# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2022-03-11 · Effective 2022-04-15 · 87 FR 13930
## Document
- **Document number:** 2022-05309
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 87 FR 13930
- **Publication date:** 2022-03-11
- **Effective date:** 2022-04-15
- **FAA docket:** Docket No. FAA-2021-0962
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes. This AD was prompted by reports of three incidents involving in-flight fan blade failures on certain Pratt & Whitney engines ("fan blades" are also known as "1st-stage low-pressure compressor (LPC) blades"-- these terms are used interchangeably in this AD). This AD requires installation of debris shields on the thrust reverser (T/R) inner wall at the left and right sides of the lower bifurcation, inspection of the fan cowl doors for moisture ingression, repetitive functional checks of the hydraulic pump shutoff valves to ensure they close in response to the fire handle input, and corrective actions if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/03/11/2022-05309/airworthiness-directives-the-boeing-company-airplanes)
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