Measurement While Drilling

Leak checking an aircraft’s pitot-static system is essential to ensure accurate airspeed and altitude readings. Here are the steps to perform a thorough leak check:

Visual Inspection

      • Examine the pitot tube, static ports, and associated tubing for any visible damage, cracks, or loose fittings.

Visual Inspection

      • Ensure that the pitot tube is unobstructed (free from dirt, insects, or ice) and that the drain hole is clear.

Pressurization Method:

      • Connect a Laversab pitot-static tester to the aircraft pitot tubes and static ports through appropriate adapters.
      • Apply pressure (usually around 150 knots equivalent airspeed) to the pitot system.
      • Monitor the airspeed indicator (ASI) for any sudden changes or deviations.
      • Hold the pressure for about a minute and observe if there’s any drop in indicated airspeed or altitude. This can be accomplished through the “Leak” mode from the Laversab Pitot-Static test system.
      • Slowly release the pressure to avoid damaging the ASI.

Alternate Static Source Check:

        • While in flight, switch to the alternate static source (if your aircraft has one).
        • Observe any changes in airspeed and altitude indications.
        • If there’s a significant difference, it could indicate a leak in the primary static system.

Calculating Airspeed:

      • The difference between dynamic pressure (from the pitot tube) and static pressure (from the static ports) is the pitot-static pressure differential.
      • This differential pressure is used to calculate the aircraft’s airspeed.
      • The airspeed indicator in the cockpit displays this calculated value.

Regular Maintenance:

        • Schedule routine inspections to ensure the pitot-static system remains leak-free.
        • Address any issues promptly to maintain accurate instrument readings.

Remember that a properly functioning pitot-static system is critical for safe flight. Regular checks and vigilance are essential to prevent leaks and maintain accurate air data.

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