Wings - Main Landing Gear Support Fittings, Rear Spar and Inspar Upper Skin - Inspection
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 737 models must perform the required inspections and install standard-size fasteners as specified in Boeing Alert Service Bulletins 737-57A1318 Revision 1 and 737-57A1328. These actions must be completed by June 19, 2018, the effective date of the AD. Ongoing repetitive inspections and any necessary repairs must be conducted to maintain compliance and safety.
Summary
The Federal Aviation Administration's Airworthiness Directive 2018-09-13 addresses all Boeing 737-100, -200, -200C, -300, -400, and -500 series airplanes. This directive mandates inspections and corrective actions for cracking found in the wing inspar upper skin, rear spar upper chord, rear spar web, and main landing gear beam forward support fitting. It aims to ensure structural integrity and prevent potential fuel leaks and fire hazards.
What changed
This new airworthiness directive introduces requirements for installing standard-size fasteners in certain configurations and expands inspection areas to include the rear spar upper chord, rear spar web, and main landing gear beam forward support fitting. It also terminates previous AD 2014-12-13 after initial inspections are completed and mandates repetitive high frequency eddy current inspections with related investigative and corrective actions.
Why it matters
This directive is critical for aviation professionals as it addresses severe structural cracking that could compromise wing integrity and safety. Operators and maintenance teams must identify and repair cracks to prevent catastrophic failures, fuel leaks, and fire risks. Compliance ensures continued airworthiness and regulatory adherence for affected Boeing 737 models.
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