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Air carrier flight crew reported receiving a low altitude alert from ATC due to towers close to the flight path of the aircraft.
| Attributes | |
| ACN | 1745171 |
| Time | |
| Date | 202006 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | SDF.Airport |
| State Reference | KY |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 68 Flight Crew Type 8000 |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 138 Flight Crew Type 6712 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter CFTT / CFIT |
Narrative:
We were at 4;000 feet MSL and approximately 25 NM from the airport on a direct course to slgrr when we were cleared for a visual approach to runway 17L at sdf. The first officer set the crossing altitude of 2;500 feet in the MCP window and started a descent. I was looking for a GA aircraft that was on a converging course to the same runway as ours. As we were leveling off; we received a low altitude call from ATC. We visually identified the towers ahead of our position and the first officer initiated a climb to 3;000 feet to increase our separation to the towers. Once the towers were behind us; he resumed the descent to slgrr and completed the approach without further issues.I should have kept a closer watch on the flight path during this approach. A further study of the approach chart shows the towers we saw were quite a bit higher than any others around them; but not the highest obstacle on the chart. This was easily missed in our chart review.
Original NASA ASRS Text
Title: Air carrier flight crew reported receiving a Low Altitude Alert from ATC due to towers close to the flight path of the aircraft.
Narrative: We were at 4;000 feet MSL and approximately 25 NM from the airport on a direct course to SLGRR when we were cleared for a visual approach to Runway 17L at SDF. The First Officer set the crossing altitude of 2;500 feet in the MCP window and started a descent. I was looking for a GA aircraft that was on a converging course to the same runway as ours. As we were leveling off; we received a low altitude call from ATC. We visually identified the towers ahead of our position and the First Officer initiated a climb to 3;000 feet to increase our separation to the towers. Once the towers were behind us; he resumed the descent to SLGRR and completed the approach without further issues.I should have kept a closer watch on the flight path during this approach. A further study of the approach chart shows the towers we saw were quite a bit higher than any others around them; but not the highest obstacle on the chart. This was easily missed in our chart review.
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.