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The pilot of small jet reported that while on vectors for rap runway 32; thunderstorms; rain; and down drafts caused him to descend to 4;800 ft; which prompted ATC to issue a low altitude alert as he attempted to correct.
| Attributes | |
| ACN | 1006821 |
| Time | |
| Date | 201204 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | RAP.Airport |
| State Reference | SD |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 27 Flight Crew Total 4950 Flight Crew Type 370 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT Inflight Event / Encounter Weather / Turbulence |
Narrative:
[I was receiving] vectors to ILS runway 32 at rap. Thunderstorms and rain; marginal VFR on IFR flight plan. Ellsworth; descend to 5;300 ft; heading 350 degrees; turbulence and rain downdraft. [I] disconnected autopilot. Arrested descent at 4;800 ft; busting altitude restriction of 5;300 ft. Ellsworth approach called on low altitude; but already disconnected autopilot and corrected. [I] broke out of rain; airport in sight. Visual approach [was] given; 500 ft low. [I] should have corrected sooner.
Original NASA ASRS Text
Title: The pilot of small jet reported that while on vectors for RAP Runway 32; thunderstorms; rain; and down drafts caused him to descend to 4;800 FT; which prompted ATC to issue a low altitude alert as he attempted to correct.
Narrative: [I was receiving] vectors to ILS Runway 32 at RAP. Thunderstorms and rain; marginal VFR on IFR flight plan. Ellsworth; descend to 5;300 FT; heading 350 degrees; turbulence and rain downdraft. [I] disconnected autopilot. Arrested descent at 4;800 FT; busting altitude restriction of 5;300 FT. Ellsworth Approach called on low altitude; but already disconnected autopilot and corrected. [I] broke out of rain; airport in sight. Visual approach [was] given; 500 FT low. [I] should have corrected sooner.
Data retrieved from NASA's ASRS site as of July 2013 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.