# Proposed AD FAA-2020-1021: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-03-09
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 27, 2020, 85 FR 75969
- Comments due: January 11, 2021
- Became: [AD 2021-03-09](https://openairdocs.org/ad/2021-03-09)
- Docket: FAA-2020-1021 (https://www.regulations.gov/docket/FAA-2020-1021, where comments are filed)
- Project: AD-2020-00847-T
- FR document: 2020-25614
- Official PDF: https://openairdocs.org/files/sha256/20/27/202706d5a2f67aa1a9fce21e3e60463c34c817f44c4672ca8f88926391754126 (from https://www.govinfo.gov/content/pkg/FR-2020-11-27/pdf/2020-25614.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/11/27/2020-25614/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BB74F5BA12D69EFF8625862D0056ED75.0001
- Page: https://openairdocs.org/proposed/FAA-2020-1021

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all The Boeing Company Model 727 series airplanes. This proposed AD was prompted by a determination that excessive sealant coating on internal wing Structural Significant Items (SSIs) may not reveal cracks during inspections required by AD 98-11-03 R1. This proposed AD would require revising the existing maintenance or inspection program, as applicable, to incorporate inspections that will give no less than the required damage tolerance rating (DTR) for certain SSIs of the wing. This proposed AD would also require repetitive inspections for cracking of the affected SSIs and repair if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 27, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-25614, comments due Jan 11, 2021 (https://www.federalregister.gov/documents/2020/11/27/2020-25614/airworthiness-directives-the-boeing-company-airplanes)

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