Service Notice SN020

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Artex Aircraft Supplies, Inc., issued Service Bulletin No. 20 to inform owners of C406-1, C406-1 HM, C406-2, C406-2 HM, B406-4 and G406-4 Emergency Locator Transmitters that a software deficiency detected in the “National Location Protocol” and the “Standard Location Protocol” could under specific circumstances affect the accuracy of the position transmitted.

Artex has been working with Cospas/Sarsat on resolving the problem and a software update has been approved by the FAA and Cospas/Sarsat.

The following ELT models are affected:

• C406-1
• C406-1 HM
• C406-2
• C406-2 HM
• B406-4
• G406-4

if connected to an ELT to NAV Interface and

if programmed with “Standard Location Protocol” or “National Location Protocol”

ELT models programmed with a different protocol or not connected to an ELT to NAV Interface are not affected.

In case of ELT activation during an emergency, the Cospas/Sarsat satellites as well as the Search and Rescue infrastructure will overcome the reduced location accuracy transmission through Doppler and DF thus the life saving capability of the 406 MHz technology is not compromised.

Click here for Service Bulletin No 20

Owners of affected ELTs have received letters through OEMs and distributors communicating the software update requirement with instructions on how to administer the retrofit of their ELTs during the annual maintenance procedures.

Any owner of Artex ELTs not having received any communication but concerned if their beacon is affected, may click the following link and enter the 15 digit hex id found on a label affixed to the ELT as well as in a copy of the original ELT registration document that was used to register the ELT with the authorities.