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Boi TRACON controller and flight crew reported an aircraft descended below the issued altitude and below the MVA.
| Attributes | |
| ACN | 1519166 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | BOI.TRACON |
| State Reference | ID |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Medium Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
I was working handoff bzn for the bzn radar controller because of the volume and complexity of traffic coming in [and it was a busy] weekend. Just now had the situation with another aircraft busting an MVA and the radar controller cleared aircraft X direct to bzn to maintain 11000. Aircraft X read back direct bzn; maintain 10000. We were both focused on the prior MVA bust (and vectors for resequence) a few minutes before and missed the readback. Next thing we know; aircraft X is level at 10000 in an 11000 MVA. Radar controller issued low altitude alert. Volume and complexity were contributing factors. Initiating flow into bzn during busy spurts like the one above would alleviate missed readbacks and keep controllers more focused.
Original NASA ASRS Text
Title: BOI TRACON Controller and flight crew reported an aircraft descended below the issued altitude and below the MVA.
Narrative: I was working handoff BZN for the BZN radar controller because of the volume and complexity of traffic coming in [and it was a busy] weekend. Just now had the situation with another aircraft busting an MVA and the radar controller cleared Aircraft X direct to BZN to maintain 11000. Aircraft X read back direct BZN; maintain 10000. We were both focused on the prior MVA bust (and vectors for resequence) a few minutes before and missed the readback. Next thing we know; Aircraft X is level at 10000 in an 11000 MVA. Radar Controller issued low altitude alert. Volume and complexity were contributing factors. Initiating flow into BZN during busy spurts like the one above would alleviate missed readbacks and keep controllers more focused.
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.