# Airworthiness Directives; The Boeing Company Model 777-200 Series Airplanes
> **Rule** · Final rule. · Published 2010-12-16 · Effective 2011-01-20 · 75 FR 78594
## Document
- **Document number:** 2010-31384
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company Model 777-200 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 75 FR 78594
- **Publication date:** 2010-12-16
- **Effective date:** 2011-01-20
- **FAA docket:** Docket No. FAA-2009-0430
## Abstract

We are adopting a new airworthiness directive (AD) for certain Model 777-200 series airplanes. This AD requires installing a new insulation blanket on the latch beam firewall of each thrust reverser (T/R) half. This AD results from an in-flight shutdown due to an engine fire indication; an under-cowl engine fire was extinguished after landing. The cause of the fire was uncontained failure of the starter in the engine core compartment; the fire progressed into the latch beam cavity and was fueled by oil from a damaged integrated drive generator oil line. We are issuing this AD to prevent a fire from entering the cowl or strut area, which could weaken T/R parts and result in reduced structural integrity of the T/R, possible separation of T/R parts during flight, and consequent damage to the airplane and injury to people or damage to property on the ground.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/12/16/2010-31384/airworthiness-directives-the-boeing-company-model-777-200-series-airplanes)
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