# Proposed AD FAA-2016-6744: Rolls-Royce plc Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-25-10
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 26, 2016, 81 FR 48724
- Comments due: September 26, 2016
- Became: [AD 2016-25-10](https://openairdocs.org/ad/2016-25-10)
- Docket: FAA-2016-6744 (https://www.regulations.gov/docket/FAA-2016-6744, where comments are filed)
- Project: 2016-NE-12-AD
- FR document: 2016-17160
- Official PDF: https://openairdocs.org/files/sha256/28/c8/28c81f48b09e40e5afd1c4db6526fce7b3a694b64c35bd8dc90b1296c4e999ef (from https://www.govinfo.gov/content/pkg/FR-2016-07-26/pdf/2016-17160.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/07/26/2016-17160/airworthiness-directives-rolls-royce-plc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6A67E57346DFEED886257FFC0049D7B4.0001
- Page: https://openairdocs.org/proposed/FAA-2016-6744

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Rolls-Royce plc (RR) 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 turbofan engines that have not incorporated RR modification 72-J195 in production or RR Service Bulletin (SB) RB.211-72-J195. This proposed AD was prompted by inspection of RR Trent 800 engines returned from service that revealed flame erosion and axial cracking on the aft face of the stage 3 disk rim of the high-pressure compressor (HPC) stage 1-4 rotor disks shaft. This proposed AD would require machining the HPC stage 3 inner shroud, inspecting the HPC stage 1-4 rotor disks shaft, and replacing the HPC stage 1-4 rotor disks shaft if found defective. We are proposing this AD to prevent uncontained failure of the HPC stage 1-4 rotor disks shaft, damage to the engine, and damage to the airplane.

## Notices in this docket

- Jul 26, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-17160, comments due Sep 26, 2016 (https://www.federalregister.gov/documents/2016/07/26/2016-17160/airworthiness-directives-rolls-royce-plc-turbofan-engines)

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