FAA Ground School Practice Test

What procedure is recommended to confirm that the emergency locator transmitter (ELT) has not been activated?

1. Perform a systems check before takeoff

2. Monitor 121.5 before engine shutdown

3. Adjust the frequency to 406 MHz

4. Check the battery status after landing

The correct answer is: Monitor 121.5 before engine shutdown

Monitoring 121.5 before engine shutdown is a recommended procedure to confirm that the emergency locator transmitter (ELT) has not been activated. This practice allows pilots to listen for any signals that might indicate an ELT has been inadvertently triggered during flight or prior to landing. The frequency 121.5 MHz is designated as the international distress frequency for locating emergency beacons, including ELTs. By monitoring this frequency just before shutting down the engine, the pilot can detect any activation of the ELT, which might signal that further investigation is necessary. Performing a systems check before takeoff is important for ensuring the overall functionality of the aircraft's systems, but it does not directly confirm the ELT's activation status specifically in real-time. Similarly, adjusting the frequency to 406 MHz relates to the newer ELT technology, which operates on a different frequency, but does not address confirming activation in the moment before shutdown. Finally, checking the battery status after landing is a good maintenance practice, but it is not an effective method for confirming ELT activation during a flight. Therefore, monitoring 121.5 before engine shutdown is the best procedure to ensure that the ELT is not inadvertently activated.