Engine Inspection Flashcards
Engine inspection is the process of systematically evaluating an engine’s condition to determine airworthiness. From routine visual checks to detailed compression tests and borescope inspections, the ability to properly inspect an engine is one of the most important skills a powerplant mechanic possesses.
The FAA Powerplant exam covers compression testing (differential and direct), borescope inspection, magneto drop checks, oil analysis, and required inspection intervals. These flashcards cover the procedures and criteria you need to know.
What You Need to Know
- Differential compression test: measures cylinder leakage as a pressure ratio
- Compression ratio of 60/80 or higher is typically acceptable
- Compression below 60/80 indicates cylinder leakage (rings, valves, or head gasket)
- Borescope: visual inspection of cylinder walls, pistons, and valves
- Magneto drop check: verifies both magnetos are functioning
- Oil analysis: spectrometric analysis detects wear metals
- 100-hour and annual inspections: include engine checks
- TBO (Time Between Overhauls): manufacturer-specified engine life limit
Why This Topic Appears on FAA Exams
Engine inspection knowledge is tested because inspections are how mechanics identify developing problems before they cause failures. The exam verifies you understand compression testing, borescope use, and what various findings indicate about engine health.
Sample Flashcards
Tap any card to reveal the answer. These are just a sample — the full deck is available inside the study platform.
What is a differential compression test?
What compression reading is generally considered acceptable?
What are the common causes of low compression?
What is a borescope inspection?
Study Tips
Focus on the differential compression test: the engine is rotated to TDC on the compression stroke, regulated air is applied (typically 80 psi), and the cylinder pressure is measured. A reading of 60/80 or higher is generally acceptable. Know that low compression can indicate bad rings, leaking valves, or a blown head gasket. Understand that borescope inspection complements compression testing.
Study Engine Inspection Flashcards Now
Access the full flashcard deck for Engine Inspection, track your mastery, and prepare for the FAA Powerplant exam.
Related Topics
Frequently Asked Questions
After applying compressed air to the cylinder at TDC, listen for escaping air: at the exhaust pipe indicates an exhaust valve leak; at the air intake or carburetor indicates an intake valve leak; at the crankcase breather or oil filler indicates ring leakage; bubbles in the coolant (if liquid-cooled) indicate a head gasket or cylinder head leak.
Ready to study all Powerplant flashcards?
Browse all Powerplant flashcard topics →