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Two TRACON controllers reported that an aircraft was assigned a descent to 6;000 feet; and read back the clearance correctly. The aircraft descended to 4;000 feet and below the minimum vectoring altitude for its area; before the controller noticed and climbed it back to 4;500 feet.
| Attributes | |
| ACN | 1311280 |
| Time | |
| Date | 201511 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | CKB.Airport |
| State Reference | WV |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Light Transport |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 1.0 |
| Person 2 | |
| Function | Supervisor / CIC Approach |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 3.0 |
| Events | |
| Anomaly | Conflict Ground Conflict Less Severe Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT |
Narrative:
I was working approach east when an aircraft checked in descending out of 16;000 feet for 11;000 feet. I told him to expect the visual approach runway and to continue decent to 6;000 feet. He read back that he would expect the visual to 21 and descend and maintain 6;000. About 5 minutes later the low altitude alert went off and I noticed him descending through 4;000 feet. I immediately told him to climb to 4;500 and turned on the emergency map to make sure there were no obstructions in his path. With no obstructions in his path; he safely climbed.keeping up your scan to make sure the pilots are following your instructions.
Original NASA ASRS Text
Title: Two TRACON Controllers reported that an aircraft was assigned a descent to 6;000 feet; and read back the clearance correctly. The aircraft descended to 4;000 feet and below the minimum vectoring altitude for its area; before the controller noticed and climbed it back to 4;500 feet.
Narrative: I was working Approach East when an aircraft checked in descending out of 16;000 feet for 11;000 feet. I told him to expect the visual approach runway and to continue decent to 6;000 feet. He read back that he would expect the visual to 21 and descend and maintain 6;000. About 5 minutes later the low altitude alert went off and I noticed him descending through 4;000 feet. I immediately told him to climb to 4;500 and turned on the emergency map to make sure there were no obstructions in his path. With no obstructions in his path; he safely climbed.Keeping up your scan to make sure the pilots are following your instructions.
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.