is only an altitude between the approach fixes which are hard to see and could be missed.
New York TRACON Controller reported that an aircraft descended below a crossing restriction.