# Proposed AD FAA-2021-0831: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-03-16
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 28, 2021, 86 FR 59667
- Comments due: December 13, 2021
- Became: [AD 2022-03-16](https://openairdocs.org/ad/2022-03-16)
- Docket: FAA-2021-0831 (https://www.regulations.gov/docket/FAA-2021-0831, where comments are filed)
- Project: AD-2021-00712-E
- FR document: 2021-23237
- Official PDF: https://openairdocs.org/files/sha256/44/88/44881dc15af49b1a0654922038f8eb601df472b1189e069901865b4a13e38d23 (from https://www.govinfo.gov/content/pkg/FR-2021-10-28/pdf/2021-23237.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/10/28/2021-23237/airworthiness-directives-general-electric-company-turbofan-engines
- Page: https://openairdocs.org/proposed/FAA-2021-0831

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-1B and GEnx-2B model turbofan engines. This proposed AD was prompted by the manufacturer's report of two findings of sheared compressor discharge pressure (CDP) bolts during engine shop visits. This proposed AD would require initial and repetitive inspections of the CDP bolted joint and, depending on the findings, a piece part inspection of the stages 6-10 compressor rotor spool, CDP seal, and high-pressure turbine (HPT) rotor stage 1 disk. As a terminating action, this proposed AD would require operators to reassemble the CDP bolted joint using a specific torque wrench. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 28, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-23237, comments due Dec 13, 2021 (https://www.federalregister.gov/documents/2021/10/28/2021-23237/airworthiness-directives-general-electric-company-turbofan-engines)

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