# Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
> **Rule** · Final rule. · Published 2013-10-02 · Effective 2013-11-06 · 78 FR 60656
## Document
- **Document number:** 2013-23439
- **Category:** airworthiness
- **Manufacturer:** Sikorsky
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 60656
- **Publication date:** 2013-10-02
- **Effective date:** 2013-11-06
- **FAA docket:** Docket No. FAA-2013-0352
## Abstract

We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters to require modifying the No. 1 engine forward firewall center fire extinguisher discharge tube (No. 1 engine tube) and inspecting the outboard discharge tube to determine if it is correctly positioned. This AD was prompted by the discovery that the No. 1 engine tube installed on the helicopters is too long to ensure that a fire could be effectively extinguished in the helicopter. The actions are intended to ensure the No. 1 engine tube allows for complete coverage of an extinguishing agent in the No. 1 engine compartment area, ensure that a fire would be extinguished and prevent the loss of helicopter control.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/10/02/2013-23439/airworthiness-directives-sikorsky-aircraft-corporation-helicopters)
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