# Proposed AD FAA-2017-0103: Agusta S.p.A. Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-04-11
- Products: Agusta
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 22, 2017, 82 FR 44363
- Comments due: November 21, 2017
- Became: [AD 2018-04-11](https://openairdocs.org/ad/2018-04-11)
- Docket: FAA-2017-0103 (https://www.regulations.gov/docket/FAA-2017-0103, where comments are filed)
- FR document: 2017-19943
- Official PDF: https://openairdocs.org/files/sha256/b2/a1/b2a1a9476eb015a1951a702a88f7a00eb1b1ebbc76a6e76e496f8d5459687fad (from https://www.govinfo.gov/content/pkg/FR-2017-09-22/pdf/2017-19943.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/09/22/2017-19943/airworthiness-directives-agusta-spa-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C6E86F81C4B0A52B862581A3005A3BB3.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0103

## Summary

We propose to adopt a new airworthiness directive (AD) for Agusta S.p.A. Model AB139 and Model AW139 helicopters. This proposed AD would require inspecting the thickness of the tail gearbox (TGB) central housing (housing). This proposed AD is prompted by reports that the housing thickness does not conform to its type design. The actions of this proposed AD are intended to detect and correct an unsafe condition on these products.

## Notices in this docket

- Sep 22, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-19943, comments due Nov 21, 2017 (https://www.federalregister.gov/documents/2017/09/22/2017-19943/airworthiness-directives-agusta-spa-helicopters)

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