EASA SIB 2011-18: Techtest Ltd. Emergency Locator Transmitter (ELT) — Marking and Training Considerations

What to do

Operators should ensure antennas on Techtest Type 500 ELTs are extended and kept upright and out of water for proper signal transmission. Units manufactured before mid-2009 should be fitted with placards explaining antenna extension. Comprehensive initial and recurrent training must be provided to all potential users to understand the ELT's multiple beacon and voice reception functions, including recognizing transmission status and avoiding false alarms.

Summary

EASA Safety Information Bulletin SIB No. 2011-18 titled Techtest Ltd. Emergency Locator Transmitter (ELT) — Marking and Training Considerations addresses the use of Techtest Ltd. Type 500-12, 500-16, and 500-27 ELTs installed or carried on all aircraft categories. The bulletin highlights specific operational characteristics and training needs related to these ELTs, which may be classified as either ELT-S or Personal Locator Beacons (PLBs).

What changed

This bulletin introduces information about the Techtest Type 500 ELTs' 'multiple beacon' feature that can suppress homing signals when detecting other signals on 121.5 or 243 MHz frequencies. It clarifies that this feature can delay rescue operations and that the automatic voice reception function does not meet current EASA requirements for optional voice capability. The bulletin provides recommendations for marking and user training to mitigate these issues.

Why it matters

Understanding the unique behavior of Techtest Type 500 ELTs is critical for aviation operators and rescue teams to avoid misinterpretation of signals during emergencies. Proper marking and training ensure that users can correctly operate the devices and avoid delays in search and rescue operations. Compliance with these recommendations enhances safety and effectiveness in locating survivors.