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Flight crew of a saab SF340 briefly lost aircraft control due to wake turbulence from an MD11 7 mi ahead of them, 20 mi from dfw at 4000 ft on arrival.
| Attributes | |
| ACN | 472526 |
| Time | |
| Date | 200005 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340A |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine pilot : commercial |
| Experience | flight time last 90 days : 240 flight time total : 7300 flight time type : 5600 |
| ASRS Report | 472526 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | inflight encounter : wake turbulence other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : unable |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Environmental Factor |
| Primary Problem | Environmental Factor |
Narrative:
Cruising in smooth VMC when we were suddenly and violently thrusted downward and then up again. This lasted for 2-3 seconds. TCASII showed no aircraft within a 5 mi radius. I asked regional approach control who we were following and he said an MD11 that was 7 mi ahead. No injuries reported. The aircraft was grounded for inspection.
Original NASA ASRS Text
Title: FLC OF A SAAB SF340 BRIEFLY LOST ACFT CTL DUE TO WAKE TURB FROM AN MD11 7 MI AHEAD OF THEM, 20 MI FROM DFW AT 4000 FT ON ARR.
Narrative: CRUISING IN SMOOTH VMC WHEN WE WERE SUDDENLY AND VIOLENTLY THRUSTED DOWNWARD AND THEN UP AGAIN. THIS LASTED FOR 2-3 SECONDS. TCASII SHOWED NO ACFT WITHIN A 5 MI RADIUS. I ASKED REGIONAL APCH CTL WHO WE WERE FOLLOWING AND HE SAID AN MD11 THAT WAS 7 MI AHEAD. NO INJURIES RPTED. THE ACFT WAS GNDED FOR INSPECTION.
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.