Which defect is defined as materially reducing the use of the unit or part, with the aircraft still safely flyable but requiring major repair within a specified timeframe?

Which defect is defined as materially reducing the use of the unit or part, with the aircraft still safely flyable but requiring major repair within a specified timeframe?

• A. Critical Defect
• B. NDI
• C. Major Defect
• D. Minor Defect

Answer: (C)

In aviation maintenance, defects are graded by how much they affect use and safety. A major defect is defined as something that materially reduces the use of the unit or part, yet the aircraft remains safely flyable and the defect requires a major repair within a specified timeframe. This means the airplane can still operate, but the issue is significant enough that it must be repaired soon rather than later. Think of it as a fault that noticeably limits performance or capability and needs substantial work, but it doesn’t make the airplane unsafe to fly right now. That contrasts with a critical defect, which would render the aircraft unairworthy and unsafe to fly, or a minor defect, which is a small issue that doesn’t affect safety or major functionality. NDI isn’t a defect type at all—it’s a non-destructive inspection method. So the defect described fits the major defect category because it reduces usability and requires major repair within a set timeframe, while the aircraft can still fly safely in the meantime.

In aviation maintenance, defects are graded by how much they affect use and safety. A major defect is defined as something that materially reduces the use of the unit or part, yet the aircraft remains safely flyable and the defect requires a major repair within a specified timeframe. This means the airplane can still operate, but the issue is significant enough that it must be repaired soon rather than later.

Think of it as a fault that noticeably limits performance or capability and needs substantial work, but it doesn’t make the airplane unsafe to fly right now. That contrasts with a critical defect, which would render the aircraft unairworthy and unsafe to fly, or a minor defect, which is a small issue that doesn’t affect safety or major functionality. NDI isn’t a defect type at all—it’s a non-destructive inspection method.

So the defect described fits the major defect category because it reduces usability and requires major repair within a set timeframe, while the aircraft can still fly safely in the meantime.