# Thermal/Acoustic Insulation Installed on Transport Category Airplanes
> **Rule** · Final rule; request for comments. · Published 2005-12-30 · Effective 2006-01-30 · 70 FR 77748
## Document
- **Document number:** 05-24654
- **Category:** other
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 70 FR 77748
- **Publication date:** 2005-12-30
- **Effective date:** 2006-01-30
- **FAA docket:** Docket No.: FAA-2005-23462
## Abstract

This action modifies the requirements for improved flammability characteristics of thermal/acoustic insulation used as replacements on airplanes manufactured before September 2, 2005. The FAA has recently been provided information that the rule will apply to a much broader range of components in currently operating airplanes than was originally intended. In addition, since publishing a final rule on July 31, 2003, the FAA has learned that some requirements for improved flammability covered materials do not have a significant effect on airplane fire safety. Further, in many cases, compliant replacements are not readily available. This action focuses the requirements on replacement materials that have a greater effect on safety and are readily available, and is necessary to avoid grounding of airplanes.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/12/30/05-24654/thermalacoustic-insulation-installed-on-transport-category-airplanes)
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