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Temporary loss of aircraft control in an air carrier small transport. Downdraft encounter between thunderstorm activity.
| Attributes | |
| ACN | 307370 |
| Time | |
| Date | 199506 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sps |
| State Reference | TX |
| Altitude | msl bound lower : 6500 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 4000 flight time type : 2000 |
| ASRS Report | 307370 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
I was PF flight, scheduled service from sps to dfw. We had deviated north of course as we worked ourselves around a line of thunderstorms between sps and dfw. Cruising at 7000 ft, we encountered a strong downdraft. We had maximum climb power and were descending at about 200 FPM. We leveled off at 6500 ft MSL and advised ATC of the problem. We returned to 7000 ft as soon as possible. At time of downdraft we were in an area of VMC with the nearest thunderstorm cell about 13 mi south of us. We had cells at 20 mi to the north of our position also. As we entered the downdraft no turbulence was noticed.
Original NASA ASRS Text
Title: TEMPORARY LOSS OF ACFT CTL IN AN ACR SMT. DOWNDRAFT ENCOUNTER BTWN TSTM ACTIVITY.
Narrative: I WAS PF FLT, SCHEDULED SVC FROM SPS TO DFW. WE HAD DEVIATED N OF COURSE AS WE WORKED OURSELVES AROUND A LINE OF TSTMS BTWN SPS AND DFW. CRUISING AT 7000 FT, WE ENCOUNTERED A STRONG DOWNDRAFT. WE HAD MAX CLB PWR AND WERE DSNDING AT ABOUT 200 FPM. WE LEVELED OFF AT 6500 FT MSL AND ADVISED ATC OF THE PROB. WE RETURNED TO 7000 FT AS SOON AS POSSIBLE. AT TIME OF DOWNDRAFT WE WERE IN AN AREA OF VMC WITH THE NEAREST TSTM CELL ABOUT 13 MI S OF US. WE HAD CELLS AT 20 MI TO THE N OF OUR POS ALSO. AS WE ENTERED THE DOWNDRAFT NO TURB WAS NOTICED.
Data retrieved from NASA's ASRS site as of July 2007 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.