Airworthiness Directive · Amendment 39-21936 · Turbine section
General Electric Company Turbofan Engines
This AD applies to General Electric Company (GE) Passport 20-17BB1A, Passport 20-18BB1A, and Passport 20-19BB1A model turbofan engines.
The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) Passport 20-17BB1A, Passport 20-18BB1A, and Passport 20-19BB1A model turbofan engines. This AD was prompted by a report of a manufacturing quality escape that requires a reduction to the life limit of certain high-pressure turbine (HPT) rotor stage 1 disks. This AD requires revising the airworthiness limitations section (ALS) of the existing maintenance manual and the operator's existing approved continuous airworthiness maintenance program (CAMP) to incorporate a reduced life limit for certain HPT rotor stage 1 disks. The FAA is issuing this AD to address the unsafe condition on these products.
Within 120 days after the effective date of this AD, revise the airworthiness limitations section of the existing maintenance manual for your engine and the operator's existing approved continuous airworthiness maintenance program by adding Figure 1 to paragraph (g) of this AD.
Note 1 to paragraph (g): Where Figure 1 to paragraph (g) refers to “Life Cycles,” for the purpose of this AD, this refers to life cycles since new.
