federal_register: 2013-27633
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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 |
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| 2013-27633 | Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Formerly Rolls-Royce Deutschland GmbH, Formerly BMW Rolls-Royce GmbH) Turbofan Engines | Proposed Rule | We propose to supersede existing airworthiness directive (AD) 2012-26-14 that applies to all Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines. AD 2012-26-14 currently requires removal from service of the high-pressure (HP) compressor stages 1 to 6 rotor disc assembly before exceeding certain thresholds. Since we issued AD 2012-26-14, RRD developed a new silver-free nut that, if installed with a new HP compressor stages 1 to 6 disc assembly, would correct the unsafe condition identified in AD 2012-26-14. Therefore, we propose to supersede AD 2012-26-14 to restrict the applicability to engines exposed to silver plated nuts. Additionally, we are removing the terminating action statement from AD 2012-26-14 based on a comment received. This proposed AD would require removal from service of certain HP compressor stages 1 to 6 rotor disc assemblies before exceeding certain thresholds. We are proposing this AD to prevent failure of the HP compressor stages 1 to 6 rotor disc assembly, which could lead to an uncontained engine failure and damage to the airplane. | 2013-11-19 | 2013 | 11 | https://www.federalregister.gov/documents/2013/11/19/2013-27633/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-formerly-rolls-royce-deutschland-gmbh | https://www.govinfo.gov/content/pkg/FR-2013-11-19/pdf/2013-27633.pdf | Transportation Department; Federal Aviation Administration | 492,159 | We propose to supersede existing airworthiness directive (AD) 2012-26-14 that applies to all Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines. AD 2012-26-14 currently requires removal from... |