How often is it crucial to verify the replacement date marked on an ELT?

Verifying the replacement date marked on an Emergency Locator Transmitter (ELT) at least once every year is essential for ensuring that the device is reliable and ready for use in case of an emergency. This annual check is a part of regular aircraft maintenance and safety protocols. The ELT is a critical safety device intended to aid in locating downed aircraft, and its effectiveness depends on having a functioning battery and operational status.

Regular checks help to ensure that the equipment adheres to regulatory standards and remains in compliance with maintenance schedules. If the replacement date is not adhered to, there is a risk that the ELT may fail to operate when needed, compromising safety during emergencies. Hence, conducting this verification process annually is a best practice that enhances both pilot and passenger safety.