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NTSB Report
May 12, 1984 · Boeing 747 · FBPVS
Los Angeles, CA
Overview
Report Status
Preliminary report
Event Type
Incident
Date
May 12, 1984
Injury Outcomes
No injuries (1 uninjured)
Location
Los Angeles, CA
Aircraft
Boeing 747
Tail Number
FBPVS
Injuries
None
Aircraft Damage
Minor
NTSB Number
DCA84IA026
DURING ROTATION THE #2 ENG SUSTAINED AN EXPLOSIVE RUPTURE OF ITS COMPRESSOR REAR FRAME(CRF). THE CREW OBSERVED A RAPID DROP IN THE #2 ENG PERFORMANCE PARAMETERS & THE ILLUMINATION OF THE #2 ENG THRUST REVERSERS 'UNLOCK AND IN TRANSIT' LITES. THE CREW DISCHARGED A FIRE BOTTLE. AFTER THE ENG WAS SHUT DOWN & THE FUEL DUMPED, THE CREW LANDED THE ACFT WITHOUT FURTHER INCIDENT. THE ENG DAMAGE WAS PRIMARILY CONFINED TO AN AXIALLY RUPTURED OUTER CASING OF THE CRF. THE CRF HAD FRACTURED AS A RESULT OF A HIGH-STRESS(LOW-CYCLE) FATIGUE. THE FATIGUE ORIGINATED AT A ZONE OF MICROPOROSITY IN THE IGNITOR PAD AREA OF THE CRF OUTER CASING. TOTAL NUMBER OF CREW & PASSENGERS NOT REPORTED.
Full Narrative
DURING ROTATION THE #2 ENG SUSTAINED AN EXPLOSIVE RUPTURE OF ITS COMPRESSOR REAR FRAME(CRF). THE CREW OBSERVED A RAPID DROP IN THE #2 ENG PERFORMANCE PARAMETERS & THE ILLUMINATION OF THE #2 ENG THRUST REVERSERS 'UNLOCK AND IN TRANSIT' LITES. THE CREW DISCHARGED A FIRE BOTTLE. AFTER THE ENG WAS SHUT DOWN & THE FUEL DUMPED, THE CREW LANDED THE ACFT WITHOUT FURTHER INCIDENT. THE ENG DAMAGE WAS PRIMARILY CONFINED TO AN AXIALLY RUPTURED OUTER CASING OF THE CRF. THE CRF HAD FRACTURED AS A RESULT OF A HIGH-STRESS(LOW-CYCLE) FATIGUE. THE FATIGUE ORIGINATED AT A ZONE OF MICROPOROSITY IN THE IGNITOR PAD AREA OF THE CRF OUTER CASING. TOTAL NUMBER OF CREW & PASSENGERS NOT REPORTED.
Flight
Event TypeIncident
Event Time21:56 PDT
Nearest AirportLos Angeles Intl (0nm N)
Runway0
Flight Plan FiledIFR
Aircraft FireIflt
Aircraft ExplosionIflt
Aircraft
AircraftBoeing 747
Tail NumberFBPVS
Aircraft CategoryAir
DamageMinor
Operating RulePart 129
Engines4
Engine TypeTurbofan
Engine DetailsGe · CF6-50 · Turbofan · 47000
Seats396
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Unknown
Conditions
ConditionsUnknown
LightDark Night
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0