NTSB Identification: NYC84IA200.
The docket is stored on NTSB microfiche number 26559.
Incident occurred Tuesday, June 05, 1984 in PHILADELPHIA, PA
Aircraft: BOEING 720-025, registration: N8711E
Injuries: 95 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

WHILE CLIMBING THRU 600 FT AFTER TAKEOFF, THE CREW HEARD A LOUD BANG, THE ACFT SHUTTERED & THE #3 ENG FIRE WARNING LIGHT ILLUMINATED. A FIRE BOTTLE WAS DISCHARGED. THE COPLT SAW FLAMES COMING FROM THE ENG & THE FIRE WARNING LIGHT REMAINED ILLUMINATED, SO A 2ND FIRE BOTTLE WAS DISCHARGED. THE AIRCREW RETURNED TO THE ARPT & LANDED WITHOUT FURTHER INCIDENT. EMERGENCY EQUIPMENT WAS STANDING BY & THE PASSENGERS DEPLANED NORMALLY. AN EXAM OF THE ENG REVEALED THAT THE 7TH STAGE TURBINE ASSEMBLY HAD FAILED, PENETRATING THE RIGHT SIDE OF THE CASE. THE 6TH & 8TH STAGES WERE DAMAGED BY THE DISPLACED 7TH STAGE ASSEMBLY. FUEL LINES & THE FIRE WARNING SYSTEM WERE ALSO DAMAGED.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

TURBINE ASSEMBLY..FAILURE,TOTAL


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