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Mke controller and flight crew reported the crew read back the wrong altitude and descended below the minimum vectoring altitude.
| Attributes | |
| ACN | 1641795 |
| Time | |
| Date | 201905 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | MKE.TRACON |
| State Reference | WI |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | McDonnell Douglas Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent Final Approach |
| 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) 1 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Commercial |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT |
Narrative:
I descended aircraft X to 2;600 feet for the ILS approach. I missed the read back error descending to 2;000 feet. The MVA (minimum vectoring altitude) in the area is 2;400 feet; but 2;600 feet is the minimum altitude to join the localizer. I was prompted to climb aircraft X when I received a low altitude alert. I told aircraft X to check his altitude immediately and climb to 200 feet.well; I know this sort of error has been a hot topic in recent years. Listen for the read back is the obvious answer. On the equipment side; upgrading our technology to add another layer of safety. Allow us or force us to enter the information in the data block to remind yourself of the altitude given or when you get the read back. With that; if the altitude differs by more than 200 feet to give you an alert.
Original NASA ASRS Text
Title: MKE Controller and flight crew reported the crew read back the wrong altitude and descended below the Minimum Vectoring Altitude.
Narrative: I descended Aircraft X to 2;600 feet for the ILS Approach. I missed the read back error descending to 2;000 feet. The MVA (Minimum Vectoring Altitude) in the area is 2;400 feet; but 2;600 feet is the minimum altitude to join the localizer. I was prompted to climb Aircraft X when I received a low altitude alert. I told Aircraft X to check his altitude immediately and climb to 200 feet.Well; I know this sort of error has been a hot topic in recent years. Listen for the read back is the obvious answer. On the equipment side; upgrading our technology to add another layer of safety. Allow us or force us to enter the information in the data block to remind yourself of the altitude given or when you get the read back. With that; if the altitude differs by more than 200 feet to give you an alert.
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.