DCA85AA031

NTSB accident investigation · Lockheed L-1011-385-1 · Dallas/Ft Worth, TX · August 2, 1985

Accident · FatalFinal report
Date
August 2, 1985, 18:06 local (23:06 UTC)
Place
Dallas/Ft Worth, TX
Injuries
135 fatal, 15 serious, 13 minor, 2 uninjured; on the ground: 1 fatal, 1 minor
Damage
Destroyed
Phase of flight
Approach
Aircraft
N726DALockheed L-1011-385-1
Weather
Instrument (IMC) · Day
Status
Completed
Report
Board-adopted at Board Meeting
NTSB office
Major Investigations Division
Safety recommendations
Yes
FAA report
19850802077519A
Case key
15836

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherApproach - faf/outer marker to threshold (ifr)
Weather condition - thunderstormFactor
In flight weather avoidance assistance - inadequateFactor
Inadequate surveillance,insufficient staffFaa(organization)Factor
Weather condition - lightningFactor
Flight advisories - not issuedPilot of other aircraftFactor
Weather condition - rainFactor
Weather condition - windshearFactor
Weather condition - unfavorable windFactor
Weather condition - downdraftFactor
Flight into known adverse weather - continuedPilot in commandCause
Procedure inadequateCompany/operator managementCause
Inadequate training(emergency procedure(s))Company/operator managementCause
Go-around - initiated
In flight collision with terrain/waterApproach - faf/outer marker to threshold (ifr)
On ground/water collision with objectApproach - faf/outer marker to threshold (ifr)
Object - vehicleFactor
Object - airport facilityFactor

Analysis

The Safety Board's full report on this investigation is provided as Aviation Accident Report number AAR-86/05. To obtain a copy of this report, or to view the executive summary online, please see the Web site at http://www.ntsb.gov/publictn/publictn.htm

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 complywith delta's wx avoidance proc; there was a lack of specific guidance & training for avoiding/escaping low alt wndshear.

Aircraft

Registration
N726DA
Reported as
Lockheed L-1011-385-1 (L-1011-385)
Category
Airplane
Serial number
193C-1163
Engine
Rolls-Royce RB-211-22B, 41,030 lbs thrust, turbo fan
Damage
Destroyed
Fire
On-Ground
Flight
Part 121
Registered owner
Delta Airlines, Inc.
Airworthiness certificate
Standard, Transport
Departed
FLL · Ft. Lauderdale, FL
Destination
DFW
Flight plan
IFR
Airport
DFW · Dallas/Fort Worth Intl, runway 17L, 11,388 × 150 ft, concrete

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
57
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
29,300 total · 3,000 in this make and model · 166 in the last 90 days · 81 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day
Temperature
100 °F, dew point -0 °F
Altimeter
29.00 inHg
Observed at
DFW, 2 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N726DA · 1

Matched to the same aircraft by N-number and date.