Boeing 747-121 N613FF

Summary

On 23 October 1995 at about 07:50 local time, a Boeing 747-121 registered N613FF was involved in an accident near Miami, Florida, United States. 5 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

23 October 1995 at 07:50

Classification

Accident

Location

Miami, Florida, United States

Nearest airport

Miami International (MIA)

Coordinates

Not recorded

Aircraft

Boeing 747-121

Registration

N613FF

Category

Airplane

Engines

4

Operator

Not recorded

Operating rule

Part 121: Air Carrier

Phase of flight

Not recorded

Route

Unknown → Port of Spain

Aircraft damage

Substantial

Weather

VMC

Light

Night/Dark

NTSB number

MIA96FA013

Nobody was injured.

failure of the No. 4 engine fifth stage turbine hub due to a cyclic stress rupture for undetermined reasons, which resulted in an uncontained failure of the engine.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The flight had an uncontained failure of the No. 4 engine during the takeoff roll. The takeoff was rejected and the aircraft stopped on the remaining runway. Airport emergency personnel extinguished a fire that erupted in the engine after failure. Examination of the aircraft showed the engine, pylon, right wing, flaps, and aileron, right horizontal stabilizer, and fuselage sustained damage from engine debris released during failure of the engine. Examination of the engine indicated the low pressure turbine fifth stage hub had ruptured. About 180 degrees of the hub rim had separated along with the blade attachment slots and blades. The hub ruptured from an area of a well oxidized, intergranular fracture that originated at a tierod hole. There was no apparent defect observed along the edge of the tierod hole that would cause a crack to initiate and propagate to critical length.

Quoted verbatim from the NTSB record.