# Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters
> **Rule** · Final rule. · Published 2013-09-13 · Effective 2013-10-18 · 78 FR 56597
## Document
- **Document number:** 2013-22181
- **Category:** airworthiness
- **Manufacturer:** Eurocopter Deutschland GmbH
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 56597
- **Publication date:** 2013-09-13
- **Effective date:** 2013-10-18
- **FAA docket:** Docket No. FAA-2013-0398
## Abstract

We are adopting a new airworthiness directive (AD) for Eurocopter Deutschland GmbH (ECD) Model EC135P1, EC135P2, EC135P2+, EC135T1, EC135T2, and EC135T2+ helicopters with certain fire extinguishing systems installed. This AD requires modifying the fire extinguishing system injection tubes. This AD is prompted by a report that the injection tubes are deforming due to heat. The actions required by this AD are intended to prevent deformation of the fire extinguishing system injection tubes during a fire, which could result in impaired distribution of the fire extinguishing agent, failure of the fire extinguishing system to contain an engine fire, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/09/13/2013-22181/airworthiness-directives-eurocopter-deutschland-gmbh-helicopters)
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