Mitsubishi MU-2B N999FA

Summary

On 20 July 1996 at about 15:57 local time, a Mitsubishi MU-2B registered N999FA, operated by D & D Aviation, was involved in an accident near Scottsdale, Arizona, United States. One person was on board and nobody was injured. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

20 July 1996 at 15:57

Classification

Accident

Location

Scottsdale, Arizona, United States

Nearest airport

Scottsdale Municipal (SDL)

Coordinates

33.6098, -111.8897

Aircraft

Mitsubishi MU-2B

Registration

N999FA

Category

Airplane

Engines

2

Operator

D & D Aviation

Operating rule

Part 91: General Aviation

Purpose of flight

Business

Phase of flight

Not recorded

Route

Unknown → Phoenix

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

LAX96LA280

Nobody was injured.

an uncontained failure of the second stage turbine wheel due to fatigue. Factors were: obstructions in the forced landing area and the inability of the airplane to climb after the turbine wheel failure.

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

Read the full NTSB narrative

The right engine lost power after an uncontained engine failure during the initial takeoff climb. The airplane would not climb and the pilot was forced to land. The pilot selected a street for a forced landing area. The pilot landed gear up while maneuvering to avoid hitting street light poles and automobiles. After touchdown, the airplane slid into a block wall. A fire erupted as a result of a postimpact fuel leak in the left wing. The airplane's engines were examined at the manufacturer's facilities. The right engine exhibited evidence of an uncontained separation of the second stage turbine rotor disk. Examination of the disk fragments revealed a low cycle fatigue fracture mode. The fatigue initiated from multiple areas at and adjacent to the inside diameter bore surface near the aft side of the disk. According to the engine manufacturer, the multiple indication areas were associated with uninspectable size porosity and the primary carbides in the cast material. There were no material or casting defects detected on any of the fractures through the wheel.

Quoted verbatim from the NTSB record.