# Airworthiness Directives; Boeing Model 767-300 and -400ER Series Airplanes
> **Rule** · Final rule. · Published 2004-12-09 · Effective 2005-01-13 · 69 FR 71340
## Document
- **Document number:** 04-26917
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 767-300 and -400ER Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 71340
- **Publication date:** 2004-12-09
- **Effective date:** 2005-01-13
- **FAA docket:** Docket No. 2004-NM-33-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 767-300 and -400ER series airplanes, that requires replacing the tie rods for the waste tank cradle, related investigative actions, corrective actions, and special retrofit action if necessary. This action is necessary to prevent possible failure of the main deck floor stanchions and consequent collapse of the main floor during an emergency landing, which could result in passenger injury and impede passenger evacuation from the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/12/09/04-26917/airworthiness-directives-boeing-model-767-300-and--400er-series-airplanes)
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