How often should aircraft pitot-static systems be inspected?

Aircraft pitot-static systems are crucial for the accurate functioning of various flight instruments, including the altimeter, airspeed indicator, and vertical speed indicator. These systems must be inspected regularly to ensure the safety and reliability of the aircraft. Annual inspections are required by regulatory authorities to verify that the systems are free of blockages and leaks, and that the instruments are calibrated correctly.

This yearly inspection schedule helps maintain the integrity of vital flight information, as even the smallest malfunction in the pitot-static system can lead to significant issues in flight performance and pilot navigation. Regular annual checks help prevent potential hazards associated with faulty readings that could mislead pilots and compromise flight safety.

In contrast, inspection frequencies such as monthly, every two years, or every five years would not provide sufficient oversight to ensure the continuous operability of these critical systems, thus increasing the risk of malfunction. Therefore, an inspection at least once a year is the standard that ensures ongoing compliance with safety regulations and operational integrity.