Wings - Lower Skin Fastener Holes - Inspection
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Boeing MD-90-30 airplanes must perform repetitive eddy current low frequency inspections of left and right side fastener holes and high frequency inspections of the lower skin as specified in Boeing Alert Service Bulletin MD90-57A031. Any detected cracks must be repaired promptly. The directive becomes effective on January 24, 2020, and inspections must commence accordingly to maintain compliance.
Summary
Airworthiness Directive 2019-24-17 is a final rule issued by the Federal Aviation Administration (FAA) addressing all Boeing Model MD-90-30 airplanes. It mandates inspections due to potential fatigue cracking in certain center wing stringers and lower skin fastener holes. The directive requires repetitive eddy current inspections and repairs if cracks are detected to ensure continued airworthiness.
What changed
This new airworthiness directive introduces mandatory repetitive eddy current low frequency inspections of fastener holes and high frequency inspections of the lower wing skin on Boeing MD-90-30 airplanes. It also requires repairs if any cracks are found. The AD is based on service experience from similar MD-80 models and expands inspection areas to address potential cracking not previously covered.
Why it matters
This directive is critical for aviation professionals as it addresses a structural integrity concern that could compromise the wing's ability to sustain limit loads. Operators and maintenance teams must implement these inspections to detect and repair fatigue cracks early, preventing possible in-flight structural failures. Compliance ensures continued safety and regulatory adherence for affected Boeing MD-90-30 fleets.
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