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S56 TRACON controller and flight crew reported the pilots descended below the MVA on a crossing restriction on the RNAV arrival.
| Attributes | |
| ACN | 1620029 |
| Time | |
| Date | 201902 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | SLC.Airport |
| State Reference | UT |
| Aircraft 1 | |
| Make Model Name | Light Transport |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Descent |
| Route In Use | STAR Delta5 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 0.5 |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 61 Flight Crew Total 18515 Flight Crew Type 4000 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT |
Narrative:
Aircraft X was inbound on the delta-5 arrival. When the pilot checked in I gave him a descend via clearance. The pilot proceeded to cross drapr at 14;000 feet as published. The next waypoint is spiek at 13;000 feet. After drapr the pilot descended to 11;000 feet. I caught it just as he was leaving the 12;700 foot minimum vectoring altitude (MVA). I confirmed with the pilot that I gave him the descend via clearance and he said yes. I told him the restriction at spiek is 13;000 feet. He said something messed up with the FMS. My scan should have been better to catch that he started to descend before he was supposed to. I caught it after it was already too late. I am not sure if there is a good recommendation. Just need to be scanning to make sure that the pilot is following the instruction that was given.
Original NASA ASRS Text
Title: S56 TRACON Controller and flight crew reported the pilots descended below the MVA on a crossing restriction on the RNAV arrival.
Narrative: Aircraft X was inbound on the Delta-5 arrival. When the pilot checked in I gave him a descend via clearance. The pilot proceeded to cross DRAPR at 14;000 feet as published. The next waypoint is SPIEK at 13;000 feet. After DRAPR the pilot descended to 11;000 feet. I caught it just as he was leaving the 12;700 foot Minimum Vectoring Altitude (MVA). I confirmed with the pilot that I gave him the descend via clearance and he said yes. I told him the restriction at SPIEK is 13;000 feet. He said something messed up with the FMS. My scan should have been better to catch that he started to descend before he was supposed to. I caught it after it was already too late. I am not sure if there is a good recommendation. Just need to be scanning to make sure that the pilot is following the instruction that was given.
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.