 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Msn TRACON controller reported not detecting an aircraft read back the wrong altitude and it descended below the minimum vectoring altitude.
| Attributes | |
| ACN | 1558728 |
| Time | |
| Date | 201807 |
| Place | |
| Locale Reference | MSN.TRACON |
| State Reference | WI |
| Aircraft 1 | |
| Make Model Name | Regional Jet 700 ER/LR (CRJ700) |
| 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 |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 12 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
I was vectoring an aircraft on a 6 mile right base. I descended the aircraft to the minimum vectoring altitude (MVA) of 3;500 feet. The low altitude alert went off as the aircraft was past the obstacle descending through 2;700 feet. After reviewing data I missed the read back. Aircraft X read back 2;500 not 3;500. The aircraft crossed the obstacle at 3;000 feet; five hundred feet below the MVA. I should not have used an altitude such as three thousand five hundred that can easily sound like two thousand five hundred. I should vector to avoid overflight of antennas and be more proactive on read backs.
Original NASA ASRS Text
Title: MSN TRACON Controller reported not detecting an aircraft read back the wrong altitude and it descended below the Minimum Vectoring Altitude.
Narrative: I was vectoring an aircraft on a 6 mile right base. I descended the aircraft to the Minimum Vectoring Altitude (MVA) of 3;500 feet. The Low Altitude alert went off as the aircraft was past the obstacle descending through 2;700 feet. After reviewing data I missed the read back. Aircraft X read back 2;500 not 3;500. The aircraft crossed the obstacle at 3;000 feet; five hundred feet below the MVA. I should not have used an altitude such as three thousand five hundred that can easily sound like two thousand five hundred. I should vector to avoid overflight of antennas and be more proactive on read backs.
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.