NYC84IA200

NTSB incident investigation · Boeing 720-025 · Philadelphia, PA · June 5, 1984

Incident · No injuriesIncident investigationFinal report
Date
June 5, 1984, 13:12 local (17:12 UTC)
Place
Philadelphia, PA
Injuries
95 uninjured
Damage
No damage
Phase of flight
Initial climb
Aircraft
N8711EBoeing 720-025
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19840605076219I
Case key
35444

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

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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.

Loss of engine power(partial) - mech failure/malfTakeoff - initial climb
Turbine assembly - failure,totalCause
Emergency procedure - performedPilot in command
Fuel system,line - overload
FireTakeoff - initial climb

Analysis

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.

Aircraft

Registration
N8711E
Reported as
Boeing 720-025
Category
Airplane
Serial number
18240
Airframe hours
29,560
Engine
P&W JT3C-7, 12,000 lbs thrust, turbo fan
Damage
No damage
Fire
In-Flight
Flight
Part 91
Registered owner
Windwalkers Air Country Club,
Airworthiness certificate
Standard, Normal
Departed
PHL · Philadelphia, PA
Destination
LAX · Los Angeles, CA
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
61
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Invalid Medical for flight
Seat
Left
Flight hours
30,000 total · 6,000 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F
Altimeter
30.00 inHg
Observed at
PHL

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N8711E · 1

Matched to the same aircraft by N-number and date.