# Airworthiness Directives; Boeing Model 737-200, -200C, -300, and -400 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 1998-12-09 · Effective 1998-12-24 · 63 FR 67769
## Document
- **Document number:** 98-32361
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 67769
- **Publication date:** 1998-12-09
- **Effective date:** 1998-12-24
- **FAA docket:** Docket No. 98-NM-291-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 737-200, -200C, -300, and -400 series airplanes. This action requires repetitive inspections to detect cracking of the corners of the door frame and the cross beams of the aft cargo door, and corrective actions, if necessary. This action also provides an optional terminating action for the repetitive inspection requirement of this AD. This amendment is prompted by reports indicating that fatigue cracks have been detected in the corners of the door frame and the cross beams of the aft cargo door on several in- service airplanes, and by another report indicating that rapid depressurization occurred during flight on one of those airplanes. The actions specified in this AD are intended to prevent fatigue cracking of the corners of the door frame and the cross beams of the aft cargo door, which could result in rapid depressurization of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/12/09/98-32361/airworthiness-directives-boeing-model-737-200--200c--300-and--400-series-airplanes)
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