# Airworthiness Directives; Boeing Model 727-281 Airplanes Equipped With Auxiliary Fuel Tanks Installed in Accordance With Supplemental Type Certificate SA3449NM
> **Rule** · Final rule. · Published 2009-09-21 · Effective 2009-10-26 · 74 FR 48007
## Document
- **Document number:** E9-22575
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 727-281
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 74 FR 48007
- **Publication date:** 2009-09-21
- **Effective date:** 2009-10-26
- **FAA docket:** Docket No. FAA-2008-1325
## Abstract

We are adopting a new airworthiness directive (AD) for certain Boeing Model 727-281 airplanes. This AD requires deactivation of Rogerson Aircraft Corporation auxiliary fuel tanks. This AD results from fuel system reviews conducted by the manufacturer, which identified potential unsafe conditions but has not provided associated corrective actions. We are issuing this AD to prevent the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/09/21/E9-22575/airworthiness-directives-boeing-model-727-281-airplanes-equipped-with-auxiliary-fuel-tanks-installed)
---
*AI Analytics · CC0 1.0*