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Enroute controller reported vectoring an aircraft below minimum IFR altitude and was surpised when the minimum safe altitude alert sounded.
| Attributes | |
| ACN | 985639 |
| Time | |
| Date | 201112 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | M-20 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Inflight Event / Encounter CFTT / CFIT |
Narrative:
A mooney was climbed to 150 earlier for terrain. He requested lower; and I didn't interpret the mia (minimum IFR altitude) chart properly. I descended the aircraft to 140; but his route was taking him in to the edge of a higher mia polygon. When the emsaw alert began flashing; it surprised both the d-side and I... I turned the aircraft away from the terrain block at 140; and resumed them on course once clear. Eram's upcoming ability to display emsaw altitudes on the scope itself should help. I just needed to take a bit longer to evaluate the terrain in the area prior to issuing a clearance.
Original NASA ASRS Text
Title: Enroute Controller reported vectoring an aircraft below minimum IFR altitude and was surpised when the minimum safe altitude alert sounded.
Narrative: A Mooney was climbed to 150 earlier for terrain. He requested lower; and I didn't interpret the MIA (minimum IFR altitude) chart properly. I descended the aircraft to 140; but his route was taking him in to the edge of a higher MIA polygon. When the EMSAW alert began flashing; it surprised both the D-Side and I... I turned the aircraft away from the terrain block at 140; and resumed them on course once clear. ERAM's upcoming ability to display EMSAW altitudes on the scope itself should help. I just needed to take a bit longer to evaluate the terrain in the area prior to issuing a clearance.
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.