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..Continued..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
NTSB - Aviation accidents index
S/O: Landing Check complete F/O: OK, Thank you CA: This stuff is moving in F/O: We're gonna get our airplane washed S/O: I've got lightning to the right there, Bill F/O: Yah, I see lightning coming out of that one CA: What? F/O: There's lightning coming out of that one! CA: Where? F/O: Right ahead of us TWR: Delta 191 Heavy, runway 17 Left cleared to land RDO: Delta 191 cleared to land. Tower say winds. TWR: Winds are 010 at 5 knots gusting to 15 knots. RDO: Roger three sixty at five. CA: Watch your speed! F/O: Damn. S/O: (Unintelligible) idle TWR: Delta 166 Contact Departure CA: You're gonna lose it all of the sudden, there it is! CA: Push it up! Push it way up! CA: Way up! F/O: Way up! [Sound of Engine Spoolup] CA: That's it CA: Hang on to the son of a bitch! F/O: What's the vee-ref GPWS: Whoop Whoop Pull Up! CA: Toga GPWS: Whoop Whoop Pull Up! CA: Push it way up! GPWS: Whoop Whoop Pull Up! GPWS: Whoop Whoop Pull Up! [Sound of Radio Altimeters Beeping (First bounce)] Unknown: Shit! Unknown: Oh Shit! [Sound of Second Impact] TWR: Delta go Around!