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Flight crew descends below step down fix during lda approach at roa. Low altitude alert was issued by tower.
| Attributes | |
| ACN | 824174 |
| Time | |
| Date | 200902 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ROA.Airport |
| State Reference | VA |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Medium Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Local |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
On the lda runway 6 into roa at approximately 1 - 1.5 miles from skirt ATC advised us of a low altitude alert. We were at approximately 2;100 ft so first officer started to correct her altitude and climb as I was checking with ATC the altimeter setting and altitude we were at. As the conversation progressed we realized that the correct altitude was approximately 2;700 ft. While correcting we passed skirt and then started to descend to 1;600 ft. At approximately 1;800 ft the runway and airport came into sight. The event occurred because as we were approaching 4;300 ft at ramke the GS didn't seem to capture so we started with the stepdowns and instead of setting 2;720 ft into the altitude we set 1;600 ft not recognizing we skipped over the altitude at skirt. In order to prevent this again we could do a couple of things differently. 1) if the GS doesn't capture we could ask ATC if they have had any other reports of this to see if it is a reliable source instead of assuming it was inoperative; and 2) review the chart more than once on an arrival that we aren't very familiar with and 3) ask each other when was the last time they shot the approach so you know for yourself if you are comfortable with how well you read the chart.
Original NASA ASRS Text
Title: Flight crew descends below step down fix during LDA approach at ROA. Low altitude alert was issued by Tower.
Narrative: On the LDA Runway 6 into ROA at approximately 1 - 1.5 miles from SKIRT ATC advised us of a low altitude alert. We were at approximately 2;100 FT so First Officer started to correct her altitude and climb as I was checking with ATC the altimeter setting and altitude we were at. As the conversation progressed we realized that the correct altitude was approximately 2;700 FT. While correcting we passed SKIRT and then started to descend to 1;600 FT. At approximately 1;800 FT the runway and airport came into sight. The event occurred because as we were approaching 4;300 FT at RAMKE the GS didn't seem to capture so we started with the stepdowns and instead of setting 2;720 FT into the altitude we set 1;600 FT not recognizing we skipped over the altitude at SKIRT. In order to prevent this again we could do a couple of things differently. 1) If the GS doesn't capture we could ask ATC if they have had any other reports of this to see if it is a reliable source instead of assuming it was inoperative; and 2) Review the chart more than once on an arrival that we aren't very familiar with and 3) Ask each other when was the last time they shot the approach so you know for yourself if you are comfortable with how well you read the chart.
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.