# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2012-02-29 · Effective 2012-04-04 · 77 FR 12170
## Document
- **Document number:** 2012-4429
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 12170
- **Publication date:** 2012-02-29
- **Effective date:** 2012-04-04
- **FAA docket:** Docket No. FAA-2010-0030
## Abstract

We are adopting a new airworthiness directive (AD) for all Model 757 airplanes. This AD was prompted reports that several operators have found cracking in the front spar lower chord at the fastener locations common to the side link support fitting at wing station (WS) 292. This AD requires repetitive inspections for corrosion and cracking in this area, and corrective actions if necessary. We are issuing this AD to detect and correct such corrosion and cracking, which, if not corrected, could grow and result in structural failure of the spar.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/02/29/2012-4429/airworthiness-directives-the-boeing-company-airplanes)
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