The AD applies to all 737s using that same engine: https://www.federalregister.gov/documents/2023/08/10/2023-17197/airworthiness-directives-the-boeing-company-a

The AD applies to all 737s using that same engine: https://www.federalregister.gov/documents/2023/08/10/2023-17197/airworthiness-directives-the-boeing-company-airplanes https://www.federalregister.gov/documents/2023/08/10/2023-17... However, the MAX 8 and MAX 9 had already been certified and delivered before this AD was published, while the MAX 7 had delays in certification.