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A11 controller described an altitude deviation during an ILS 7 approach; observing the aircraft descend below the 1;600 altitude assignment with the concurrent activation of the MSAW.
| Attributes | |
| ACN | 946885 |
| Time | |
| Date | 201105 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | A11.TRACON |
| State Reference | AK |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Beech 1900 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Descent |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Person 2 | |
| Function | Pilot Flying Check Pilot Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT |
Narrative:
A beech 1900 was assigned 1;600 with a correct read-back. While monitoring the spacing between two preceding arrivals the beech 1900 descended to 1;100 at which point MSAW activated. A low altitude alert was issued. The sole reason that I'm filing this report is that the MSAW activated appropriately. The system worked the way it was supposed to.
Original NASA ASRS Text
Title: A11 Controller described an altitude deviation during an ILS 7 Approach; observing the aircraft descend below the 1;600 altitude assignment with the concurrent activation of the MSAW.
Narrative: A Beech 1900 was assigned 1;600 with a correct read-back. While monitoring the spacing between two preceding arrivals the Beech 1900 descended to 1;100 at which point MSAW activated. A Low Altitude Alert was issued. The sole reason that I'm filing this report is that the MSAW activated appropriately. The system worked the way it was supposed to.
Data retrieved from NASA's ASRS site as of April 2012 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.