# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2021-11-08 · Effective 2021-12-13 · 86 FR 61679
## Document
- **Document number:** 2021-24225
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 61679
- **Publication date:** 2021-11-08
- **Effective date:** 2021-12-13
- **FAA docket:** Docket No. FAA-2021-0503
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2005-05- 18, which applied to certain The Boeing Company Model 737-600, -700, - 700C, -800, and -900 series airplanes. AD 2005-05-18 required repetitive inspections for cracking of the webs of the aft pressure bulkhead at a certain body station, and corrective action if necessary. This AD was prompted by cracking found in that inspection area on airplanes not identified in the applicability of AD 2005-05-18. This AD retains the requirements of AD 2005-05-18, revises the applicability to include additional airplanes, and adds an inspection for existing repairs on the newly added airplanes. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/11/08/2021-24225/airworthiness-directives-the-boeing-company-airplanes)
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