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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

July 4, 1991 · Boeing 757-232 · N605DL

Alma, GA

Overview

Report Status
Probable Cause
Event Type
Accident
Date
July 4, 1991
Injury Outcomes
1 injury (1 serious injury), 124 uninjured
Location
Alma, GA
Aircraft
Boeing 757-232
Tail Number
N605DL
Operator
Delta Air Lines
Injuries
Serious
NTSB Number
ATL91LA123

THE PILOTS REPORTED THAT THEY WERE DEVIATING AROUND TWO THUNDERSTORM CELLS LOCATED 20 TO 25 MILES EAST OF THEIR POSITION. AS THEY CAME OUT OF THE BOTTOM OF A CIRRUS LAYER, THEY OBSERVED A DISSIPATING CUMULUS CLOUD IN THEIR FLIGHT PATH. THIS CLOUD WAS NOT OBSERVED ON THEIR WEATHER RADAR, AND AVOIDANCE WOULD HAVE REQUIRED AN ABRUPT, VIOLENT MANEUVER. THE FLIGHT CREW ACTIVATED THE SEAT BELT SIGN JUST PRIOR TO CLOUD PENETRATION. THE FLIGHT EXPERIENCED A TURBULENCE EPISODE OF ABOUT FOUR SECONDS IN DURATION. A FEMALE PASSENGER, WHO WAS ENTERING THE LAVATORY AT THE TIME CAUGHT HER FOOT IN THE LAVATORY DOOR, BREAKING HER ANKLE.

NTSB Probable Cause

TURBULENCE IN CLOUDS, WHICH WAS ASSOCIATED WITH A DISSIPATING THUNDERSTORM.

Full Narrative

THE PILOTS REPORTED THAT THEY WERE DEVIATING AROUND TWO THUNDERSTORM CELLS LOCATED 20 TO 25 MILES EAST OF THEIR POSITION. AS THEY CAME OUT OF THE BOTTOM OF A CIRRUS LAYER, THEY OBSERVED A DISSIPATING CUMULUS CLOUD IN THEIR FLIGHT PATH. THIS CLOUD WAS NOT OBSERVED ON THEIR WEATHER RADAR, AND AVOIDANCE WOULD HAVE REQUIRED AN ABRUPT, VIOLENT MANEUVER. THE FLIGHT CREW ACTIVATED THE SEAT BELT SIGN JUST PRIOR TO CLOUD PENETRATION. THE FLIGHT EXPERIENCED A TURBULENCE EPISODE OF ABOUT FOUR SECONDS IN DURATION. A FEMALE PASSENGER, WHO WAS ENTERING THE LAVATORY AT THE TIME CAUGHT HER FOOT IN THE LAVATORY DOOR, BREAKING HER ANKLE.

Flight

Event TypeAccident
Event Time12:07 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBoeing 757-232
Tail NumberN605DL
Aircraft CategoryAir
OperatorDelta Air Lines
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsP&W · 2037 · Turbofan · 37500
Seats178

People & Injuries

Injury Summary1 injury (1 serious injury), 124 uninjured
Fatal0
Serious1
Minor0
Uninjured124
Total125
Crew 1Age 50 · First Class

Conditions

ConditionsIMC
LightDaylight
WindCalm
Visibility7 sm
CeilingOvercast 10000 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time15:58
Weather SourceWFAC

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Appendix: Source Data