# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2021-02-23 · Effective 2021-03-30 · 86 FR 10780
## Document
- **Document number:** 2021-03592
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 10780
- **Publication date:** 2021-02-23
- **Effective date:** 2021-03-30
- **FAA docket:** Docket No. FAA-2020-0331
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This AD was prompted by a report that the necessary sealant was not applied to the side of body (SOB) slot as a result of a production drawing that provided unclear SOB slot sealant application instructions. This AD requires a general visual inspection for insufficient sealant in the SOB slot, and related investigative and corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/02/23/2021-03592/airworthiness-directives-the-boeing-company-airplanes)
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