FAA Ground School Practice Test

When is an emergency locator transmitter (ELT) required to be replaced?

1. After 12 months of usage

2. When it has been activated

3. When 50 percent of each 100-hour or annual inspection is completed

4. Once every year regardless of usage

The correct answer is: When 50 percent of each 100-hour or annual inspection is completed

An emergency locator transmitter (ELT) is required to be replaced when it has been activated. This is critical because once an ELT has been used, especially in an emergency situation, its reliability may be compromised. The activation can cause wear and tear on the device or deplete its battery, which could affect its performance in the future if it needs to be deployed again. The other options do not accurately reflect the regulations surrounding ELT replacement. For example, a replacement isn't mandated after just 12 months of usage or based on a percentage of inspection time. Moreover, the requirement for annual checks or replacements emphasizes the importance of ensuring the device's functioning capability throughout its lifecycle, rather than replacing it every year regardless of its activation status.