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NTSB Report
July 24, 1988 · Boeing 737-222 · N69AF
Miami, FL
Overview
Report Status
Preliminary report
Event Type
Incident
Date
July 24, 1988
Injury Outcomes
No injuries (85 uninjured)
Location
Miami, FL
Aircraft
Boeing 737-222
Tail Number
N69AF
Operator
Pan American World Airways
Injuries
None
Aircraft Damage
Minor
NTSB Number
MIA88IA231
FLT EXPERIENCED FAILURE OF THE NUMBER TWO ENGINE SHORTLY AFTER TAKEOFF WHEN THE COMBUSTION OUTER CASE RUPTURED. METALLURGICAL EXAMINATION REVEALED THE RUPTURED CASE HAD A 1/2 INCH CRACK IN IT WHEN IT WENT THROUGH OVERHAUL 16 CYCLES BEFORE THE FAILURE. IT WAS FURTHER DETERMINED THAT THE NICKLE AND CADMIUM PLATING PLACED ON THE CASE AT OVERHAUL WAS NOT PROPER THICKNESS RESULTING IN CADMIUM EMBRITTLEMENT OF THE CASE BASE MATERIAL AND THEN THE CASE RUPTURE.
Full Narrative
FLT EXPERIENCED FAILURE OF THE NUMBER TWO ENGINE SHORTLY AFTER TAKEOFF WHEN THE COMBUSTION OUTER CASE RUPTURED. METALLURGICAL EXAMINATION REVEALED THE RUPTURED CASE HAD A 1/2 INCH CRACK IN IT WHEN IT WENT THROUGH OVERHAUL 16 CYCLES BEFORE THE FAILURE. IT WAS FURTHER DETERMINED THAT THE NICKLE AND CADMIUM PLATING PLACED ON THE CASE AT OVERHAUL WAS NOT PROPER THICKNESS RESULTING IN CADMIUM EMBRITTLEMENT OF THE CASE BASE MATERIAL AND THEN THE CASE RUPTURE.
Flight
Event TypeIncident
Event Time09:15 EDT
Nearest AirportMiami International (0nm N)
Runway27L
Runway Length13000 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing 737-222
Tail NumberN69AF
Aircraft CategoryAir
DamageMinor
OperatorPan American World Airways
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsP&W · JT8D-15A · Turbofan · 15500
Seats107
People & Injuries
Injury SummaryNo injuries (85 uninjured)
Fatal0
Serious0
Minor0
Uninjured85
Total85
Crew 1Age 55 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind360° @ 5 kt
Visibility7 sm
CeilingNone
Altimeter30.00 inHg
Observation Time12:50
Weather SourceWFAC