Which group of items must be inspected to determine the airworthiness of an engine installation?

Which group of items must be inspected to determine the airworthiness of an engine installation?

• A. Propeller, lubrication, ignition, fuel metering, cooling, and exhaust.
• B. Propeller, lubrication, ignition, cooling, and exhaust.
• C. Propeller, lubrication, ignition, fuel metering only.
• D. Propeller, lubrication, ignition, fuel metering, cooling.

Answer: (A)

Inspecting engine installation airworthiness means checking every major system that directly affects how the engine runs and how safely it is mounted. The group that covers propeller, lubrication, ignition, fuel metering, cooling, and exhaust includes all the key areas where faults can compromise performance or safety. The propeller must be sound and securely attached; the lubrication system must provide proper oil flow with no leaks or contamination; the ignition system must deliver reliable timing and spark; the fuel metering system must deliver the correct fuel flow; the cooling system must prevent overheating; and the exhaust system must be free of leaks and backpressure problems. Leaving out any one of these areas risks missing a defect that could lead to unsafe operation or regulatory noncompliance, so the comprehensive group that includes all six is the correct choice. Other groups omit one or more essential items (such as fuel metering, cooling, or exhaust), making them incomplete.

Inspecting engine installation airworthiness means checking every major system that directly affects how the engine runs and how safely it is mounted. The group that covers propeller, lubrication, ignition, fuel metering, cooling, and exhaust includes all the key areas where faults can compromise performance or safety. The propeller must be sound and securely attached; the lubrication system must provide proper oil flow with no leaks or contamination; the ignition system must deliver reliable timing and spark; the fuel metering system must deliver the correct fuel flow; the cooling system must prevent overheating; and the exhaust system must be free of leaks and backpressure problems. Leaving out any one of these areas risks missing a defect that could lead to unsafe operation or regulatory noncompliance, so the comprehensive group that includes all six is the correct choice. Other groups omit one or more essential items (such as fuel metering, cooling, or exhaust), making them incomplete.