Airworthiness DirectiveEASA AD US-2025-23-06

Fuselage - Attach Fittings and Upper Splice Fitting of the Stub Beam Horizontal Pressure Deck - Inspection

Published: Dec 10, 2025
Effective: Jan 13, 2026

Boeing 787

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Affected operators must perform the required inspections of the stub beam horizontal pressure deck attach fittings and upper splice fitting by January 13, 2026. They may use either HFEC or XRF inspection methods to determine the titanium alloy type. If cracks or incorrect materials are found, operators must carry out the specified investigative and corrective actions, including repairs or replacement of fittings with approved Ti-6Al-4V alloy parts, following Boeing Alert Requirements Bulletin B787-81205-SB530091-00 RB, Issue 001.

Summary

Fuselage - Attach Fittings and Upper Splice Fitting of the Stub Beam Horizontal Pressure Deck - Inspection is a Federal Aviation Administration (FAA) Airworthiness Directive (AD 2025-23-06) that applies to certain Boeing 787-9 and 787-10 airplanes. This AD addresses the issue of pressure deck splice fittings that may have been manufactured with an incorrect titanium alloy material. It requires inspections to determine the titanium alloy type and mandates corrective actions if necessary to ensure structural integrity.

What changed

This new AD introduces a mandatory inspection of the attach fittings and upper splice fitting of the stub beam horizontal pressure deck on affected Boeing 787-9 and 787-10 airplanes. It allows either a High Frequency Eddy-Current (HFEC) or handheld X-Ray Fluorescence (XRF) inspection method to determine the titanium alloy material. The AD also specifies on-condition actions including crack inspections, repairs, and replacement of affected fittings with correct Ti-6Al-4V alloy parts.

Why it matters

This AD is critical for aviation professionals because incorrect titanium alloy materials in pressure deck splice fittings can lead to premature cracking and loss of residual structural strength. Operators and maintenance teams must comply to prevent potential structural failures that could compromise aircraft safety and airworthiness. Timely inspections and corrective actions help maintain compliance with FAA regulations and ensure continued safe operation of affected Boeing 787 aircraft.

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