NONE · BOEING 737 · 2008-06-27 · Phoenix (PHX), AZ, USA
Event
NTSB number
ENG08IA051
Event ID
20100608X35931
Type
Incident
Date
2008-06-27
Location
Phoenix (PHX), AZ, USA
Coordinates
33.434444, -112.01139
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
0
Total aboard
0
Aircraft
Make
BOEING
Model
737
Registration
N514AU
FAR Part
121
Engines
2
Damage
MINR
Conditions
Light
—
Weather
—
Probable cause
The failure of the MLG was due to cracking in the cylinder wall resulting from a fatigue mechanism which initiated at, and near the inner diameter (ID) surface, with propagation through the wall toward the outer diameter(OD) surface. Crack initiation was due to base metal damage which took the form of over tempered martensite (OTM) and chemical attack/pitting of the base metal.