# Airworthiness Directives; Boeing Model 777-200 and -300 Series Airplanes
> **Rule** · Final rule. · Published 2006-05-26 · Effective 2006-06-30 · 71 FR 30275
## Document
- **Document number:** 06-4845
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 777-200 and -300 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 71 FR 30275
- **Publication date:** 2006-05-26
- **Effective date:** 2006-06-30
- **FAA docket:** Docket No. FAA-2005-20732
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777-200 and -300 series airplanes. This AD requires replacing the battery packs of the emergency power assist system (EPAS) of the left and right non-overwing exit doors with new or modified battery packs. This AD results from intermittent failures of the EPAS battery pack found during testing, which are due to switch contamination, cam alignment problems, and inadequate self-test capability. We are issuing this AD to prevent failure of the EPAS, which could result in the inability to open the exit door during an emergency evacuation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/05/26/06-4845/airworthiness-directives-boeing-model-777-200-and--300-series-airplanes)
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