W DOC AIRBUS | AMM A320F

Operational Check of ELT System by Manual Activation

TASK 25-65-00-710-001-A
Operational Check of ELT System by Manual Activation

ZONE: 200
FIN: 110MX ** ON A/C NOT FOR ALL
1. Reason for the Job
Refer to the MPD TASK: 256535-01
OPERATIONAL CHECK OF ELT SYSTEM BY MANUAL ACTIVATION
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
200
UPPER HALF FUSELAGE
261BC
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-42-00-861-001-A
Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
TASK 25-23-42-000-002-A
Removal of the Ceiling Panels - Aft Utility Area
TASK 25-23-42-400-002-A
Installation of the Ceiling Panels - Aft Utility Area
F Operational Test - Component Location ** ON A/C NOT FOR ALL
F Operational Test - Component Location ** ON A/C NOT FOR ALL
F Operational Test - Component Location ** ON A/C NOT FOR ALL
F Operational Test - Component Location ** ON A/C NOT FOR ALL
F Operational Test - Component Location ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 25-65-00-861-054-A ** ON A/C NOT FOR ALL
A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 25-65-00-861-054-K ** ON A/C NOT FOR ALL
A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 25-65-00-010-055-K ** ON A/C NOT FOR ALL
B. Get access to the ELT 110MX
   (1) Remove the ceiling panel 261BC (Ref. AMM TASK 25-23-42-000-002).
4. Procedure
Subtask 25-65-00-710-050-E ** ON A/C NOT FOR ALL
CAUTION: DO THE TEST DURING THE FIRST FIVE MINUTES AFTER THE HOUR UTC (UNIVERSAL CO-ORDINATED TIME), BETWEEN XX:00 HOURS AND XX:05 HOURS. THIS IS TO PREVENT UNWANTED RESCUE OPERATIONS.
A. Operational Test
F Operational Test - Component Location ** ON A/C NOT FOR ALL
F Operational Test - Component Location ** ON A/C NOT FOR ALL
   (1) In the cockpit, prevent damage to the Emergency Locator Transmitter (ELT) electronics:
CAUTION: DO NOT DO AN ANNUNCIATOR LIGHT TEST DURING THE TEST OF THE EMERGENCY LOCATOR TRANSMITTER (ELT) SYSTEM. IF YOU DO, YOU CAN CAUSE DAMAGE TO AN INTERNAL RELAY OF THE ELT.
     (a) On panel 25VU, make sure that the ANN LT switch (1) is not set to TEST during the operational test.

CAUTION: DO NOT DO THE EMERGENCY LOCATOR TRANSMITTER (ELT) TEST FOR LONGER THAN 50 SECONDS. IF YOU DO, THE ELT WILL SEND DISTRESS SIGNALS AND RESCUE OPERATIONS WILL START.
   (2) Use the Universal Time Coordinated (UTC) and do the test.

ACTION
RESULT
1.On remote control panel 111MX:
  • Set the ON-ARMED-TEST/RESET switch (4) to TEST/RESET.
NOTE: The ON-ARMED-TEST/RESET switch (4) automatically goes back to ARMED. The self-test mode is automatically set to 5 seconds.
  • If test results are unsatisfactory, do test up to three times again.
On remote control panel 111MX:
  • The ON/TEST indicator (3) flashes one time.
  • After approximately 3 seconds, on the ON/TEST indicator (3), one long flash confirms a satisfactory test result.
NOTE: If the ON/TEST indicator (3) shows a sequence of short flashes, the test result is unsatisfactory.

NOTE: You can ignore the indications and the sounds that occur at these locations:
On ELT 110MX:
  • The buzzer operates during the full self-test procedure.
  • The red indicator flashes one time.
  • When the test is completed, on the red indicator, one long flash confirms a satisfactory test result.
On panel 108VU:
  • ELT indicator 113MX comes on for 5 seconds.
In the nose landing-gear well:
  • Mechanic call horn 15WC operates for 5 seconds.
Subtask 25-65-00-710-050-K ** ON A/C NOT FOR ALL
A. BITE Test
F Operational Test - Component Location ** ON A/C NOT FOR ALL
   (1) Prevent damage to the ELT electronics:
CAUTION: DO NOT DO AN ANNUNCIATOR LIGHT TEST DURING THE TEST OF THE EMERGENCY LOCATOR TRANSMITTER (ELT) SYSTEM. IF YOU DO, YOU CAN CAUSE DAMAGE TO AN INTERNAL RELAY OF THE ELT.
     (a) On panel 25VU, make sure that the ANN LT switch (1) is not on the TEST position.
     (b) Put a WARNING NOTICE(S) on panel 25VU to tell persons not to set the ANN LT switch (1) to the TEST position during the BITE test.
CAUTION: DO NOT DO THE EMERGENCY LOCATOR TRANSMITTER TEST FOR LONGER THAN 30 SECONDS. IF YOU DO, THE ELT WILL TRANSMIT DISTRESS SIGNALS AND RESCUE OPERATIONS WILL START.
   (2) Do the test during the first five minutes after the hour, between XX:00 hours and XX:05 hours.

NOTE: It is necessary to use Universal Time Coordinated (UTC) time for the test.
ACTION
RESULT
1.On remote-control panel (RCP) 111MX:
On remote-control panel (RCP) 111MX:
  • Make sure that the ON/ARMED switch (4) is set to the ARMED position. If necessary, lift the switch guard (5).
NOTE: The ARMED position is the usual position for the ON/ARMED switch.

- Push the TEST/RESET button (2) for approximately 2s.
- The indicator (3) flashes two times and goes off for 6s.
NOTE: If test results are unsatisfactory, do test up to three times again.
NOTE: You can ignore the visual indications and the sounds that occur at these other locations:
  • At ELT 110MX (RED indicator and buzzer).
  • On panel 108VU (ELT indicator 113MX).
  • In the nose-landing-gear well (mechanic call-horn 15WC).
  • If necessary, close the switch guard (5).

Subtask 25-65-00-710-050-O ** ON A/C NOT FOR ALL
A. Operational Test
F Operational Test - Component Location ** ON A/C NOT FOR ALL
CAUTION: DO THE TEST DURING THE FIRST FIVE MINUTES AFTER THE HOUR UTC (UNIVERSAL CO-ORDINATED TIME), BETWEEN XX:00 HOURS AND XX:05 HOURS. THIS IS TO PREVENT UNWANTED RESCUE OPERATIONS.
CAUTION: DO NOT DO AN ANNUNCIATOR LIGHT TEST DURING THE TEST OF THE EMERGENCY LOCATOR TRANSMITTER (ELT) SYSTEM. IF YOU DO, YOU CAN CAUSE DAMAGE TO AN INTERNAL RELAY OF THE ELT.
   (1) In the cockpit prevent damage to the ELT electronics:
NOTE: This self-test process must not be interrupted. If it is not complete for any reason ,do a new complete self-test.
NOTE: During the self-test, the horn 15WC and the indicator light 113MX are on.
     (a) Make sure that on the panel 25VU the ANN LT switch (1) is not set to the TEST position during the operational test.

ACTION
RESULT
1.On the remote-control panel (RCP) 111MX:
On the remote-control panel (RCP) 111MX:
  • Lift the switch guard (5).
  • Make sure that the toggle switch (4) on the RCP is in the ARMED position.
  • Make sure that the toggle switch (7) on the ELT is in the ARMED position.

  • Start the self-test from the TEST/RESET button (2) until the LED (3) starts to flash.
  • The LED (3) flashes two times.
  • Make sure that the LED (3) light goes off for approximately 6 seconds.

After the self-test process, on the ELT shows:
  • 10 seconds permanent illumination of the LED (6) for correct operation.

At the cockpit loudspeaker:
  • You can hear an emergency signal on the 121.5 MHz frequency.

    On the panel 108VU:
  • The ELT indicator 113MX comes on continuously.

    In the nose landing gear well:
  • The mechanic call-horn 15WC operates continuously.

  • After approximately 20 seconds the indications and the sounds stop.
  • Close the switch guard (5).

Subtask 25-65-00-710-050-R ** ON A/C NOT FOR ALL
A. Operational Test
F Operational Test - Component Location ** ON A/C NOT FOR ALL
CAUTION: WHEN YOU DO THE TEST, HOLD THE REMOTE CONTROL PANEL TOGGLE SWITCH IN THE TEST/RESET POSITION FOR 1-3 SECONDS. DO NOT HOLD THIS SWITCH IN THE TEST/RESET POSITION FOR LESS THAN ONE SECOND OR FOR MORE THAN THREE SECONDS. IF YOU DO, THE EMERGENCY LOCATOR TRANSMITTER WILL STAY IN THE TRANSMIT STATE AND THE TEST WILL NOT OCCUR.
   (1) In the cockpit, prevent damage to the ELT electronics:
CAUTION: DO NOT DO AN ANNUNCIATOR LIGHT TEST DURING THE TEST OF THE EMERGENCY LOCATOR TRANSMITTER (ELT) SYSTEM. IF YOU DO, YOU CAN CAUSE DAMAGE TO AN INTERNAL RELAY OF THE ELT.
     (a) Make sure that on the panel 25VU the ANN LT switch (1) is not set to the TEST position during the operational test.

CAUTION: DO NOT DO THE EMERGENCY LOCATOR TRANSMITTER (ELT) TEST FOR LONGER THAN 50 SECONDS. IF YOU DO, THE ELT WILL SEND DISTRESS SIGNALS AND RESCUE OPERATIONS WILL START.
CAUTION: DO NOT DO THE EMERGENCY LOCATOR TRANSMITTER (ELT) TEST FOR LONGER THAN 50 SECONDS. IF YOU DO, THE ELT WILL SEND DISTRESS SIGNALS AND RESCUE OPERATIONS WILL START.
   (2) Do the test during the first five minutes after the hour, between XX:00 hours and XX:05 hours.
NOTE: It is necessary to use Universal Time Coordinated (UTC) time for the test.

ACTION
RESULT
1.On the Remote Control Panel (RCP) 111MX:
On the RCP 111MX:
  • Lift the switch guard (5).

  • Set the ON-ARMED-TEST/RESET switch (4) to the ON position for approximately 10 seconds.
  • The indicator (3) slowly flashes continuously.

At the cockpit loudspeaker:
  • If the radio-management panel is set to 121.5 MHz frequency and the cockpit loudspeaker is set to maximum, you can hear the distress signal.
NOTE: You can ignore the indications and the sounds that occur at these other locations:
  • At the ELT 110MX (indicator slowly flashes continuously)
  • On the panel 108VU (ELT indicator 113MX comes on continuously)
  • In the nose-landing-gear well (mechanic call-horn 6WC operates continuously).
  • Set the ON-ARMED-TEST/RESET switch (4) to the TEST/RESET position for 1-3 seconds.
On the RCP 111MX:
  • The indicator (3) flashes 3 times.
NOTE: If a NAIM 144MX with a NULL message protocol is installed, each indicator flashes four times.

NOTE: The ELT operation is stopped, a BITE test is completed, and the ELT is put back to automatic mode. You can ignore the indications and the sounds that occur at the other locations during the BITE test.
  • Set the ON-ARMED-TEST/RESET switch (4) to the ARMED position.
On the RCP 111MX:
  • The indicator (3) goes off.

At the cockpit loudspeaker:
  • The distress signal stops.
NOTE: The sounds and indications at the other locations stop.
  • Close the switch guard (5).

5. Close-up
Subtask 25-65-00-410-056-K ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the ceiling panel 261BC (Ref. AMM TASK 25-23-42-400-002).
   (3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 25-65-00-862-054-A ** ON A/C NOT FOR ALL
B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
Subtask 25-65-00-862-054-K ** ON A/C NOT FOR ALL
B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
[Rev.10 from 2021] 2026.04.01 04:04:32 UTC
"Aviabrain" 2025