# Proposed AD FAA-2024-0236: Leonardo S.p.a. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-10-08
- Products: Leonardo
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 27, 2024, 89 FR 14417
- Comments due: April 12, 2024
- Became: [AD 2024-10-08](https://openairdocs.org/ad/2024-10-08)
- Docket: FAA-2024-0236 (https://www.regulations.gov/docket/FAA-2024-0236, where comments are filed)
- Project: MCAI-2022-00066-R
- FR document: 2024-03976
- Official PDF: https://openairdocs.org/files/sha256/5f/1b/5f1b6b5d020d7089e2a0220b7d3d276cbd6b75cddbd039b3c7be55c6c80ce025 (from https://www.govinfo.gov/content/pkg/FR-2024-02-27/pdf/2024-03976.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/02/27/2024-03976/airworthiness-directives-leonardo-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-03976-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-0236

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Leonardo S.p.a. Model AW189 helicopters. This proposed AD was prompted by a report of abnormal oscillatory behavior during automated glide slope approaches, due to sealant on the glide slope (G/S) antenna coaxial connectors. This proposed AD would require visually inspecting certain G/S antennas and G/S antenna coaxial connectors for the presence of any sealant; cleaning parts and removing any sealant; performing an external G/S acceptance test procedure (ATP); and taking corrective actions if necessary. This proposed AD would also prohibit installing certain G/S antennas and G/S antenna coaxial connecters. These actions are specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Feb 27, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-03976, comments due Apr 12, 2024 (https://www.federalregister.gov/documents/2024/02/27/2024-03976/airworthiness-directives-leonardo-spa-helicopters)

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