Which is NOT a required inspection?

The cockpit instrument check is not a required inspection mandated by regulations. While it is important for safety and ensuring that all instruments are functioning correctly, the actual regulation does not specify that a formal check must be conducted at set intervals like the other listed inspections.

In contrast, an annual inspection is a comprehensive check required by the Federal Aviation Administration (FAA) to ensure the airworthiness of an aircraft and is conducted every 12 calendar months. The VOR check is also required for aircraft operating under Instrument Flight Rules (IFR) and must be performed every 30 days to ensure that the VHF Omni-directional Range (VOR) navigation system is accurate. The Emergency Locator Transmitter (ELT) requires inspection under specific intervals (usually every 12 months or after significant use) to guarantee it will function properly in an emergency situation.

These required inspections contribute to a higher standard of airworthiness, while the cockpit instrument check, though crucial, does not have a strict regulatory requirement tied to its frequency or formalization.