MIA93LA110

NTSB accident investigation · Boeing 757-232 · Miami, FL · April 27, 1993

Accident · Serious injuriesLimited investigationFinal report
Date
April 26, 1993, 22:18 local (Apr 27, 1993, 02:18 UTC)
Place
Miami, FL
Injuries
1 serious, 61 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N646DLBoeing 757-232
Weather
Instrument (IMC) · Night/dark
Status
Completed · report November 3, 1993
Report
Approved by Office Director
FAA report
19930426037469A
Case key
33261

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

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Probable cause

The failure of the pilot-in-command to anticipate turbulence in observed weather and request that flight attendants be seated, before encountering the observed weather.

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 weatherDescent - normal
Weather condition - thunderstorm,level ii
Weather condition - turbulence in clouds
Weather evaluation - inaccuratePilot in commandFactor
Crew/group briefing - not performedPilot in commandCause

Analysis

The flight encountered turbulence while descending through 11,000 feet on initial approach to Miami, Florida. The aircraft was operating near a level two radar echo and the captain reported they were crossing a narrow band of clouds and were in clouds at the time of the turbulence encounter. After exiting the clouds the captain observed a thunderstorm cell 7 to 8 miles south of their position. No significant weather was showing on the aircraft's radar at the time of the encounter according to the captain. A flight attendant who was exiting the aft lavoratory was lifted off the floor during the turbulence encounter and sustained an ankle injury when she landed. She was wearing 2-inch high heel shoes at the time of the accident. She stated the seatbelt sign was on at the time and all passengers were seated. The cockpit crew had made no announcements for flight attendants to be seated.

Aircraft

Registration
N646DL
Reported as
Boeing 757-232
Category
Airplane
Serial number
24217
Airframe hours
14,176
Engine
P&W PW2037, 37,530 lbs thrust, turbo fan
Damage
No damage
Flight
Part 121
Operator
Delta Air Lines, Inc.
Registered owner
Delta Air Lines, Inc.
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · April 25, 1993
Departed
ATL · Atlanta, GA
Flight plan
IFR

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
49
Certificates
Airline transport, Flight engineer
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
9,500 total · 2,800 in this make and model · 180 in the last 90 days · 7 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
150° at 5 knots
Visibility
7 statute miles
Lowest ceiling
4,000 ft broken
Temperature
75 °F, dew point 70 °F
Altimeter
30.00 inHg
Observed at
MIA, 30 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.