# Proposed AD FAA-2017-0473: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-25-10
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 18, 2017, 82 FR 22763
- Comments due: July 3, 2017
- Became: [AD 2017-25-10](https://openairdocs.org/ad/2017-25-10)
- Docket: FAA-2017-0473 (https://www.regulations.gov/docket/FAA-2017-0473, where comments are filed)
- Project: 2016-NM-195-AD
- FR document: 2017-10031
- Official PDF: https://openairdocs.org/files/sha256/15/37/153773f7b08bf4e602ac24a5eb6ab7be862a76b72c4f636583ba42db0bd24b4f (from https://www.govinfo.gov/content/pkg/FR-2017-05-18/pdf/2017-10031.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/05/18/2017-10031/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/77D3CA91F00DA689862581240048BB40.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0473

## Summary

We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This proposed AD was prompted by a report indicating that wear of the bearing plate slider bushings could cause disconnection of certain elevator hinges, which could excite the horizontal stabilizer under certain in-flight speed/altitude conditions and lead to degradation of the structure. This proposed AD would require repetitive inspections and checks of certain elevator hinges and related components, repetitive replacements and tests of the bearing plate, and related investigative and corrective actions if necessary. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 18, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-10031, comments due Jul 3, 2017 (https://www.federalregister.gov/documents/2017/05/18/2017-10031/airworthiness-directives-the-boeing-company-airplanes)

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