100 Hour Inspection Checklist

Use the 100-Hour Inspection Checklist for a deep assessment of single-engine airplane components from fuselage, to landing gear and engines.

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Transport & Automotive
100 Hour Inspection Checklist

Engine Run-Up

Engine Compartment

Magnetos

Propeller

Fuel System

Landing Gear

Airframe

Aileron Control System

Flap Control System

Elevator Control System

Stabilizer Trim Control System

Rudder Control System

Emergency Locator Transmitter

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Checklist by GoAudits.com – Please note that this checklist is intended as an example. We do not guarantee compliance with the laws applicable to your territory or industry. You should seek professional advice to determine how this checklist should be adapted to your workplace or jurisdiction.

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100 Hour Inspection Checklist

Use the 100-Hour Inspection Checklist for a deep assessment of single-engine airplane components from fuselage, to landing gear and engines.

1. Are the engine temperatures and pressures inspected?

2. Is the Static RPM verified?

3. Is the magneto drop noted during inspection, paying particular attention to any differences between the drop on the two magnetos?

4. What are the readings during the inspection :Left

5. What are the readings during the inspection :Right

6. What are the readings during the inspection : Difference

7. Is the engine response to changes in power checked?

8. Are any unusual engine noises inspected?

9. Is the propeller response through pitch range checked?

10. Is the fuel tank selector or shut-off valve operated on each tank and off positions long enough to ensure the valve functions properly?

11. Are the idling speed and mixture checked?

12. Is the proper idle cut-off checked?

13. Is the generator warning light or ammeter looked at?

14. Is the suction gauge inspected?

15. Is the fuel flow indicator functioning properly?

16. Is the magneto switch shut off at idle?

1. Is the oil cooler checked for security, leaks, and obstructed air passages?

2. Is the induction air filter examined?

3. Is the entire engine assembly looked at?

4. Is the induction air box inspected for internal cleanliness, cracks, and security?

5. Are the doors checked for operation and sealing?

6. Is the security and proper operation of the controls inspected?

7. Are the cold and hot air flexible hoses checked for security, kinks, holes, chafing, and burnt spots?

8. Is the engine baffle examined for security, sealing, cracks, metal deformation, and the attachment of sealing strips?

9. Are the cylinders inspected for security, cracks, and broken cooling fins? Are the rocker box covers checked?

10. Are the push rod housings inspected for security, oil leaks, cracks, and dents?

11. Are the crankcase, oil pan, and accessory section checked for security, oil leaks, and proper safetying?

12. Is the front crankshaft seal checked for any signs of oil leakage?

13. Is the oil filter checked? Is there a new filter installed, if needed?

14. Are all lines and hoses inspected for security, leaks, deteriorated hoses, and loose or corroded clamps?

15. Are the drain lines and hoses examined for security, leaks, and any signs of chafing?

16. Is the intake system checked thoroughly for security, leaks, deteriorated hoses, loose or corroded clamps, and any signs of chafing?

17. Is the exhaust system inspected for security, leaks, cracks, burned-out spots, and internal flame arrester cones?

18. Is the ignition harness examined for security, chafing, burning, defective insulation, and loose or broken terminals?

19. Are the spark plugs checked for the proper gap, cleanliness, and evidence of reliable operation?

20. Are the crankcase and vacuum system breather lines checked for security, obstructions, corrosion, cracks, and chafing?

21. Are all electrical wiring in the engine compartment inspected for security, chafing, defective insulation, and loose or broken terminals?

22. Is the vacuum pump checked for security, oil leaks, and proper safety?

23. Is the vacuum relief valve inspected for security, cleanliness of the inlet filter, and corrosion, and is safetying ensured?

24. Are the engine, propeller controls, and linkage checked for security, proper rigging, binding, excessive wear, cracks, misalignment, corrosion, safetying, and chafing?

25. Are the engine shock mounts checked for security, safety, and deterioration?

26. Is the engine mount checked for cracks, corrosion, dents, bends, and evidence of overheating?

27. Are the ground straps looked at for security, corrosion, fraying of braided straps, and cracking of metal straps?

28. Are the cabin heater valve and door checked for proper operation, sealing, cracks, and deformation?

29. Are the controls inspected for security, binding, proper rigging, and alignment?

30. Is the starter checked for security, and oil leaks, and are tight electrical connections ensured?

31. Is the engagement lever verified for proper rigging and return spring tension?

32. Is the alternator inspected for security, and any oil leaks if the generator is fastened to the accessory case?

33. Are the drive belts checked for cuts, fraying, and excessive wear?

34. Is the security of all electrical connections ensured?

35. Is the carburetor inspected for security, cracks, corrosion, fuel leaks, and cleanliness of the inlet screen, also is proper safetying ensured?

36. Is the engine cowling examined for cleanliness, proper fit, security, cracks, dents, cuts, tears, loose or broken hinges, defective latches or fasteners, and deteriorated paint?

37. Are the cowl flaps checked for their condition and operation, including cleanliness, proper fit, security, cracks, dents, cuts, tears, loose or broken hinges, and deteriorated paint?

38. Are the controls securely fastened, properly rigged, and free from any binding?

39. Are all compressions checked?

1. Are the breaker points examined for security, pits, burns, and carbon deposits?

2. Are cam followers lubricated?

3. Are the ventilator screens checked for cleanliness and security?

4. Are the magnetos correctly timed to the engine and securely attached?

1. Are the constant-speed propellers inspected for nicks, cracks, corrosion, bends, dents, loose nuts and bolts, oil leaks, freedom of blade movement, excessive looseness of blades, security, and proper safety?

2. Is the governor checked for security, safety, cracks, and oil leaks?

3. Is the control verified for correct rigging, security, no binding, and proper safety?

4. Are the spinner and spinner bulkhead inspected for cracks, dents, alignment, security, and the condition of the paint?

1. Is the fuel strainer checked for internal cleanliness, security, leaks, and safety?

2. Are the drain valve and control verified for proper rigging, operation, leaks, and security?

3. Are the fuel tank sump drains examined for water and sediment, leaks, security, and proper safety?

4. Are the quick-drain valves checked for proper operation?

5. Is the underside of the wings inspected for any evidence of fuel leaks?

6. Are the fuel tank filler cap placards verified for legibility?

7. Are the caps inspected for leaks, and is security ensured?

8. Are the fuel vents checked for obstructions, leaks, security, and proper position of the vent behind the wing strut?

9. Are the fuel selector valve or shut-off valve checked for proper operation, security, leaks, and positive detent positions, and are legibility and correct indexing of the placard ensured?

10. Are all fuel lines inspected for security, chafing, leaks, cracks, dents, kinks, and corrosion?

11. Are fuel line and selector valve drains verified for leaks, and is safetying ensured?

12. Are the fuel quantity gauges (direct-reading), electrical fuel quantity gauges, and fuel quantity electrical transmitters examined for security, correct indication, defective wiring, cracked glass, legibility, and leaks?

13. Is the proper operation of the engine primer verified for proper operation and leaks?

1. Are the brakes checked for proper operation, sponginess, and failure to hold pressure, and is the fluid level adequate?

2. Are the master cylinders, brake lines, and hoses inspected for security, leaks, cracks, dents, and chafing?