Part #:

Model: B406-4

ACR/Artex - ELT (406 MHz) w/110-328-01 Blade Antenna
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Part Number :

  • 406 MHz Emergency Locator Transmitter (Type AF ELT)
  • Designed to interface with Boeing's Master Caution System in conjunction with the DZUS mounted cockpit remote panel
  • Transmits on 406, 121.5 & 243.0 MHz frequencies
  • Activates during a crash & transmits the standard swept tone on 121.5 & 243.0 MHz
  • Every 50 seconds for 520 milliseconds (long message protocol) the 406.025 MHz transmitter turns on and transmits an encoded digital message to the Cospas/Sarsat satellite system
  • Can be programmed with the aircraft's 24-bit address as well as latitude/longitude information from the aircraft navigation system when used with the Artex ELT/NAV Interface - B (P/N: 453-6501)
  • Is compatible with all previous versions of Artex 406 MHz ELTs
  • FAA TSO C126 Approved, JTSO-2C126 Approved & COSPAS/SARSAT approved

In order to ship hazardous materials (HAZMAT) the shipper must have HAZMAT certified personnel. SEA will provide HAZMAT paperwork along with proper packaging and labeling for shipments directly to our customers.  If the shipment must be sent to another location such as a freight forwarder, SEA will provide the HAZMAT paperwork to the original ship to address only. Please contact your freight forwarder prior to ordering to verify that they are HAZMAT certified.  SEA is not responsible for issues that arise if your freight forwarder does not have HAZMAT qualified personnel.

Operating Frequencies: 406.025 MHz ± 2 kHz Biphase L (16K0G1D), 121.5 & 243.0 MHz ± 0.005% (A3X) Output Power: 406 MHz: 5W ± 2dB (520ms/50sec) for 24 hours @ -20°C 121.5/243.0MHz: 100mW min (+20dBm) for 50 hours @ -20°C
Output Connector: BNC Female Activation: Automatic by 4.5ft/sec G-Switch or Manual
Battery: 5 year Lithium Temperature: Operating: -20°C to +55°C Storage: -55°C to +85°C
Self Test: G-Switch enabled 406MHz Power Antenna/Coax Connection Position Data Present Battery Time  Remote Control: ON/OFF/RESET w/Master Caution Interface; P/N 453-0161, 453-0162, 453-0163 or 453-0164
Antenna: Rod (110-338) (<350KTS) Blade (110-337) (600KTS TAS @ 25,000 ft) Mounting Hardware: Mounting Tray P/N: 452-5050 Protective Top Cover P/N: 452-3052 End Cap P/N: 452-5052
Other Parts:  Coax cable Buzzer (to alert ground crew of accidental activation) Weight: ELT Transmitter: 3lb 5.8oz Max Mounting Tray: 7 oz Protective Top Cover: 6.7oz End Cap: 3.8oz Total Weight: 4.46 lbs
Measurements: ELT Transmitter with Mounting Hardware installed: 11.74"L x 3.9"H x 3.82"W    
Part NumberB406-4 ELT Description:
453-5004 Transmitter Only (Main Assembly)
455-5034* Complete ELT System w/110-328-01 Blade Antenna
* Please Note that the Attached "Pack Lists" are for REFERENCE ONLY & are subject to change.


- Emergency Locator Transmitter

NSN: 5821-01-579-2726

Price Condition Status
- ELT (406 MHz) w/110-328-01 Blade Antenna
Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

Virtually all 406 MHz beacons incorporate a self-test mode of operation. Standard Self-Tests of beacons usually involve pressing a button or lifting a lever on the beacon and holding it for a few seconds. This usually results in the beacon flashing an LED or Strobe and/or creating an audible sound that indicates that the internal circuitry of the beacon is functioning correctly. You should always carefully follow the beacon manufacturer's instructions when carrying out a self-test as it is possible to get false results or inadvertently trigger a false alarm if perform the self-test incorrectly. If the beacon fails, then you should contact the beacon manufacturer or an appointed service agents for further advice and instructions.

Emergency Locator Transmitters (ELTs) are distress radio beacons which transmit location information about aircraft directly to Search and Rescue (SAR) forces letting them know that the owner is in grave and imminent danger.

A UIN is a Unique Identifier Number that is programmed into each beacon at the factory. The UIN number consists of 15 digit series of letters and numbers that make up the unique identity of the beacon. The UIN is on a white label on the exterior of the beacon. The UIN is also referred to as the Hex ID.

You should check the local regulations of any place you plan to visit with your beacon. Some countries require you to have a radio license and some countries even have restrictions on the use of beacons. However, if it's a true emergency, then you should always activate your beacon.

An Artex ELT with a part number ending in -999 simply indicates that the unit is not programmed and is intended to be programmed via dongle (DGL-1) or wired into the ELT NAV interface (455-6500). Mostly only fleet operators and airlines request this programming ability to avoid reprogramming an ELT during routine maintenance should the ELT be replaced.

Most Artex ELT systems are received by distributors programmed with the ELT serial number for use in the USA. Thus the P/N ends in -366. If the ELT is programmed for another country, then the appropriate labels are placed on the ELT. However, the original dataplate part number remains the same. Dealer/distributors who are authorized to program Artex ELTs are not permitted to change the part number of the ELT.

Therefore, if someone requires an Artex ELT to actually have the -999 part number then this must be requested before the distributor places the order with the factory. Otherwise, programmed ELTs can be programmed with a default hex address and ID to be equivalent to the -999 status. When this is done by an authorized programming facility, the dataplate remains the same but the separate label with country and three digit code becomes blank and the hex ID label indicates the default hex ID.
It depends on the make and model of the ELT. However, most 406 ELTs have a battery life of either 4 or 5 years. Most batteries can transmit for as long as 24 hours.
Programmed aircraft information is essential for search & rescue, should the ELT be activated. When activated, the ELT will transmit your identifier.

An Emergency Locator Transmitter (ELT) should be programmed with either the aircraft tail #, a serial #, or the aircraft operator designator. The aircraft information programmed is determined by your country's requirements. The information is sent to the government agency responsible for keeping the database of the country in which your aircraft is registered.

The ID is linked to your SAR database, containing valuable aircraft information: Type of Aircraft, Address of Owner, Telephone # of Owner, Aircraft Registration #, and Alternate Emergency Contact, etc.

Keeping this information up to date & accurate is a major concern of the Search & Rescue Centers. Without accurate information, valuable time may be lost in attempting to locate the owner of the aircraft.

Your ELT can easily be programmed by a certified repair station, such as Southeast Aerospace.

Contact Southeast Aerospace today for more information on ELT programming.

This system has been modified from the standard Artex ELT system to interface with Boeing's Master Caution System and the 455-6501, ELT to NAV Interface. The system is approved for use on all models of the 737, 747, 757, 767 & 777. The system includes: Transmitter, High Speed Blade Antenna, Horn/Buzzer, Installation Kit and Mounting Bracket Assembly, Coax Cables, Manual and Drawings. For 737 installations a Zeus mounted remote panel is also required, P/N 453-0161. The B406 is COSPAS/SARSAT, FAA TSO C126, & JTSO-2C126 & Boeing Approved.

COSPAS is an acronym for the Russian words "Cosmicheskaya Sistema Poiska Avariynyh Sudov" . These Russian words translate to "Space System for the Search of Vessels in Distress".
SARSAT is an acronym for "Search And Rescue Satellite-Aided Tracking". The SARSAT system was developed as a joint effort by the USA, Canada, and France.
Click here to view the ELT reference guide.
Click here to view the guidelines.

If a problem is detected in the ELT, the LED will produce a coded signal. The LED will flash in order of importance with approximately .5 to 1 second pulse between each coded signal if multiple errors are present. The coded signal and related problems are as follows:

  • 1 flash indicates a G-switch loop open failure
  • 4 flashes indicate a 406 MHz transmitter problem such as defective or unconnected coax, low power output or programming error
  • 7 flashes indicate a battery problem. Usually this occurs when the battery usage time is over an hour. A bench test by an approved Artex service center can indicate how many times the ELT has been activated and for how long

Southeast Aerospace has full bench test and programming capabilities for all Artex (Cobham) ELTs. Please contact the SEA Service Dept for any ELT service questions.

Even though the battery pack expires 5 years from the date the ELT is shipped from Artex, there are other factors that take priority. The Artex manual states that the battery pack must be replaced with a new battery pack in the following situations:
  • After use in an emergency
  • After an inadvertent activation of unknown duration
  • When the total of all known transmission exceed 1 hour
  • On or before the battery replacement data as indicated on the battery label

If any of these conditions are met, the battery must be replaced.

Artex batteries contain a microchip that records total activation time and number of activation times. The ELT tester will show this information when the unit is tested.