# Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
> **Rule** · Final rule. · Published 2016-03-18 · Effective 2016-04-22 · 81 FR 14700
## Document
- **Document number:** 2016-06124
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney Canada Corp. Turboprop
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 14700
- **Publication date:** 2016-03-18
- **Effective date:** 2016-04-22
- **FAA docket:** Docket No. FAA-2015-3732
## Abstract

We are adopting a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (P&WC) PT6A-60AG, -65AG, -67AF, and -67AG turboprop engines. This AD requires removing Woodward fuel control units (FCUs) and installing an FCU that is eligible for installation. This AD was prompted by incidents of corrosion and perforation of the two-ply Cu-Be bellows in Woodward FCUs. We are issuing this AD to prevent failure of the Woodward FCU and engine, in-flight shutdown, and loss of control of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/03/18/2016-06124/airworthiness-directives-pratt-and-whitney-canada-corp-turboprop-engines)
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