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NTSB Report
August 29, 1991 · Boeing 767-232 · N115DA
Los Angeles, CA
Overview
Report Status
Probable Cause
Event Type
Incident
Date
August 29, 1991
Injury Outcomes
No injuries (120 uninjured)
Location
Los Angeles, CA
Aircraft
Boeing 767-232
Tail Number
N115DA
Operator
Delta Airlines
Injuries
None
Aircraft Damage
Minor
NTSB Number
LAX91IA376
DURING THE TAKEOFF ROLL, A BOEING 767-232, EXPERIENCED AN UNCONTAINED FAILURE OF THE NUMBER 1 ENGINE HIGH PRESSURE TURBINE WHEEL. PORTIONS OF THE TURBINE DISK EXITED THE ENGINE CASE, PRODUCING A 4-INCH BY 16-INCH RUPTURE. PIECES OF THE DISK AND THE 2ND STAGE NOZZLE WERE FRAGMENTED AND PRODUCED SHRAPNEL LIKE PROJECTILES THAT PIERCED THE ENGINE CORE COWLING AND SURROUNDING ENGINE PYLON MOUNT. THE FIRST OFFICER, FLYING THE AIRPLANE, ABORTED AND THE TAKEOFF AND RETURNED TO THE DEPARTURE GATE. EXAMINATION OF THE DISK DISCLOSED THAT IT FRACTURED DUE TO FATIGUE FROM AN UNDETERMINED ORIGIN.
NTSB Probable Cause
THE FRACTURE OF THE NUMBER 1 HIGH PRESSURE TURBINE WHEEL DUE TO FATIGUE, FROM AN UNDETERMINED ORIGIN.
Full Narrative
DURING THE TAKEOFF ROLL, A BOEING 767-232, EXPERIENCED AN UNCONTAINED FAILURE OF THE NUMBER 1 ENGINE HIGH PRESSURE TURBINE WHEEL. PORTIONS OF THE TURBINE DISK EXITED THE ENGINE CASE, PRODUCING A 4-INCH BY 16-INCH RUPTURE. PIECES OF THE DISK AND THE 2ND STAGE NOZZLE WERE FRAGMENTED AND PRODUCED SHRAPNEL LIKE PROJECTILES THAT PIERCED THE ENGINE CORE COWLING AND SURROUNDING ENGINE PYLON MOUNT. THE FIRST OFFICER, FLYING THE AIRPLANE, ABORTED AND THE TAKEOFF AND RETURNED TO THE DEPARTURE GATE. EXAMINATION OF THE DISK DISCLOSED THAT IT FRACTURED DUE TO FATIGUE FROM AN UNDETERMINED ORIGIN.
Flight
Event TypeIncident
Event Time13:17 PDT
Nearest AirportLos Angeles (1nm ENE)
Runway25
Runway Length12091 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing 767-232
Tail NumberN115DA
Aircraft CategoryAir
DamageMinor
OperatorDelta Airlines
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsGe · CF6-80A2 · Turbofan · 48670
Seats204
People & Injuries
Injury SummaryNo injuries (120 uninjured)
Fatal0
Serious0
Minor0
Uninjured120
Total120
Crew 1Age 50 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 11 kt
Visibility5 sm
CeilingNone
Temperature / Dew Point59
Altimeter30.00 inHg
Observation Time19:50
Weather SourceWFAC