# Proposed AD FAA-2021-0665: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-25-05
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 24, 2021, 86 FR 47260
- Comments due: October 8, 2021
- Became: [AD 2021-25-05](https://openairdocs.org/ad/2021-25-05)
- Docket: FAA-2021-0665 (https://www.regulations.gov/docket/FAA-2021-0665, where comments are filed)
- Project: AD-2021-00270-T
- FR document: 2021-18068
- Official PDF: https://openairdocs.org/files/sha256/29/05/2905b06018aefc832da5f23269f096cd8986da93ed9e167156691fcf8eb8ae19 (from https://www.govinfo.gov/content/pkg/FR-2021-08-24/pdf/2021-18068.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/08/24/2021-18068/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5012D4D5A12CFAEB8625873C004C493A.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0665

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2017-23-02, which applies to certain The Boeing Company Model 737-200, -200C, -300, -400, and -500 series airplanes. AD 2017-23-02 requires

((Page 47261))

repetitive inspections, replacement, and applicable on-condition actions for certain fuselage crown skin panels. Since the FAA issued AD 2017-23-02, certain airplane configurations and inspection locations have been revised and additional airplanes have been determined to be subject to the unsafe condition. This proposed AD would retain the actions in AD 2017-23-02, revise certain airplane configurations and inspection locations, and add airplanes to the applicability. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 24, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-18068, comments due Oct 8, 2021 (https://www.federalregister.gov/documents/2021/08/24/2021-18068/airworthiness-directives-the-boeing-company-airplanes)

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