What Is MEL in Aviation? MEL Explained Simply An MEL, or Minimum Equipment List, is the approved document that defines which aircraft systems and components may remain inoperative during flight, and under what specific conditions. It does not mean an aircraft is allowed to fly broken. It means a defined defect has been formally assessed, […]
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What Is a Service Bulletin? Mandatory vs Recommended Introduction If you have ever looked at a maintenance task and asked what is a service bulletin in aviation, the short answer is this: a Service Bulletin (SB) is a formal document issued by an aircraft, engine, or component manufacturer that recommends or instructs an inspection, repair,
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What Is an Airworthiness Directive (AD)? A Simple Explanation An Airworthiness Directive (AD) is a legally mandatory instruction issued by a national aviation authority requiring an operator to inspect, modify, repair, or apply an operational limitation to an aircraft, engine, propeller, or component because an unsafe condition has been identified. Unlike a manufacturer’s recommendation, an
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