Airworthiness Directive · Amendment 39-22987 · Engine
General Electric Company Engines
This AD applies to General Electric Company (GE) Model CT7-2E1 engines.
The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) Model CT7-2E1 engines. This AD was prompted by a revised analysis using an updated stress model, which calculated that the actual life limit of the CT7-2E1 stage 2 turbine aft cooling plate is less than the current life limit. This AD requires revision of the airworthiness limitations section (ALS) of the existing CT7-2E1 engine maintenance manual (EMM) and the operator's existing approved maintenance program or inspection program, as applicable, to incorporate a reduced life limit for this part. The FAA is issuing this AD to address the unsafe condition on these products.
Within 30 days after the effective date of this AD, revise the airworthiness limitations section of the existing engine maintenance manual or instructions for continued airworthiness, and the operator's existing approved maintenance program or inspection program, as applicable, by replacing the 6,100 cycle life limit with the new life limit of 3,100 cycles for the stage 2 aft turbine cooling plate part number 5166T27P01.
After the action required by paragraph (g) of this AD has been done, no alternative actions, including life limits, are allowed unless they are approved as specified in the provisions of paragraph (i) of this AD.
