Regulations and Government
FAA: Helo ELTs Affected by Possible G-Switch Failures
An ELT previously modified with a new hermetically-sealed longitudinal G-switch is sufficient to address the concerns of the SAIB.

An FAA Special Airworthiness Information Bulletin (SAIB CE-19-12) alerts owners of certain serial numbered Artex emergency locator transmitters G406-4, C406-1, C406-1HM, C406-2, C406-2HM, C406-N, and C406-NHM installed in helicopters that they may not transmit alert and location signals in case of an accident due to an inoperative or a deteriorated G-switch. The agency has received reports of ACR Electronics ELT model C406 failures because the G-switch was inoperative.