Mar 29, 2009
Incident
Minor Abilene, TX
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The formation and propagation of a fatigue crack in the trailing edge of the main rotor blade due to interconnected porosity and resultant corrosion. The area of interconnected porosity was due to a manufacturing defect which was not detected during the manufacturing process.
NTSB CEN09IA234