federal_register: 2019-24594

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document_number title type abstract publication_date pub_year pub_month html_url pdf_url agency_names agency_ids excerpts regulation_id_numbers
2019-24594 Airworthiness Directives; Rolls-Royce plc Turbofan Engines Proposed Rule The FAA is revising an earlier proposal for certain Rolls- Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 model turbofan engines. This action revises the notice of proposed rulemaking (NPRM) by modifying the inspection threshold for ultrasonic inspections (UIs) of the affected low-pressure (LP) compressor blades for both standard operations and non-standard operations (NSO). This action also revises the service information references. The FAA is proposing this airworthiness directive (AD) to address the unsafe condition on these products. Since these actions would impose an additional burden over those in the NPRM, the FAA is reopening the comment period to allow the public the chance to comment on these changes. 2019-11-15 2019 11 https://www.federalregister.gov/documents/2019/11/15/2019-24594/airworthiness-directives-rolls-royce-plc-turbofan-engines https://www.govinfo.gov/content/pkg/FR-2019-11-15/pdf/2019-24594.pdf Transportation Department; Federal Aviation Administration 492,159 The FAA is revising an earlier proposal for certain Rolls- Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 model turbofan engines. This action revises the notice of proposed rulemaking (NPRM) by modifying the inspection threshold for ultrasonic... 2120-AA64

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