Dallas Ft. Worth, TX, Delta Airlines, Lockheed L-1011-385-1 Crashes Killing 135
AUG-02-85 Psbl scattered thunderstorms (tstms) were forcast & drg arrival, svrl cells were developing in the area. Delta flt 191 was vectored arnd a large cell, then was sequenced bhnd other acft & clrd for an ils rwy 17l apch. The flt crew & svrl preceeding crews saw lightning in a cell north of the arpt, but contd w/o rprtg it. On the apch, flt 191 encountered a microburst while passing under the cell. Initially, the 1st officer, who was flying the acft, retarded the throttles in a headwind. The acft then encountered aprx 73 kts of windshear, up/dwndfts, vortex flow & a tailwind. Go-around pwr was applied, but the acft struck the gnd aprx 6300' north of rwy 17l, hit a car & 2 water tanks, broke apart & burned.
Inv revealed that btn 1752 & 1800 cdt, the tstm cell grew fm vip lvl 1 to vip lvl 4. A center wx svc unit meteorologist was on duty, but not at the radar psn at that time & didn't obsv the cell growth. Capt's decision to cont apch didn't comply with delta's wx avoidance proc; there was a lack of specific guidance & training for avoiding escaping low Alt wndshear. Probable cause: flight into known adverse weather, pilot in command procedure inadequate..company/operator management inadequate training emergency procedure(s)) company/operator management. Contributing factors: weather condition thunderstorm in flight weather avoidance assistance..inadequate..no person specified insufficient staff - surveillance of operation..faa(organization) weather condition..lightning flight advisories..not issued..pilot of other aircraft weather condition..rain weather condition..windshear weather condition..unfavorable wind Weather condition..downdraft object..vehicle object..airport facility. (Listen To The Last Few Moments Of The Crash). You can also ( read the Transcript).
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