# 2025-00371: Boeing 757s Have Valves That Just Won't Open Sometimes

2025-00371, Airworthiness Directives; The Boeing Company Airplanes, is a Federal Register rule from an unnamed agency published 2025-01-10, effective 2025-02-14 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2025-00371
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-00371
- Title: Airworthiness Directives; The Boeing Company Airplanes
- Type: Rule
- Agencies: unknown
- Citation: unknown
- Published: 2025-01-10
- Effective: 2025-02-14
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## In one line

Boeing 757s Have Valves That Just Won't Open Sometimes

## Summary

The FAA is making sure certain Boeing 757 airplanes stay safe by fixing a problem with a part that controls power flow. Starting February 14, 2025, airlines must install new relays and update wiring to prevent the power control valve from getting stuck. This update helps avoid potential safety issues and keeps flights running smoothly, with some costs for the fixes but big peace of mind.

## 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.

## Effects PRIA read

- Mandatory PTU Relay and Wiring Fix: cost, medium. Starting February 14, 2025, operators of certain Boeing 757-200, -200PF, -200CB, and -300 airplanes identified in Boeing Alert Requirements Bulletin 757-29A0071 RB (dated November 16, 2023) must install new relays and change wire bundles to the power transfer unit (PTU) control valve. The FAA estim…
- Allowed Connector Position Flexibility: benefit, low. The AD allows installers to use any open position on the P33 panel or disconnect bracket AD0880 or AD0881 for installing the new connectors instead of the specific positions shown in the Boeing requirements bulletin. The operational test specified in the AD remains required to verify system functio…
- AMOC and Compliance-Time Extension Option: benefit, low. Operators may request FAA approval of alternative methods of compliance (AMOCs) under 14 CFR 39.19, and the FAA will consider requests to extend the compliance time if operators submit sufficient substantiating data. AMOCs must be approved by the Manager, AIR-520, Continued Operational Safety Branc…
- Reduced Risk of Takeoff Performance Failure: benefit, high. The AD addresses reports of PTU control valves failing to open when commanded; fixing relays and wiring reduces the risk that, together with loss of the left engine or engine-driven pump (EDP) during takeoff, the landing gear would not retract in a timely manner and could affect climb performance.…

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## Sources
- [2025-00371 on federalregister.gov](https://www.federalregister.gov/documents/2025/01/10/2025-00371/airworthiness-directives-the-boeing-company-airplanes)
- [2025-00371 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-01-10/pdf/2025-00371.pdf)

## Related
- [Previous: 2025-00361, Department of State 2025 Civil Monetary Penalties Inflationary Adjustment](https://policyrisk.com/federal-register/2025-00361)
- [Next: 2025-00374, Notification of Inflation Adjustments for Civil Money Penalties](https://policyrisk.com/federal-register/2025-00374)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-00371 (as of 2026-06-11).