# Airworthiness Directives; Boeing Model 727-200 and 727-200F Series Airplanes; 737-200, 737-200C, 737-300, and 737-400 Series Airplanes; 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747SR, and 747SP Series Airplanes; 757-200, 757-200CB, and 757-200PF Series Airplanes; and 767-200 and 767-300 Series Airplanes
> **Rule** · Final rule. · Published 2008-11-10 · Effective 2008-12-15 · 73 FR 66497
## Document
- **Document number:** E8-26352
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 727-200 and 727-200F Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 73 FR 66497
- **Publication date:** 2008-11-10
- **Effective date:** 2008-12-15
- **FAA docket:** Docket No. FAA-2005-20836
## Abstract

We are adopting a new airworthiness directive (AD) for certain Boeing transport category airplanes. This AD requires replacing any insulation blanket constructed of polyethyleneteraphthalate (PET) film, ORCON Orcofilm[reg] AN-26 (hereafter "AN-26"), with a new insulation blanket. This AD results from reports of in-flight and ground fires on certain airplanes manufactured with insulation blankets covered with AN-26, which may contribute to the spread of a fire when ignition occurs from sources such as electrical arcing or sparking. We are issuing this AD to ensure that insulation blankets constructed of AN-26 are removed from the fuselage. Such insulation blankets could ignite and propagate a fire that is the result of electrical arcing or sparking.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/11/10/E8-26352/airworthiness-directives-boeing-model-727-200-and-727-200f-series-airplanes-737-200-737-200c-737-300)
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