# Airworthiness Directives; Boeing Model 747-100, 747-200, 747-300, 747SR, and 747SP Series Airplanes
> **Rule** · Final rule; request for comments. · Published 1997-12-29 · Effective 1998-01-13 · 62 FR 67550
## Document
- **Document number:** 97-33668
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 62 FR 67550
- **Publication date:** 1997-12-29
- **Effective date:** 1998-01-13
- **FAA docket:** Docket No. 97-NM-294-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 747-100, 747-200, 747-300, 747SR, and 747SP series airplanes. This action requires a one-time inspection to detect cracking of the longeron splice fittings at stringer 11, on the left and right sides at body station 2598, and replacement of any cracked fitting with a new fitting. This amendment is prompted by reports that fatigue cracking was found on longeron splice fittings. The actions specified in this AD are intended to detect and correct such fatigue cracking, which could result in reduced controllability of the horizontal stabilizer.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/12/29/97-33668/airworthiness-directives-boeing-model-747-100-747-200-747-300-747sr-and-747sp-series-airplanes)
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