DOC AIRBUS | AMM A320FDiscard ULB Battery
TASK 23-71-35-920-001-A
Discard ULB Battery
Refer to the MPD TASK: 237135-01
DISCARD ULB BATTERY
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 23-71-35-020-051-B ** ON A/C NOT FOR ALL
Subtask 23-71-35-410-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:50:59 UTC
Discard ULB Battery
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobRefer to the MPD TASK: 237135-01
DISCARD ULB BATTERY
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 312 | AFT FUSLG TAIL SECTION |
| 312AR |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 23-71-00-720-001-A | Operational Check of the Underwater Locator Beacon (ULB) |
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
Underwater Locator Beacon (ULB)NOTE: Make sure that a new Underwater Locator Beacon (ULB) is available for ULB replacement.
Subtask 23-71-35-861-051-A ** ON A/C NOT FOR ALL A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 23-71-35-010-051-A ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
B. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at zone 312.
(2) Open access door 312AR.
4. Procedure(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at zone 312.
(2) Open access door 312AR.
Subtask 23-71-35-020-051-B ** ON A/C NOT FOR ALL
A. Removal of the ULB from the Cockpit Voice Recorder (CVR)
(1) For CVR Part Number (P/N) 980-6020-XXX (Serial Number (S/N) 3499 and less) or P/N 980-6022-XXX (S/N 2199 and less):
(a) Remove the screws (1) from the clamps (2).
(b) Remove the ULB (3) and the clamps (2) from the mounting cradle (4).
1 If ULB type DK 100 is installed, send the ULB to the vendor to replace the battery.
(2) For CVR P/N 980-6020-XXX (S/N 3500 and more), P/N 980-6022-XXX (S/N 2200 and more) or P/N 980-6032-XXX:
(a) Remove the screws (1) from the clamps (2).
(b) Remove the ULB (3) from the clamps (2).
1 If ULB type DK 100 is installed, send the ULB to the vendor to replace the battery.
Subtask 23-71-35-020-051-CU ** ON A/C NOT FOR ALL (1) For CVR Part Number (P/N) 980-6020-XXX (Serial Number (S/N) 3499 and less) or P/N 980-6022-XXX (S/N 2199 and less):
(a) Remove the screws (1) from the clamps (2).
(b) Remove the ULB (3) and the clamps (2) from the mounting cradle (4).
1 If ULB type DK 100 is installed, send the ULB to the vendor to replace the battery.
(2) For CVR P/N 980-6020-XXX (S/N 3500 and more), P/N 980-6022-XXX (S/N 2200 and more) or P/N 980-6032-XXX:
(a) Remove the screws (1) from the clamps (2).
(b) Remove the ULB (3) from the clamps (2).
1 If ULB type DK 100 is installed, send the ULB to the vendor to replace the battery.
A. Removal of the ULB from the Cockpit Voice Recorder (CVR)
(1) Remove the screws (3) from the clamps (2).
(2) Remove the ULB (4) and the clamps (2) from the mounting cradle (1).
(a) If ULB type DK 100 is installed, send the ULB to the vendor to replace the battery.
Subtask 23-71-35-960-050-A ** ON A/C NOT FOR ALL (1) Remove the screws (3) from the clamps (2).
(2) Remove the ULB (4) and the clamps (2) from the mounting cradle (1).
(a) If ULB type DK 100 is installed, send the ULB to the vendor to replace the battery.
B. Discard and replacement of the ULB battery
(1) Send the related ULB battery to the workshop for discard and replace it with the new ULB battery.
Subtask 23-71-35-420-051-B ** ON A/C NOT FOR ALL (1) Send the related ULB battery to the workshop for discard and replace it with the new ULB battery.
C. Installation of the ULB on the CVR
(1) For CVR P/N 980-6020-XXX (S/N 3499 and less) or P/N 980-6022-XXX (S/N 2199 and less):
(a) Make sure that the water sensitive switch of the ULB (3) is clean.
(b) Install the ULB (3) in the clamps (2).
(c) Put the ULB (3) and the clamps (2) in their installation position on the mounting cradle (4) and install the screws (1).
(d) Turn the ULB (3) until you can read the battery replacement date.
(e) Tighten the screws (1).
(2) For CVR P/N 980-6020-XXX (S/N 3500 and more), P/N 980-6022-XXX (S/N 2200 and more) or P/N 980-6032-XXX:
(a) Make sure that the water sensitive switch of the ULB (3) is clean.
(b) Install the ULB (3) in the clamps (2).
(c) Turn the ULB (3) until you can read the battery replacement date.
(d) Install the screws (1).
(e) Tighten the screws (1).
Subtask 23-71-35-420-051-CU ** ON A/C NOT FOR ALL (1) For CVR P/N 980-6020-XXX (S/N 3499 and less) or P/N 980-6022-XXX (S/N 2199 and less):
(a) Make sure that the water sensitive switch of the ULB (3) is clean.
(b) Install the ULB (3) in the clamps (2).
(c) Put the ULB (3) and the clamps (2) in their installation position on the mounting cradle (4) and install the screws (1).
(d) Turn the ULB (3) until you can read the battery replacement date.
(e) Tighten the screws (1).
(2) For CVR P/N 980-6020-XXX (S/N 3500 and more), P/N 980-6022-XXX (S/N 2200 and more) or P/N 980-6032-XXX:
(a) Make sure that the water sensitive switch of the ULB (3) is clean.
(b) Install the ULB (3) in the clamps (2).
(c) Turn the ULB (3) until you can read the battery replacement date.
(d) Install the screws (1).
(e) Tighten the screws (1).
C. Installation of the ULB on the CVR
(1) Make sure that the water sensitive switch of the ULB (4) is clean.
(2) Install the ULB (4) in the clamps (2).
(3) Put the ULB (4) and the clamps (2) in their installation position on the mounting cradle (1) and install the screws (3).
(4) Turn the ULB (4) until you can read the battery replacement date.
(5) Tighten the screws (3).
Subtask 23-71-35-720-050-A ** ON A/C NOT FOR ALL 5. Close-up(1) Make sure that the water sensitive switch of the ULB (4) is clean.
(2) Install the ULB (4) in the clamps (2).
(3) Put the ULB (4) and the clamps (2) in their installation position on the mounting cradle (1) and install the screws (3).
(4) Turn the ULB (4) until you can read the battery replacement date.
(5) Tighten the screws (3).
Subtask 23-71-35-410-052-A ** 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) Close access door 312AR.
(3) Remove the access platform(s).
Subtask 23-71-35-862-052-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 312AR.
(3) Remove the access platform(s).
B. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).