# AD 2017-08-11: Engine - Type: Airworthiness directive - Status: Current - Products: Rolls-Royce RB211-Trent 875-17, RB211-Trent 877-17, RB211-Trent 884-17, RB211-Trent 884B-17, RB211-Trent 892-17, RB211-Trent 892B-17 and RB211-Trent 895-17 - Effective: May 30, 2017 - Published: April 24, 2017, 82 FR 18843–18845 - Issued: April 13, 2017 - Issued as: Final rule - Supersedes: [AD 2012-04-01](https://openairdocs.org/ad/2012-04-01) - Superseded by: Nothing supersedes this AD - Product type: Engine - ATA chapter: 72 · Engine - Amendment: 39-18860 - Docket: FAA-2010-0755 (https://www.regulations.gov/docket/FAA-2010-0755) - Project: 2010-NE-12-AD - Registered aircraft: 182 may be affected, by airframe or engine model (OpenAirDocs) - Official PDF: https://openairdocs.org/files/sha256/11/5e/115e1fc59cab0d9cd96353f5ea5419914d914a31800a9b001723429f98598459 (from https://www.govinfo.gov/content/pkg/FR-2017-04-24/pdf/2017-07984.pdf) - Federal Register: https://www.federalregister.gov/documents/2017/04/24/2017-07984/airworthiness-directives-rolls-royce-plc-turbofan-engines - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/669220982C0A6D0B8625810C005B94F5.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/2017-08-11 ## Summary We are superseding airworthiness directive (AD) 2012-04-01 for all Rolls-Royce plc (RR) RB211-Trent 800 model turbofan engines. AD 2012-04-01 required removal from service of certain critical engine rotating parts based on reduced life limits. This AD makes additional revisions to the life limits of certain critical engine rotating parts. This AD was prompted by RR further revising the life limits of certain critical engine rotating parts. We are issuing this AD to correct the unsafe condition on these products. ## The airworthiness directive 1. The authority citation for part 39 continues to read as follows: 2. The FAA amends § 39.13 by removing airworthiness directive (AD) 2012-04-01, Amendment 39-16956 (77 FR 10355, February 22, 2012) and adding the following AD: 2017-08-11 Rolls-Royce plc: Amendment 39-18860; Docket No. FAA-2010-0755; Directorate Identifier 2010-NE-12-AD. ### (a) Effective Date This AD is effective May 30, 2017. ### (b) Affected ADs This AD replaces AD 2012-04-01, Amendment 39-16956 (77 FR 10355, February 22, 2012). ### (c) Applicability This AD applies to all Rolls-Royce plc (RR) RR RB211-Trent 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17, and 895-17 turbofan engines. ### (d) Subject Joint Aircraft System Component (JASC) Code 7200, Engine (Turbine/Turboprop). ### (e) Unsafe Condition This AD was prompted by RR revising the life limits of certain critical engine rotating parts. We are issuing this AD to prevent the failure of critical engine rotating parts, damage to the engine, and damage to the airplane. ### (f) Compliance Comply with this AD within the compliance times specified, unless already done. (1) After the effective date of this AD, remove from service the parts listed in Table 1 to paragraph (f) of this AD before exceeding the new life limit indicated: *Table 1 to Paragraph ( f)—Reduced Part Lives* | Part nomenclature | Part No. | Life in standard duty cycles | Life in cycles using the HEAVY profile | | --- | --- | --- | --- | | Intermediate Pressure (IP) Compressor Rotor Shaft | FK24100 | 12,500 | 11,500 | | IP Compressor Rotor Shaft | FK24496 | 8,860 | 8,180 | | High-Pressure Compressor (HPC) Stage 1 to 4 Rotor Discs Shaft | FK24009 | 4,560 | 4,460 | | HPC Stage 1 to 4 Rotor Discs Shaft | FK26167 | 5,580 | 5,280 | | HPC Stage 1 to 4 Rotor Discs Shaft | FK32580 | 5,580 | 5,280 | | HPC Stage 1 to 4 Rotor Discs Shaft | FW11590 | 8,550 | 6,850 | | HPC Stage 1 to 4 Rotor Discs Shaft | FW61622 | 8,550 | 6,850 | | HPC Stage 5 and 6 Discs and Cone | FK25230 | 5,000 | 5,000 | | HPC Stage 5 and 6 Discs and Cone | FK27899 | 5,000 | 5,000 | | IP Turbine Rotor Disc | FK21117 | 11,610 | 10,400 | | IP Turbine Rotor Disc | FK33083 | 0 | 0 | (2) Reserved. ### (g) Installation Prohibition After the effective date of this AD, do not install any IP turbine discs, P/N FK33083, into any engine. ### (h) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. You may email your request to: ANE-AD-AMOC@faa.gov. ### (i) Related Information (1) For more information about this AD, contact Robert Green, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7754; fax: 781-238-7199; email: robert.green@faa.gov. (2) Refer to MCAI European Aviation Safety Agency, AD 2016-0223, dated November 8, 2016, for more information. You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2010-0755. ### (j) Material Incorporated by Reference None. ## Rule preamble ### Dates This AD is effective May 30, 2017. ### Addresses See the FOR FURTHER INFORMATION CONTACT section. ### For further information contact Robert Green, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7754; fax: 781-238-7199; email: robert.green@faa.gov. ### Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2012-04-01, Amendment 39-16956 (77 FR 10355, February 22, 2012), (“AD 2012-04-01”). AD 2012-04-01 applied to the specified products. The NPRM published in the Federal Register on January 18, 2017 (82 FR 5454). The NPRM proposed to continue to require removal from service of certain critical engine rotating parts based on reduced life limits. ### Comments We gave the public the opportunity to participate in developing this AD. We considered the comments received. The Boeing Company and American Airlines support the NPRM as written. ### Conclusion We reviewed the available data, including the comments received, and determined that air safety and the public interest require adopting this AD as proposed. ### Costs of Compliance We estimate that this AD affects 16 engines installed on airplanes of U.S. registry. We estimate the following costs to comply with this AD: *Estimated Costs* | Action | Labor cost | Parts cost | Cost per product | Cost on U.S. operators | | --- | --- | --- | --- | --- | | Replacement of critical engine rotating parts | 0 work-hours × $85 per hour = $0 | $45,000 (pro-rated cost of parts) | $45,000 | $720,000 | ### Authority for This Rulemaking Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency's authority. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, “General requirements.” Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. ### Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a “significant regulatory action” under Executive Order 12866, (2) Is not a “significant rule” under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction, and (4) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. ### Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E00050EN](https://openairdocs.org/tcds/E00050EN): Rolls-Royce Deutschland Ltd & Co KG; names 7 of 7 models: RB211-Trent 875-17, RB211-Trent 884B-17, RB211-Trent 877-17, RB211-Trent 892B-17, RB211-Trent 892-17, RB211-Trent 895-17, RB211-Trent 884-17 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 182 (0 by airframe model, 182 by engine model) - Makers: Boeing 181, Airbus 1 Models with the most aircraft: - [Rolls-Royce RB-211 series](https://openairdocs.org/engine/rolls-royce-rb-211-series): 182 aircraft (engine model) All 1 models: https://openairdocs.org/ad/2017-08-11/models.md Every aircraft: https://openairdocs.org/ad/2017-08-11/aircraft.md ## Related documents - [AD 2012-04-01](https://openairdocs.org/ad/2012-04-01) (historical): Critical engine parts · Rolls-Royce RB211-Trent 875-17, RB211-Trent 877-17, RB211-Trent 884-17 and 4 more. Effective Mar 28, 2012. Replaced by this AD No proposed rule in this release led to it. Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.