# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2025-02-14 · Effective 2025-03-21 · 90 FR 9590
## Document
- **Document number:** 2025-02643
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 90 FR 9590
- **Publication date:** 2025-02-14
- **Effective date:** 2025-03-21
- **FAA docket:** Docket No. FAA-2024-2408
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-400, 747-400F, 747-8F, and 747-8 series airplanes. This AD was prompted by a report that, during potable water servicing, there were multiple engine indicating and crew alerting system messages. The cause was the separation of a fitting and steel water supply tube above an electronics equipment cooling air filter, behind the forward cargo compartment left sidewall. This AD requires, depending on configuration, installing at certain locations: conduits on exposed potable water supply lines, envelope assemblies over all exposed potable water line fittings and exposed potable water supply lines, a slitted spray shield, a two-piece deflector shield around the equipment cooling system (ECS) air inlet, and/or a shroud on exposed potable water supply lines. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/02/14/2025-02643/airworthiness-directives-the-boeing-company-airplanes)
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