At what intervals must ELT water-activated batteries be performance tested?

• A. Every year
• B. 5 years
• C. Every 3 years
• D. Every 2 years

Answer: (B)

The correct answer, which indicates that ELT (Emergency Locator Transmitter) water-activated batteries must be performance tested every 5 years, is based on the requirements outlined in the Canadian Aviation Regulations. This interval is established to ensure that the battery maintains its functionality and reliability when needed for an emergency situation.

Testing the batteries every 5 years ensures that they can perform as intended during an emergency and comply with safety standards. Regular testing and adherence to this interval help to prevent any potential failures in the equipment that could occur due to battery degradation over time. It is critical for aviation safety that these devices are dependable, hence the prescribed length between performance tests.

Other intervals suggested, such as annually or every 2 or 3 years, do not align with regulatory requirements for performance testing of water-activated batteries in ELTs, indicating that shorter intervals might not be necessary for maintaining the batteries' performance, likely because the technology used in these batteries allows for a longer lifespan before testing is mandated.