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Mon, Sep 16, 2013

AD: General Electric Company Turbofan Engines

AD NUMBER: 2013-17-07

PRODUCT: Certain General Electric Company (GE) GE90-76B, -85B, -90B, -94B, -110B1, and -115B turbofan engines.
SUBJECT: Airworthiness Directive 2013-17-07
ACTION: Final Rule

SUMMARY: This AD was prompted by multiple reports of distress of certain stage 1 high-pressure turbine (HPT) stator shrouds due to accelerated corrosion and oxidation, including one engine in-flight shutdown (IFSD) caused by failure of the HPT stator shrouds.

This AD requires initial and repetitive on-wing 360-degree borescope inspections (BSIs) for corrosion and oxidation of stage 1 HPT stator shrouds. If a shroud is found to be distressed, this AD requires reinspection at a reduced interval or removal from service before further flight.

The FAA is issuing this AD to prevent failure of stage 1 HPT stator shrouds, resulting in an IFSD of one or more engines, loss of thrust control, and damage to the airplane.

DATES: This AD is effective October 18, 2013.

FMI: AD

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