Emergency beacon corporation Ebc-406hm Instructions for use

BE SURE TO REGISTER

THIS ELT

EBC-406HM

EMERGENCY LOCATOR TRANSMITTER

INSTRUCTION AND MAINTENANCE MANUAL

EMERGENCY BEACON CORPORATION

461 TIMPSON PLACE

BRONX, NY 10455

PHONE (718) 401-0288

FAX (718) 401-0663

E-mail: [email protected]

Web: www.emergencybeaconcorp.com

July 2022

Rev. 8

EMERGENCY BEACON CORPORATION

July 2022, Rev 8

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EMERGENCY BEACON CORPORATION

July 2022, Rev 8

TABLE OF CONTENTS

SECTION 1 ................................................................................................................................................................................................... 2

GENERAL DESCRIPTION ....................................................................................................................................................................... 2

SECTION 2 ................................................................................................................................................................................................... 2

REGISTERING YOUR ELT ...................................................................................................................................................................... 2

SECTION 3 ................................................................................................................................................................................................... 2

TOGGLE SWITCH FUNCTIONS.............................................................................................................................................................. 2

SECTION 4 ................................................................................................................................................................................................... 3

ELT INSTALLATION................................................................................................................................................................................. 3

SECTION 5 ................................................................................................................................................................................................... 3

FINAL INSTALLATION ............................................................................................................................................................................. 3

SECTION 6 ................................................................................................................................................................................................... 3

TESTING THE ELT ................................................................................................................................................................................... 3

SECTION 7 ................................................................................................................................................................................................... 4

DESCRIPTION OF SELF-TEST MODE AND ERROR CODES............................................................................................................... 4

SECTION 8 ................................................................................................................................................................................................... 5

OPERATING INSTRUCTIONS................................................................................................................................................................. 5

SECTION 9 ................................................................................................................................................................................................... 5

PERIODIC INSPECTIONS ....................................................................................................................................................................... 5

SECTION 10 ................................................................................................................................................................................................. 5

EQUIPMENT LIMITATIONS ..................................................................................................................................................................... 5

SECTION 11 ................................................................................................................................................................................................. 5

BATTERY REPLACEMENT ..................................................................................................................................................................... 5

SECTION 12 ................................................................................................................................................................................................. 6

REPAIRS .................................................................................................................................................................................................. 6

SECTION 13 ................................................................................................................................................................................................. 6

EBC-406HM SPECIFICATIONS............................................................................................................................................................... 6

National Stock Numbers for the EBC-406HM Emergency Locator Transmitter:........................................................................................... 6

FIGURE 1: EBC-406HM ELT WITH BB-12M BRACKET OUTLINE WITH HOLE PATTERN ...................................................................... 7

FIGURE 2: EBC-406HM ELT WITH BB-15M TRAY OUTLINE WITH HOLE PATTERN.............................................................................. 7

GS-46 ENVIRONMENTAL QUALIFICATION FORM.................................................................................................................................... 8

EBC-406HM ENVIRONMENTAL QUALIFICATION FORM .......................................................................................................................... 8

EBC-406HM TWO YEAR WARRANTY ........................................................................................................................................................9

PLEASE READ - IMPORTANT! PLEASE READ - IMPORTANT! PLEASE READ - IMPORTANT!

WHEN USING IN AN EMERGENCY, REMOVE THE ELT FROM ITS MOUNT, EXIT AIRCRAFT, AND SET

TOGGLE SWITCH TO THE “ON” POSITION. THE ELT’S LED SHOULD BE BLINKING.

TESTING SHOULD NOT BE DONE WITH NIGHT-VISION GOGGLES. DO TEST BEFORE START-UP!

A “3 CODE” IS COMMON WHEN TESTING WITH THE TAPE ANTENNA. THIS CAN LEAD TO AN

AMBIGUOUS INTERPRETATION OF HOMER POWER. SECTION 6 DESCRIBES TEST PROCEDURES TO

ELIMINATE THIS AMBIGUITY.

CERTAIN INSTALLATIONS WILL GENERATE A “4 CODE” (BAD 406 MHZ VSWR). VERIFY THAT THE

ANTENNA IS WORKING BY REMOVING ELT FROM ITS MOUNT, AND RE-DOING THE SELF-TEST.

DURING NORMAL USE, KEEP THE 15-PIN D-SUB CONNECTOR DRY, AND FREE OF CONTAMINATION.

WHEN INSTALLING THE BB-12M, USE THREE MOUNTING SCREWS. USE HOLE PATTERN A OR B. REFER

TO PAGE 7. THE BB-15M REQUIRES FOUR MOUNTING SCREWS.

SECTION 1

GENERAL DESCRIPTION

The EBC-406HM is an Emergency Locator Transmitter (ELT)

designed for military helicopter installation. It meets the requirements

of TSO-C126 in the Automatic Portable (AP) category (see Figures 1

& 2). It is designed for mounting in the cabin of the aircraft, within reach

of the pilot or co-pilot. As with all EBC ELTs, the increased survivability

needs of cabin mounting have been met. The electronics and the

activation system are completely encapsulated, and extra protection

has been provided for the crystal. Our encapsulation method provides

added protection against shock and moisture. The ELT transmits on

406.028 MHz, the civil 121.5 MHz, and the military 243.0 MHz

emergency frequencies.

A unique characteristic of helicopter performance is that in the event

of a loss of power, a helicopter may not necessarily go down nose first

and may not have any forward motion. This may render a single axis

G-switch ineffective. The EBC-406HM has two special G-switches that

can sense deceleration forces from all directions, making it uniquely

suited for helicopter use. These 360° spherical switches are identical

to those used and proven in our original helicopter ELTs (our EBC-

302HM, EBC-302VRHMJ-121.5, EBC-302VRHMJ-243.0, EBC-

302VHMJ, and EBC-502HM models). They will not trigger during a

hard landing.

The EBC-406HM system has an LED (on the ELT) and buzzer (on the

mounting bracket/tray) to indicate ELT activation, and self-test results.

The LED and toggle switch are recessed to provide added protection

against damage and inadvertent activation.

The bottom of the ELT houses a recessed D-Sub connector that mates

with the mounting bracket/tray connector. The mounting bracket/tray

connector is wired to a buzzer, and also wired with a G-switch loop;

this loop-back enables the G-switch when properly mated to the ELT

connector.

To prevent inadvertent activation, the ELT G-switches are disabled

when the ELT is removed from its mount.

No external power connections are required. All indicators and controls

are powered from the ELT’s battery pack. Installation near the pilot

eliminates the need for a wire harness and Remote Control Monitor.

SECTION 2

REGISTERING YOUR ELT

It is required that every 406 ELT be registered by the aircraft owner

after installation, re-registered every two years, and re-registered if

there are any changes to information provided to JSETS in a previous

registration, such as telephone numbers, aircraft registration number,

change of owner, …etc.

Every 406 ELT is programmed at the factory with a unique

identification code used by the Rescue Coordination Center to

determine if an emergency has occurred. This identifier is called the

15-Hex ID. It is located on the front label of the ELT.

This unique identifier is stored in a database maintained by

DOD/JSETS. It can be accessed to contact the owner in the event of

ELT activation. Registration is free, and can even be done via the

Internet. See the Airworthiness Release for further instructions on

registration.

Make sure that the 15-Hex ID on the front label of the ELT is properly

entered on the form. Also, enter all required information. Once you

receive your registration confirmation, review it carefully. Failure to

of any changes to the status of your 406 MHz beacon could result in

penalties or unnecessary delays in search and rescue operations.

SECTION 3

TOGGLE SWITCH FUNCTIONS

The EBC-406HM must be installed in the cabin of the aircraft, within

reach of the pilot or co-pilot, for easy access in an emergency.

ON position:

This position (closest to the antenna connector) manually activates the

ELT. The ELT will begin radiating a distress signal on 121.500 MHz,

243.000 MHz, and within 50 seconds, will radiate an emergency coded

signal on 406.028 MHz.

ARM position:

This position (center position) is the normal operating position for the

ELT. When properly installed in its mount, the ELT is armed and ready

to activate if an accident is sensed. When removed from its mount, the

G-switch is disabled, and any mishandling will not result in activation;

the ELT can still be activated by setting the toggle switch to the “ON”

position.

TEST-RESET position:

This position (closest to the LED) is used to self-test, and to deactivate

the ELT.

To deactivate the ELT, momentarily hold the toggle switch in this

position (closest to LED), for about one second and quickly release.

The ELT will perform a self-test, and then deactivate. Refer to

Sections 6 and 7 for self-test instructions and results.

To self-test the ELT, momentarily move the handle from the center

position to the “TEST-RESET” position; hold for about one second and

quickly release. The ELT will perform a self-test and then deactivate.

Refer to Sections 6 and 7 for self-test instructions and results.

It is recommended that the homer signal be monitored on a radio

tuned to 121.500 MHz.

DISABLING THE AUTOMATIC ACTIVATION FEATURE

The ELT G-switch is disabled when the ELT is removed from its mount,

and enabled ONLY when the ELT is installed and properly mated to

its mounting bracket/tray connector. The mounting bracket/tray

connector has a loop-back installed at the factory. The loop-back is

checked by the self-test.

A “2 code” indicates a disabled G-switch.

EMERGENCY BEACON CORPORATION

July 2022, Rev 8

SECTION 4

ELT INSTALLATION

The EBC-406HM can be installed with the BB-12M or BB-15M mounts.

The choice is determined by the available clearance at the mounting

location.

1. The ELT can be installed in any convenient location within the

cockpit/cabin of the aircraft, preferably within reach of the pilot/copilot;

Transmitters controls must be accessible.

2. For best performance install so that the antenna is visible through

a window when viewed from the outside of the aircraft.

3. The antenna should be at least one inch away from metal window

post.

4. The mounting bracket/tray supplied with the ELT must be securely

attached to the aircraft. One way to judge the security of the installation

is to apply a force to the mounting bracket/tray of about 100 lbs, and

see that it does not move more than ¼ of 1 inch. Greater movement

would suggest that the beacon mounting is not firm enough, and

establishes a possible false alarm situation in conditions of severe

vibration or turbulence. In many cases, various military organizations

have come up with suggested mounting areas that have been

thoroughly researched and found to be preferred locations for specific

aircraft.

5. Use the BB-12M bracket or BB-15M tray as a template to mark out

the holes needed for installation, or refer to Figures 2 and 3 for

dimensions. After selecting a suitable location, drill and mount the

EBC-406HM mounting bracket or tray.

6. When installing the BB-12M, use 3 mounting screws. Use hole

pattern A or B. Refer to page 7. BB-12M hole patterns match legacy

EBC-302HM brackets. Leave a minimum of 3”of clearance on the

latch side of the bracket, as measured from the side of the bracket and

any obstruction, to allow for latch operation. The BB-15M requires 4

mounting screws.

7. Do not install to thin unsupported skin or fabric.

SECTION 5

FINAL INSTALLATION

Perform a self-test, and a full functional check, during initial install,

after battery replacement, or according to maintenance schedules.

Refer to Sections 6 and 7 for details.

Securing the ELT in the BB-12M

Gently install the ELT into its mount until it is fully seated. Do not use

excessive force. It may be necessary to adjust ELT position (front to

back, and left to right) to properly mate the connectors. Close the latch

by lifting the latch spring up, and hooking it on to the top edge of the

ELT. Depress lever until it locks into place. Verify that ELT is off, and

the toggle switch is in the center, “ARM” position.

Securing the ELT in the BB-15M

The BB-15M connector floats for easier installation and removal of the

ELT. When installing the ELT, slide the connector forward, and insert

the ELT into its mount until it is fully seated. Slide the ELT back and

close the latch by bringing the two ends of the latch strap close to

each other. Secure latch spring onto the catch, and depress the

lever until it locks into place. Verify that the ELT is off, and that the

toggle switch is in the center, “ARM” position.

SECTION 6

TESTING THE ELT

This section describes how to test the ELT to verify that it is radiating

usable signals on 121.5 MHz, and 406.028 MHZ, and that the two G-

switches are operational. LED and buzzer operation will be verified,

and the loop-back will be checked.

Perform all or some of these tests during initial install, every time the

ELT is reinstalled in its mount, after battery replacement, or according

to maintenance schedules.

To facilitate testing, EBC recommends the following items:

1. A 50-Ohm load attached to the ELT BNC connector to test power

output. If not available, allow at least 1 minute between self-tests.

2. A Male 15-pin D-connector with jumper from pins 1 to 4, for G-

switches testing.

3. A COM radio tuned to 121.500 MHz or 121.700 MHz.

SELF-TEST:

IN-BRACKET TEST

The self-test performed with the ELT in its mount, verifies proper ELT

mating with the mounting bracket connector.

OUT-OF-BRACKET TEST

G-switch tests can only be performed with the ELT out of its mount.

See “G-Switch Test” on page 4.

Always perform a self-test when the ELT is reinstalled in its mount, the

battery is replaced, or according to maintenance schedules. Section 7

describes error code meanings.

IMPORTANT:

TEST CONDITIONS DETERMINE ERROR CODES. USE THE

ERROR CODE CHART ON PAGE 4 FOR TEST RESULTS.

POWER OUTPUT CHECKS:

NOTE: With tape antenna attached, a 3-code (low 121.5 MHz

power) will be commonly observed, but not necessarily. Also,

depending on the proximity of the antenna to other objects, a 4-

code may or may not be displayed. On occasion, no codes may

be displayed; this is ok, and is due to normal manufacturing

variances.

Rotating the tape antenna can have the effect of moving it away

from objects, and can result in clearing the 4-code, but this is not

always the case.

Verify 121.5 MHz power by using one of the three methods

described below.

Method 1 –With Tape Antenna Attached

1. Tune COM radio to 121.700 MHz. If a COM is not available, an

inexpensive AM radio can be placed near the ELT antenna.

2. Perform self-test with antenna attached. ELT audio sweeps

SHOULD BE HEARD on the COM or AM radio (This is not a measured

check. It indicates that the ELT is radiating a sufficient signal to aid

search and rescue). The ELT will perform a self-test, return the results

of the test via the LED/buzzer, and then deactivate. See error code

chart

EMERGENCY BEACON CORPORATION

July 2022, Rev 8

Method 2 –With 50 Ohm Load Attached

1. Tune COM radio to 121.500 MHz.

2. Remove the tape antenna, and attach a 50-Ohm load.

3. Perform a self-test. Three ELT audio sweeps SHOULD BE HEARD

on the COM. The ELT will perform a self-test, return the results of the

test via the LED/buzzer, and then deactivate.

A “3 CODE” USING THIS METHOD IS A FAILURE!

Method 3 –Without Tape Antenna

1. Tune COM radio to 121.500 MHz.

2. Remove the tape antenna.

3. Perform a self-test without anything attached to the ELT antenna

connector. Three ELT audio sweeps SHOULD BE HEARD on the

COM. The ELT will perform a self-test, return the results of the test via

the LED/buzzer, then deactivate.

A “3 CODE” USING THIS METHOD IS A FAILURE!

ERROR CODE CHART

TEST CONDITION

COMMON ERROR CODES

ELT IN ITS MOUNT, OR

WITH LOOP-BACK JUMPER

ATTACHED:

Tape antenna connected

No codes, 3 code, 4 code

50-Ohm load connected

No error codes

With nothing connected to ELT

antenna connector

4 code

ELT OUT OF ITS MOUNT, OR

WITHOUT LOOP-BACK

JUMPER ATTACHED:

Tape antenna connected

no codes, 2 code, 3 code, 4 code

50-Ohm load connected

2 code

With nothing connected to ELT

antenna connector

2 code, 4 code

AN ERROR CODE OTHER THAN THOSE LISTED IN THIS CHART

IS CONSIDERED A FAILURE.

LED, BUZZER CHECK:

The LED and buzzer should indicate when the ELT is transmitting and

when a self-test is performed.

LOOP-BACK CHECK:

The loop-back is okay if a “2 code” is not returned, with the ELT

installed in its mount.

G-SWITCH OPERATION:

To verify that the two G-switches are operational, it will be necessary

to fabricate a jumper:

Method 1

Use a D-sub 15-pin male connector, and solder a wire between pin 1

and pin 4. Install mating connector to ELT connector.

Method 2

Remove ELT from mount and place a #24 AWG jumper between pins

1 and 4 of the ELT D-sub connector.

Verify that both G-switches are operational by performing two

activations. Tune VHF COM radio to 121.500 MHz.

Verify that the ELT’s toggle switch is set to the “ARM” position

1. Remove the tape antenna and attach a 50-Ohm load. If not

available, allow at least 1 minute between tests.

2. Test for horizontal activation by holding the ELT at arms length with

ELT in a vertical position. Swing the ELT around your body in the

horizontal plane, (like a forehand tennis swing), as fast as possible.

This may require a few tries since a great deal of force will be required

to simulate a crash. The distinctive ELT audio sweep should be heard

over the radio, and the LED should be blinking. This is not a precise

check; it only indicates that the G-switch is working. Reset the ELT.

3. Test for vertical activation, by holding the ELT at arms length with

the antenna side pointed toward the horizon. Swing the ELT around

your body as fast as possible. The distinctive ELT audio sweep should

be heard over the radio, and the LED should be blinking. This is not a

precise check; it only indicates that the G-switch is working. Reset the

ELT.

4. Remove the test jumper, reattach the tape antenna, and install the

ELT into its mount. Secure in place by closing latch.

SECTION 7

DESCRIPTION OF SELF-TEST MODE AND ERROR CODES

Set the ELT’s toggle switch to the spring loaded,

“TEST-RESET” position for 1 second and quickly release.

The self-test event occurs in the following manner:

The ELT energizes its LED/buzzer for about 1 second.

Three beacon audio sweeps are transmitted on 121.500 MHz.

One, 406.028 MHz self-test burst is transmitted.

During these transmissions, the ELT will perform a number of

internal tests on its data and electronics.

If the ELT has passed all tests, the LED/buzzer will flash/beep for one

second, and then de-energize.

If the ELT has not passed any or all of its tests, the LED/buzzer will

flash/beep for one second, and de-energize for ½ second. Following

this, error codes are indicated by one or more error indications of the

LED/buzzer.

The cadence of these on-off intervals will cause the LED/buzzer to

flash/beep for ¼ of a second interval followed by ¼ of a second de-

energized interval.

In the event that the ELT needs to signal multiple error codes, several

LED/buzzer on-off sequences will follow, one after the other, and each

sequence separated by an LED/buzzer de-energized interval of one

second.

A self-test pass is indicated by a 1-second flash/beep.

SELF-TEST ERROR CODES AND MEANINGS

EMERGENCY BEACON CORPORATION

July 2022, Rev 8

ERROR CODE

MEANING

2 code.

Missing G-switch loop back:

Can indicate that the ELT is not fully seated in its

mount, or the mating connector is not properly

attached. It can also indicate a missing jumper

from pin 1 to pin 11. This condition renders the G-

switch inoperative.

3 code.

Bad 121.500 MHz RF output power:

Can mean that the homer signal on 121.5 MHz is

not operating. This error code is normal with the

tape blade antenna.

See Section 6 for test recommendations.

4 code.

Bad 406 MHz RF VSWR:

Can indicate an antenna close to other objects.

5 code.

Low 406 RF power output:

Can indicate a low voltage battery, or a defective

406 power amplifier.

6 code.

Bad EEPROM data:

Can indicate a hardware or software fault. ELT will

only transmit on 121.5 & 243 MHz.

7 code.

Bad RAM:

Can indicate a hardware or software fault. ELT will

only transmit on 121.5 & 243 MHz.

SECTION 8

OPERATING INSTRUCTIONS

The EBC-406HM is for aviation emergency use only. In an accident

with sufficient G-forces, the ELT is automatically activated.

When using in an emergency, remove ELT from its mount, exit

the aircraft, and set the toggle switch to the “ON” position.

Setting the ELT’s toggle switch to the “ON” position manually activates

the ELT.

When the ELT is automatically or manually activated, there is a 1-

second delay before the 121.500 MHz / 243.00 MHz homer transmitter

activates. This is followed approximately 50 seconds later by the

406.028 MHz burst.

REMOVING THE ELT FROM THE BB-12M MOUNTING BRACKET

Remove the ELT from its mounting bracket by simultaneously using

the thumb to push on the snap lock, and the forefinger to pull up on

the latch lever. Move the latch out of the way, and pull the ELT out by

the lanyard.

REMOVING THE ELT FROM THE BB-15M MOUNTING TRAY

Remove the ELT from its mounting tray by simultaneously using the

thumb to push on the snap lock, and the forefinger to pull up on the

latch lever. Compress the strap against the ELT so that the latch clears

the keeper. Move the straps out of the way, and pull out the ELT.

Place the ELT on high ground with the antenna in a vertical

position. For longest operating life, if using at temperatures

below –20C, keep the transmitter inside your jacket with the

antenna exposed.

SECTION 9

PERIODIC INSPECTIONS

This inspection notice is based on FAA, AC 43.13-1B CHG 1, dated

9/27/01.

NOTE: The FCC has mandated that the transmitter test be performed

only during the first 5 minutes of each hour and last no longer than 3

audio sweeps of the ELT signal. The test must be performed a

minimum of once a year.

1. Remove the ELT Tape antenna. Visually inspect and confirm proper

seating of all BNC connector pins at the antenna end, and at the ELT

end. Special attention should be given to coaxial center conductor pin,

which may retract into the conductor housing. Check for corrosion, and

any obvious signs of wear.

2. Remove the ELT from its mount and inspect D-Sub connectors for

corrosion, and any obvious signs of damage, such as bent or missing

pins. Inspect the mounting hardware for stability. All required mounting

hardware should be reinstalled and secured.

3. Inspect the battery pack. No corrosion should be detectable. Verify

that the ELT battery connectors are fully mated with no gap between

them. Verify that the battery is an approved pack, GS-46,

manufactured by Emergency Beacon Corporation. Check the battery

pack’s expiration date.

4. Perform full functional tests as described in Section 6.

SECTION 10

EQUIPMENT LIMITATIONS

The conditions and tests required for TSO approval of this article are

minimum performance standards. It is the responsibility of those

desiring to install this article on a specific type or class of aircraft to

determine that the aircraft installation conditions are within the TSO

standards. The article may be installed only if further evaluation by the

applicant documents an acceptable installation and it is approved by

the Administrator.

This equipment must be installed according to the recommendations

outlined in this manual. Only Emergency Beacon Corporation TSO

approved parts are to be used. Substitution of other components will

void the warranty. Any deviation may result in failure of the equipment

to operate properly.

SECTION 11

BATTERY REPLACEMENT

FAR 91.207(c) requires that the battery in the ELT be replaced in

accordance with the replacement date marked on the ELT or when

the transmitter has been in use for more than one cumulative hour.

The battery replace label is found on the exterior of the ELT and on

the battery. The battery pack must be replaced every 5 years or after

one hour of cumulative use. The battery should not be stored where

the ambient temperature is above 80C, or below –40C.

WARNING: Use only battery, P/N GS-46. The ELT will not meet the

requirements of TSO-C126 if used with another battery. GS-46 battery

packs are available from Emergency Beacon Corporation (EBC) and

its dealers.

BATTERY INSTALLATION PROCEDURE:

1. Verify that the ELT is off, and remove it from its mount.

2. Unscrew the 4 back cover screws and remove cover.

EMERGENCY BEACON CORPORATION

July 2022, Rev 8

3. Observe the manner in which the current battery is situated within

the ELT. The new battery must be installed in the same physical

orientation as the current battery.

4. Remove the plastic U strip spacer.

5. Grasp battery connectors, and pull apart. Do not pull on the wires or

they may be damaged! The battery pack is a Class 9 hazardous

material. Dispose of according to local regulations.

6. Check for corrosion on the battery connector, the BNC connector,

and D-Sub connector. Clean as required.

7. Insert new battery with label facing up, and remove “Replace Battery

By” label. Tightly mate connectors.

8. Install plastic U strip spacer.

9. Install the “Replace Battery By” label, on the side of the ELT.

10. Reinstall back cover, and antenna.

11. Perform tests as per Section 6. Install ELT into mount.

The Part Number for a replacement battery pack is GS-46.

CAUTIONS:

This battery pack is comprised of 3 lithium manganese dioxide cells.

Do not disassemble the battery pack. Do not short circuit. Lithium is

flammable. Do not dispose of the battery pack in or near fire or flame.

The conditions and tests required for this TSO approval of this battery

are minimum performance standards. It is the responsibility of those

desiring to install this battery in a specific class of aircraft to determine

that the aircraft installation conditions are within the TSO standards.

The battery may be installed only if further evaluation by the applicant

documents an acceptable installation and is approved by the

administrator. Lithium battery safety concerns include the possibility of

fire, venting violently, and venting toxic gases.

Battery Specifications:

System:................................................ Non-rechargeable Lithium

Manganese Dioxide

Nominal Open Circuit Voltage .............9.8 VDC, Red lead positive

Total Lithium Content ..........................10.2 grams

Nominal Size........................................H = 2.53” W =1.42” L = 4.14”

Nominal Weight ...................................Approximately 1.2 lbs.

Certification..........................................TSO-C142

SECTION 12

REPAIRS

Should you experience any problems with your ELT, contact the

factory for advice. Should repairs become necessary, remove the

battery. Send the ELT, less battery, to the factory. EBC is the only

authorized repair facility. Please include a note describing the

problem. EBC will evaluate the unit and contact you with a repair

estimate. There is a nominal fee for this inspection unless the ELT is

under warranty.

SHIPPING INSTRUCTIONS:

1 –Send the ELT without battery.

2 –Enclose a note describing the problem, and if a new battery is

needed. Include your name, address and telephone number.

3 –Pack well and insure.

The customer pays shipping costs to and from the factory.

Send the ELT to:

Emergency Beacon Corporation,

15 River Street

New Rochelle, New York, 10801, USA

SECTION 13

EBC-406HM SPECIFICATIONS

Operating Frequencies:.............. 406.028 MHz, 121.500 MHz,

and 243.000 MHz

Modulation 406 MHz:.................. Biphase L (16KOG1D)

Modulation 121.500 MHz: ......... Swept tone 1600 Hz to

300 Hz, 2-4 times/second

Output Power on 406 MHz: ........ 5W for 24 hours at –20 C

Output Power on 121.5 MHz: ..... 50 mW min for 50 hours at –20 C

Operating Temperature: ............. -20 C to +55 C

Battery Type: .............................. Li-MnO2

Useful Battery Life: ..................... 5 years or 1 hour of cumulative use

Automatic Activation:.................. True 360° spherical 6 axis

G-switch system ......................... 5-7 G’s

Altitude: ...................................... 50,000 ft

Decompression: ......................... 8000 ft to 50,000 ft

Over Pressure: .......................... -15,000 ft

Humidity: .................................... 95% for 144 hours

Shock Performance: .................. 500 Gs for 4ms; 100 Gs for 100ms

Vibration: ................................... Withstands 10 Gs

Immersion: ................................. 24 hours in salt water

Message Protocols:.................... Aviation User Protocol,

Serialized Aviation User Protocol

Activation Alerts.......................... LED and buzzer

Input Power ................................ No Aircraft Power Required

PHYSICAL FEATURES:

Size (ELT): ................................. H = 6.7” W = 2.9” D = 2.5”

Total Weight: ............................. 2.75 lbs.

Case Material: ........................... Aluminum

Finish: ........................................ Flat Black

National Stock Numbers for the EBC-406HM Emergency Locator

Transmitter:

5821-01-560-7879 -EBC 406HM with BB-12M Mounting

Bracket.

6135-01-560-7877 -GS-46 Lithium Battery Pack

5985-01-560-7878 -Antenna, ANT-406T

5340-01-560-7876 -BB-12M Mounting Bracket (Standard

Bracket)

5340-01-564-5623 -BB-15M Mounting Tray (Alternate

Bracket)

EMERGENCY BEACON CORPORATION

July 2022, Rev 8

FIGURE 1: EBC-406HM ELT WITH BB-12M BRACKET OUTLINE WITH HOLE PATTERN

FIGURE 2: EBC-406HM ELT WITH BB-15M TRAY OUTLINE WITH HOLE PATTERN

2.22

3.00

.75

3.00

ELT TEST PROCEDURE

.75.75

1.63

6.35

.75

1.35

TEST PROCEDURE

LABEL

B B

3.26

ON ARM TEST-

RESET

HANDHOLD LANYARD

FOR AVIATION

EMERGENCY USE ONLY

EBC-406HM

EMERGENCY BEACON CORP.

LATCH

3.83

ANT-406T ANTENNA

EMERGE

PAR

ANTENNA CLIP EBC-406HM ELT

2.85

ANTENNA LANYARD

17.19 ±0.19

7.09

GS-46

BATTERY

BB-12M

TSO-C126

emergency

beacon corp.

REPL TERY

BY__ ___________

MOUNTING

BRACKET

ID LABEL

BB-12M

MOUNTING

BRACKET

BATTERY REPLACE

LABEL

(6X) DIMPLED HOLES FOR

#10 SCREW CLEARANCE

SEE NOTE ABOVE

(2x) MOUNTING

SCREW ACCESS

SLOT

CONNECTOR &

BUZZER

HOUSING

TRANSMITTER

ID LABEL

SEE NOTE

ABOVE

REAR VIEW FRONT SIDE VIEW LEFT SIDE VIEW RIGHT SIDE VIEW

NOTE:

USE THREE MOUNTING

SCREWS. USE HOLE

PATTERN A OR B.

HOLE PATTERNS MATCH

LEGACY EBC-302HM

BRACKETS (BB-9).

EMERGENCY BEACON CORPORATION

July 2022, Rev 8

GS-46 ENVIRONMENTAL QUALIFICATION FORM

APPLICABLE SPECIFICATIONS: RTCA DO-227, RTCA DO-204, RTCA DO-160C

ENVIROMENTAL CATEGORY: 227/227/227/227/204/204/XXXXXXXXXXXXXXXX

TEST CONDITIONS

Section

DO-160C

Paragraph

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EMERGENCY BEACON CORPORATION EBC-406HM Instructions for use

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