# Proposed AD FAA-2024-2417: General Electric Company Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-07-10
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 1, 2024, 89 FR 87317
- Comments due: December 16, 2024
- Became: [AD 2025-07-10](https://openairdocs.org/ad/2025-07-10)
- Docket: FAA-2024-2417 (https://www.regulations.gov/docket/FAA-2024-2417, where comments are filed)
- Project: AD-2024-00336-E
- FR document: 2024-25377
- Official PDF: https://openairdocs.org/files/sha256/87/99/879939fc43e9135b6898700fd5985f619288ac9f77ca08de4c3fdfb2c79030f8 (from https://www.govinfo.gov/content/pkg/FR-2024-11-01/pdf/2024-25377.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/11/01/2024-25377/airworthiness-directives-general-electric-company-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-25377-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2417

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2020-20-17 and AD 2021-15-05, which apply to all General Electric Company (GE) Model GE90-110B1 and GE90-115B engines. AD 2020-20-17 prohibits dispatch of an airplane if certain status messages are displayed on the engine indicating and crew alerting system (EICAS) and if certain conditions are present; and as terminating action, requires revision of the existing FAA-approved minimum equipment list (MEL) by incorporating the dispatch restrictions into the MEL. AD 2021-15-05 requires initial and repetitive replacement of the full authority digital engine control (FADEC) integrated circuit (MN4) microprocessor. Since the FAA issued AD 2020-20-17 and AD 2021-15-05, the manufacturer has developed a software revision for the electronic engine control (EEC) FADEC that further mitigates the unsafe condition. This proposed AD would retain all the actions of AD 2020-20-17 and AD 2021-15-05, and it would also require upgrading the EEC FADEC software to an EEC FADEC software version eligible for installation as a terminating action. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 1, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-25377, comments due Dec 16, 2024 (https://www.federalregister.gov/documents/2024/11/01/2024-25377/airworthiness-directives-general-electric-company-engines)

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