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Cessna 150M Checklist

The preflight checklist in an aircraft verifies that all systems are flight-worthy before the engines are started. Preflights include cockpit controls, engine, fluids, control surfaces and airframe inspection. The purpose of the checklist is to standardize the steps so no deviations or shortcuts are allowed to corrupt the procedure. The checklist for the Cessna 150 may be subdivided as follows as the pilot moves in a systematic rotation around the aircraft: inside, left outside, tail, right outside, front.
  1. Inside

    • Remove the control lock on the control yoke. Verify that the ignition is in the "Off" position and the keys are not in the ignition. Turn on the red master power switch. Lower the flaps to the 20-percent position. Check both fuel gauges for the amount of fuel in each tank. Check the fuel switch located between the seats and verify that it is in the "On" position. Turn the red master power switch off.

    Left Outside

    • Step outside the plane and check the left main tire. Examine the wheel brake and brake line. Verify that the wheel covering is secure. Insert the plastic fuel test cup into the left fuel tank drain port and visually examine a fuel sample for water. Measure the quantity of fuel in the left fuel tank with a dipstick. Make sure the fuel cap is tight.

    Left Outside (Continued)

    • Remove the pitot tube cover and examine the pitot tube to make sure it is free of obstructions. Also make sure the fuel tank overflow tube is not blocked. Verify that the stall opening in the wing is clear. Visually examine the leading edge of the left wing for dents or other evidence of structural problem. Lift the aileron and check the integrity of the hinges and weights. Grasp the left flaps manually to verify that they are securely attached.

    Tail

    • Inspect the left leading edge of the left horizontal stabilizer for damage and structural integrity. Manually move the rudder and elevator to verify freedom of motion and the security of their respective hinges, operating cables and bolts. Inspect the leading edge of the right horizontal stabilizer for damage and structural integrity.

    Right Outside

    • Grasp the right flaps manually to verify that they are securely attached. Lift the right aileron to check the integrity of the hinges and weights. Visually examine the leading edge of the right wing for dents or other evidence of structural problem.

    Right Outside (Continued)

    • Insert the plastic fuel test cup into the right fuel tank drain port and visually examine the fuel sample for water. Measure the quantity of fuel in the right fuel tank with a dipstick. Make sure the right fuel cap is tight. Also make sure the fuel tank overflow tube is not blocked.

    Front

    • Check the engine oil level. Drain the fuel strainer. Examine the integrity of the strut and condition of the front tire. Examine the propeller for nicks and cracks. Move the propeller back and forth to check its security. Check the carburetor air filter for obstruction. Check the static port on the left side of the front cowling to make sure it is not clogged.


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