# Airworthiness Directives; Pratt & Whitney Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2020-03-31 · Effective 2020-04-15 · 85 FR 17742
## Document
- **Document number:** 2020-06554
- **Category:** airworthiness
- **Manufacturer:** Pratt & Whitney Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 85 FR 17742
- **Publication date:** 2020-03-31
- **Effective date:** 2020-04-15
- **FAA docket:** Docket No. FAA-2020-0299
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney (PW) PW1519G, PW1521G, PW1521G-3, PW1521GA, PW1524G, PW1524G-3, PW1525G, and PW1525G-3 model turbofan engines. This AD requires the removal from service of certain electronic engine control (EEC) full authority digital electronic control (FADEC) software and the installation of a software version eligible for installation. This AD was prompted by reports of four in-flight shutdowns (IFSDs) due to failure of the low-pressure compressor (LPC) rotor 1 (R1) and by subsequent findings of cracked LPC R1s during inspections. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/03/31/2020-06554/airworthiness-directives-pratt-and-whitney-turbofan-engines)
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