# Airworthiness Directives; Boeing Model 777-200 Series Airplanes
> **Rule** · Final rule. · Published 2001-09-12 · Effective 2001-10-17 · 66 FR 47380
## Document
- **Document number:** 01-22588
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 777-200 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 66 FR 47380
- **Publication date:** 2001-09-12
- **Effective date:** 2001-10-17
- **FAA docket:** Docket No. 2000-NM-334-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777-200 series airplanes, that requires inspections for cracking of the web of the horizontal and sloping pressure decks of the fuselage and certain stiffener splice angles and stiffener end fittings, and repair, if necessary. This amendment also provides an optional preventative modification, which ends the repetitive inspections. The actions specified by this AD are intended to find and fix cracking of the web of the horizontal and sloping pressure decks, which could result in rapid in-flight decompression of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/09/12/01-22588/airworthiness-directives-boeing-model-777-200-series-airplanes)
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