# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2013-04-15 · Effective 2013-05-20 · 78 FR 22182
## Document
- **Document number:** 2013-08193
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 22182
- **Publication date:** 2013-04-15
- **Effective date:** 2013-05-20
- **FAA docket:** Docket No. FAA-2012-0933
## Abstract

We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This AD was prompted by reports of an incorrect procedure used to apply the wear and corrosion protective surface coating to attach pins of the horizontal stabilizer rear spar. This AD requires inspecting to determine the part number of the attach pins of the horizontal stabilizer rear spar, and replacing certain attach pins with new, improved attach pins. We are issuing this AD to prevent premature failure of the attach pins, which could cause reduced structural integrity of the horizontal stabilizer to fuselage attachment, resulting in loss of control of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/04/15/2013-08193/airworthiness-directives-the-boeing-company-airplanes)
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