Static grounds are tested how often?

Static grounds are tested how often?

• A. Every 12 months
• B. Every 24 months
• C. Every 36 months
• D. Every 48 months

Answer: (B)

Static grounds are tested every two years to ensure the bonding path from the airframe to the grounding point remains a low-impedance route for dissipating static electricity. Over time, corrosion, paint buildup, or loose hardware can raise resistance or break the bond, which can lead to improper grounding during fueling and airframe instrumentation, increasing the risk of electrical faults or sparks. The test involves measuring the resistance between the static ground point and a clean reference on the structure, confirming the bond is intact, and ensuring contact surfaces are free of coatings that would impede conduction. Shorter intervals (every year) would be more frequent than necessary for routine checks, while longer intervals (every 3 or 4 years) risk degradation going unnoticed. The 24-month schedule is a practical balance used in many maintenance programs.

Static grounds are tested every two years to ensure the bonding path from the airframe to the grounding point remains a low-impedance route for dissipating static electricity. Over time, corrosion, paint buildup, or loose hardware can raise resistance or break the bond, which can lead to improper grounding during fueling and airframe instrumentation, increasing the risk of electrical faults or sparks. The test involves measuring the resistance between the static ground point and a clean reference on the structure, confirming the bond is intact, and ensuring contact surfaces are free of coatings that would impede conduction.

Shorter intervals (every year) would be more frequent than necessary for routine checks, while longer intervals (every 3 or 4 years) risk degradation going unnoticed. The 24-month schedule is a practical balance used in many maintenance programs.