NONE · LEARJET · 2007-08-12 · Salt Lake City, UT, USA
Event
NTSB number
ENG07IA034
Event ID
20081219X65335
Type
Incident
Date
2007-08-12
Location
Salt Lake City, UT, USA
Coordinates
40.750682, -111.90065
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
2
Total aboard
2
Aircraft
Make
LEARJET
Model
—
Registration
N244F
FAR Part
091
Engines
2
Damage
—
Conditions
Light
—
Weather
—
Probable cause
The fatigue fracture of the fan blade due to the blade vendor's improper setup of the forging dies, which resulted in fan blades with airfoils that were below the minimum thickness in the highest stressed area of the airfoil and resulted in operating stresses that exceeded the material's capability. Contributing to the incident was the engine manufacturer's lack of a dimensional inspection of the fan blade's airfoil.