✈️New Airworthiness Directive for CFM Engines by FAA
Airworthiness Directives; CFM International, S.A. Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) Model LEAP-1A and LEAP-1C engines. This AD was prompted by an investigation of an in-flight shut down event that revealed the aft arm of the high-pressure turbine (HPT) rotor interstage seal had failed. This AD requires removal from service and replacement of the HPT rotor interstage seal for LEAP-1A engines. Since the HPT rotor interstage seal part number is interchangeable between LEAP-1A and LEAP-1C engines, this AD also prohibits installation of these affected parts onto any LEAP-1A or LEAP-1C engine. The FAA is issuing this AD to address the unsafe condition on these products.
Agencies
- Transportation Department
- Federal Aviation Administration
Business Impact
$$ - Med
This regulation introduces a new airworthiness directive affecting CFM International, S.A. engines, requiring compliance actions such as the replacement of the HPT rotor interstage seal. The costs of compliance are significant, estimated at over $10 million for U.S. operators, directly impacting financial resources and operational efficiency for affected businesses.