[Correction] ACR ELECTRONICS, Inc. — Emergency Locator Transmitter — Inspection / Modification / Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected stakeholders must inspect and test the longitudinal G-switch of ELTs before exceeding 12 months time in service or within 90 days after the AD's effective date, then at intervals not exceeding 12 months. Testing intervals must be reduced after 5 and 10 years of service, with mandatory removal and in-shop modification after 10 years. Installation of ELTs with 10 or more years time in service is prohibited from the effective date of the AD.
Summary
EASA Airworthiness Directive 2019-0235 is a regulatory document addressing emergency locator transmitters (ELTs) manufactured by ACR Electronics, Inc., specifically models G406-4, C406-1, C406-1HM, C406-2, C406-2HM, C406-N, and C406-NHM. These ELTs are installed on various Part 23 and Part 25 aeroplanes and helicopters. The directive mandates inspection, testing, modification, and replacement procedures to ensure the proper functioning of the ELTs' longitudinal G-switch.
What changed
EASA Airworthiness Directive 2019-0235 introduces requirements for repetitive testing of affected ELTs, a one-time inspection to verify configuration and time in service, and reduced test intervals based on the age of the ELT. It also mandates removal and in-shop modification of ELTs exceeding 10 years time in service. This document republished the AD to correct typographical errors in the applicability appendix.
Why it matters
This directive is critical for aviation professionals because it addresses a potential failure in the ELT acceleration sensor that could prevent transmission of emergency signals during an accident. Compliance ensures timely rescue operations, enhancing safety for crew and passengers. Operators and maintenance organizations must monitor ELT service life and perform required inspections and modifications to maintain airworthiness.
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