Helicopter
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 23
Confusion; Workload; Situational Awareness
ATC Issue All Types; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert
Human Factors; Procedure; Airspace Structure
The aircraft descended to 400 feet prior to the FAF which has crossing restriction of 1500 feet. I noticed the descent then tried to contact the aircraft on my frequency; guard frequency; and through the Tower. The pilot finally contacted Tower. I don't remember if I gave him his position; reference a point on the approach or not. Sometimes I'll turn aircraft onto final; then give them a position when they are closer to the fix before I switch them.I did feel a little pressured. Sectors were combined and we were on an unusual runway configuration.
HCF TRACON Controller observed an aircraft descend below the published FAF altitude.