Kannad S1821502-02 – 406 AF Aircraft Emergency Locator Transmitter (ELT)

The Kannad 406 AF ELT provides automatic distress alerting in the event of an aircraft crash by transmitting on the 406 MHz COSPAS-SARSAT network. It sends a digital distress signal containing unique aircraft identification data to search-and-rescue satellites, ensuring rapid location response.

The Kannad S1821502-02 emergency locator transmitter is certified under FAA STC ST02896AT, which includes Airbus A319, A320, and A321 series aircraft, as well as Boeing 767-200 and 767-300 series models. Because it meets FAA TSO-C91a and TSO-C126, as well as European JTSO standards, this 406 MHz COSPAS-SARSAT compatible ELT is suitable for installation on a wide range of other aircraft types that require a certified unit. Operators should always confirm compatibility through the Approved Model List (AML) or the aircraft manufacturer’s installation guidelines before installation.

The transmitter is installed in the aft overhead cabin, with the antenna mounted on the upper aft fuselage for optimal transmission coverage. The installation also includes a remote control panel in the cockpit and a programming dongle that connects to the transmitter for maintenance and identification updates.

Activation occurs automatically via an internal G-switch sensor when the aircraft experiences a crash-level impact. The system can also be manually triggered through the cockpit remote control panel or by using the toggle switch on the transmitter. Once activated, it transmits on 406 MHz for satellite detection and 121.5 MHz for local homing by rescue teams.

The remote control panel enables pilots to manually activate or deactivate the ELT and provides visual status indicators that confirm transmission or fault conditions. This configuration ensures immediate access to the distress beacon controls during flight and compliance with cockpit accessibility requirements under TSO-C126 certification.

Routine functional testing should occur annually, and a battery replacement or recalibration is required every five years or following activation. Maintenance includes verifying beacon operation, antenna integrity, and correct ID programming. Only authorized service centers should perform these checks to maintain certification validity.

The Kannad 406 AF uses a lithium-manganese-dioxide (Li-MnO₂) power pack, providing sufficient energy for 24 hours of continuous transmission at -4°F (-20°C). The sealed battery ensures reliability during long-term storage and must be replaced by an authorized technician in accordance with the manufacturer's guidelines.

Yes. The unit fully complies with COSPAS-SARSAT T.001/T.007 performance specifications and DO-160G environmental testing standards, allowing worldwide use. Its 406 MHz signal includes an encoded aircraft identifier that links directly to the national registration database for rapid response coordination.

Programming is performed through the Kannad S1820514-05 programming dongle, which is connected to the transmitter. The dongle loads the aircraft’s 24-bit ICAO address and operator data, ensuring correct identification in the COSPAS-SARSAT network. Programming changes must be documented in the maintenance log in accordance with regulatory requirements.

According to Kannad, the unit’s Li-MnO₂ battery should not be exposed to extreme heat, open flame, or physical damage. Disposal must comply with the IATA Dangerous Goods Regulations and local hazardous waste procedures. Improper handling can result in leakage or ignition; however, the sealed design minimizes this risk.

Testing should be conducted only within the first five minutes of an hour to avoid interference with emergency monitoring networks. Use a dedicated ELT tester or the built-in self-test function, and limit test duration to under 5 seconds. Always confirm beacon transmission and cockpit indicator functionality without triggering an actual distress signal.

Key maintenance includes replacing the battery pack every five years, inspecting the antenna during each annual check, and verifying the remote control panel. The ELT housing, bracket, and cabling should also be inspected for wear or corrosion. All maintenance activities must follow the installation manual’s step-by-step ICA (Instructions for Continued Airworthiness).

After installation, technicians should verify the 406 MHz hex code registration, confirm antenna orientation, and test manual activation through the cockpit panel. Documentation must include the installation log entry, STC reference number, and verification of ELT ID with the national registry or COSPAS-SARSAT database.