NONE · MCDONNELL DOUGLAS DC10 · 2006-04-04 · Memphis, TN, USA
Event
NTSB number
DCA06FA033
Event ID
20060504X00511
Type
Accident
Date
2006-04-04
Location
Memphis, TN, USA
Coordinates
35.14994, -90.049392
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
3
Total aboard
3
Aircraft
Make
MCDONNELL DOUGLAS
Model
DC10
Registration
N386FE
FAR Part
121
Engines
3
Damage
SUBS
Conditions
Light
DAYL
Weather
VMC
Probable cause
The rupture of a fatigue crack in the forward air seal tooth serration of the No. 3 engine low pressure turbine stage 1 disk that initiated due to an improper weld repair performed during original manufacture. The improper weld repair changed the material properties of the disk near the weld feature, resulting in an accelerated crack propagation rate that allowed the crack to grow to rupture before the next inspection interval. Contributing to the severity of the accident was the inability of the flight crew to shutdown the engine as a result of the damage caused by a liberated piece of the low pressure turbine stage 1 disk when it punctured the right wing.