Jan 23, 2017
Incident
Baltimore, MD
InjuriesNone
Phase of Flight-
ConditionsUnk
OperationFAR 121
Probable Cause
A Bombardier CRJ200 No. 2 engine failure due to the separation of a fan blade airfoil at a low cycle fatigue crack that originated at the forward fan blade pin hole attachment. The separated fan blade had previously undergone a hot form repair and both metallurgical analysis and repair records indicated that the lance/shot peen step required to restore sufficient residual stress levels to the blade material was not completed.
NTSB ENG17IA008