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AD 2025-00371

Published 2025-01-10 · 1 model · 18 US-registered tails affected · Federal Register

Airworthiness Directives; The Boeing Company Airplanes Federal Register ↗

Abstract

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 757 airplanes. This AD was prompted by reports of several occurrences of a power transfer unit (PTU) control valve that failed to open when commanded. This AD requires installing new relays and changing certain wire bundles leading to the PTU control valve. The FAA is issuing this AD to address the unsafe condition on these products.

Applicability · by US fleet size

Federal Register text

Verbatim; the Federal Register publication is the legally binding document. Cite: 90 FR 1850. View on Federal Register ↗

[Federal Register Volume 90, Number 6 (Friday, January 10, 2025)] [Rules and Regulations] [Pages 1850-1854] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2025-00371]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-0762; Project Identifier AD-2023-01194-T; Amendment 39-22911; AD 2024-25-09] RIN 2120-AA64

Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 757 airplanes. This AD was prompted by reports of several occurrences of a power transfer unit (PTU) control valve that failed to open when commanded. This AD requires installing new relays and changing certain wire bundles leading to the PTU control valve. The FAA is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective February 14, 2025. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of February 14, 2025.