{"id":58244,"date":"2024-03-11T17:08:40","date_gmt":"2024-03-11T11:38:40","guid":{"rendered":"https:\/\/aviationa2z.com\/?p=58244"},"modified":"2024-03-12T10:28:26","modified_gmt":"2024-03-12T04:58:26","slug":"faa-issues-new-ad-for-boeing-737-max-wing-spoilers","status":"publish","type":"post","link":"https:\/\/aviationa2z.com\/index.php\/2024\/03\/11\/faa-issues-new-ad-for-boeing-737-max-wing-spoilers\/","title":{"rendered":"FAA Issues New AD for Boeing 737 MAX Wing Spoilers"},"content":{"rendered":"\n

WASHINGTON-<\/strong> The Federal Aviation Administration (FAA)<\/a> has released a proposed Airworthiness Directive (AD) for Boeing <\/a>737 MAX planes due to reports of improperly installed spoiler wire bundles.<\/p>\n\n\n\n

This issue has resulted in unintended rolls during flight and poses a risk of pilots losing control of the aircraft.<\/p>\n\n\n\n

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Photo: By Steve Knight – https:\/\/www.flickr.com\/photos\/kitmasterbloke\/51341704771\/, CC BY 2.0, https:\/\/commons.wikimedia.org\/w\/index.php?curid=113415745<\/figcaption><\/figure>\n\n\n\n

FAA: 737 MAX Spoilers Issues<\/h2>\n\n\n\n

The FAA’s issuance of this airworthiness directive was prompted by a report detailing “a non-conforming installation of spoiler wire bundles that led to unintended spoiler motion, including one instance of spoiler hardover.”<\/p>\n\n\n\n

Spoilers, which are panels mounted on wings, disrupt airflow over the wings when extended, causing increased drag and reduced lift. If a spoiler experiences a ‘hardover,’ it has reached its maximum limit and becomes effectively jammed.<\/p>\n\n\n\n

The FAA has received reports of “multiple instances of unusual spoiler deployments, resulting in an uncommanded roll to the right” during the cruise phase of flight.<\/p>\n\n\n\n

The FAA investigation has highlighted the potential for a hardover of more than one flight spoiler on the same wing, exceeding full lateral control capability and leading to a loss of control of the airplane.<\/p>\n\n\n\n

In the reported cases, the aircraft’s “spoilers” warning light illuminated, and the spoiler control electronics issued a spoiler fault code. The FAA noted that the fault was intermittent and occurred on multiple flights.<\/p>\n\n\n\n

The root cause was identified as “wire chafing damage resulting from spoiler control wire bundles riding on the landing gear beam rib in the right wing trailing edge due to non-conforming installation of spoiler wire bundles during production.”<\/p>\n\n\n\n

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Photo: Alaska Airlines<\/figcaption><\/figure>\n\n\n\n

Service Bulletin (SBs) Addressed this Issue<\/h2>\n\n\n\n

The FAA has initiated a notice of proposed rule-making, asserting that the “unsafe condition…is likely to exist or develop on other products of the same type design.”<\/p>\n\n\n\n

On July 14, 2023, Boeing issued an alert bulletin addressing this concern. The bulletin is a notification to operators and maintenance organizations about necessary inspections and repairs. It outlines procedures for measuring the clearance of spoiler control wire bundles and provides instructions on ensuring adequate clearance when a fault is identified.<\/p>\n\n\n\n

The FAA’s proposed airworthiness directive (AD) would mandate the completion of tasks specified in Boeing’s alert bulletin to rectify the identified “unsafe condition” on Boeing’s 737\u20138, 737\u20139, and 737\u20138200 MAX planes.<\/p>\n\n\n\n

In its advisory bulletin, the FAA acknowledges the inability to determine the exact number of aircraft requiring these repairs. The estimated costs for inspection are $85, and repairs are anticipated to be $425.<\/p>\n\n\n\n

Furthermore, the FAA has requested Boeing to rectify a design flaw in the 737 MAX<\/a> that could compromise the aircraft’s anti-ice system, potentially resulting in a “loss of thrust on both engines.” Additionally, Boeing is mandated to resolve a distinct de-icing issue <\/a>affecting Boeing Model 787\u20138, 787\u20139, and 787\u201310 Dreamliner airplanes currently in service.<\/p>\n\n\n\n

Stay tuned with us. Further, follow us on social media for the latest updates.<\/p>\n\n\n\n

Join us on Telegram Group <\/a>for the Latest Aviation Updates. Subsequently, follow us on Google News<\/a>.<\/p>\n\n\n\n

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