# Proposed AD FAA-2020-0394: Honeywell International Inc. Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-18-09
- Products: Honeywell International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 4, 2020, 85 FR 26375
- Comments due: June 18, 2020
- Became: [AD 2020-18-09](https://openairdocs.org/ad/2020-18-09)
- Docket: FAA-2020-0394 (https://www.regulations.gov/docket/FAA-2020-0394, where comments are filed)
- Project: AD-2019-00141-E
- FR document: 2020-09287
- Official PDF: https://openairdocs.org/files/sha256/8f/6e/8f6efd78d4073770015a9ffdbb4dd72fd496219580b762d94f0125dc2ded7a63 (from https://www.govinfo.gov/content/pkg/FR-2020-05-04/pdf/2020-09287.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/05/04/2020-09287/airworthiness-directives-honeywell-international-inc-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BAD1918C91FCCB538625855E0047BA23.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0394

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Honeywell International Inc. ALF502L, ALF502L-2, ALF502L-2A, ALF502L-2C, ALF502L-3, ALF502R-3, ALF502R-3A, ALF502R-4, ALF502R-5, ALF502R-6, LF507-1F, and LF507-1H model turbofan engines. This proposed AD was prompted by a report of an engine experiencing an uncontained release of low-pressure turbine (LPT) blades. This proposed AD would require initial and repetitive visual inspections of the overspeed fuel solenoid valve assembly and the fuel filter outlet. Depending on the results of these inspections, the AD may require inspection of the adjacent fuel system tube assemblies as well as replacement or overhaul of the overspeed fuel solenoid valve assembly. This proposed AD would also require periodic overhaul of the overspeed fuel solenoid valve assembly. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 4, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-09287, comments due Jun 18, 2020 (https://www.federalregister.gov/documents/2020/05/04/2020-09287/airworthiness-directives-honeywell-international-inc-turbofan-engines)

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