# Airworthiness Directives; Boeing Model 737-100, -200, -200C, -300, -400, and -500 Series Airplanes
> **Rule** · Final rule. · Published 2005-09-27 · Effective 2005-11-01 · 70 FR 56361
## Document
- **Document number:** 05-19143
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 56361
- **Publication date:** 2005-09-27
- **Effective date:** 2005-11-01
- **FAA docket:** Docket No. FAA-2005-18788
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD requires repetitive inspections of the intercostal webs, attachment clips, and stringer splice channels for cracks; and corrective action if necessary. This AD is prompted by reports of fatigue cracks on several Boeing Model 737-200 series airplanes. We are issuing this AD to detect and correct fatigue cracking of the intercostals on the forward and aft sides of the forward entry door, which could result in loss of the forward entry door and rapid decompression of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/09/27/05-19143/airworthiness-directives-boeing-model-737-100--200--200c--300--400-and--500-series-airplanes)
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