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Thu, Mar 08, 2007

AD: General Electric

AD NUMBER: 2007-05-16
MANUFACTURER: General Electric
SUBJECT: Airworthiness Directive 2007-05-16
SUMMARY: This action supersedes emergency airworthiness directive (AD) 2007-04-51 that was sent previously to all known U.S. owners and operators of GE CF34-3A1/-3B/-3B1 turbofan engines.

That action required a one-time visual and tactile inspection of certain areas of certain serial number (SN) fan disks for an arc-out defect, within 20 engine flight hours after the effective date of that AD.

This AD supersedes AD 2007-04-51 and adds eight SNs to the list of suspect fan disks. This AD results from GE discovering eight additional SNs of fan disks suspected of having an arc-out defect, and from the original report that a GE CF34-3B1 turbofan engine experienced an uncontained fan disk failure during flight operation.

We are issuing this AD to prevent an uncontained fan disk failure and airplane damage.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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