Nacelles / Pylons - Strut Upper Spar Areas - Test
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 787-8 airplanes must perform the required one-time leak test of the strut upper spar areas on both wings by May 4, 2020. If leaks are found, corrective actions must be taken promptly. Maintenance teams should follow the updated terminology and procedures as specified in the AD and refer to Boeing's Aircraft Maintenance Manual for additional guidance.
Summary
The Federal Aviation Administration's Airworthiness Directive 2020-05-26 addresses certain Boeing Company Model 787-8 airplanes. This directive mandates a one-time leak test of the strut upper spar areas on both left and right wing struts due to a missing bolt on the firewall that could cause flammable fluid leakage. The AD aims to prevent potential engine fires and structural wing failure caused by such leaks.
What changed
This new airworthiness directive introduces a mandatory one-time leak test for the strut upper spar areas of Boeing 787-8 wing struts and requires corrective action if leaks are detected. It clarifies terminology related to the inspection area and corrects paragraph identifiers from the proposed rule. The AD does not remove the leak test requirement despite requests to allow visual inspections instead.
Why it matters
This AD is critical for aviation professionals as it addresses a safety risk involving flammable fluid leakage that could lead to uncontrollable engine fires and structural damage. Operators and maintenance teams must ensure compliance to maintain aircraft airworthiness and prevent potential catastrophic failures. The directive also provides clarity on inspection procedures, helping maintenance personnel perform accurate and effective leak tests.
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