# Airworthiness Directives; Boeing Model 727-200 Series Airplanes Equipped with an Auxiliary Fuel Tank System Installed in Accordance with Supplemental Type Certificate SA1350NM
> **Rule** · Final rule. · Published 2008-03-26 · Effective 2008-04-30 · 73 FR 15880
## Document
- **Document number:** E8-6058
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 727-200 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 73 FR 15880
- **Publication date:** 2008-03-26
- **Effective date:** 2008-04-30
- **FAA docket:** Docket No. FAA-2008-0013
## Abstract

We are adopting a new airworthiness directive (AD) for certain Boeing Model 727-200 series airplanes. This AD requires deactivating auxiliary fuel tank systems installed in accordance with Supplemental Type Certificate (STC) SA1350NM. This AD results from fuel tank system reviews conducted by the manufacturer that identified potential unsafe conditions for which the manufacturer has not provided 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/2008/03/26/E8-6058/airworthiness-directives-boeing-model-727-200-series-airplanes-equipped-with-an-auxiliary-fuel-tank)
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