How often must the Altimeter be inspected?

The correct answer regarding the inspection frequency of the altimeter is based on the regulatory requirements set forth by aviation authorities. The altimeter must be inspected every 24 months. This interval is crucial because the altimeter is a critical instrument that ensures accurate altitude readings, which are essential for safe flight operations. Regular inspections help maintain the accuracy of the altimeter, which is vital for preventing altitude-related accidents.

In aviation, the air pressure changes with weather conditions and altitude, and over time the altimeter may experience drift or errors due to mechanical wear or environmental factors. By requiring a 24-month inspection, the regulators ensure that pilots operate with dependable and precise instruments, enhancing overall flight safety.

Other options suggest shorter or longer inspection intervals that do not align with the established regulations regarding altimeter inspection, thereby not providing the necessary assurance of accuracy to pilots operating the aircraft within the required safety standards.