W DOC AIRBUS | AMM A320F

Downloading of the Cockpit Voice Recorder (CVR) Data Onboard with the L3AP Tool

TASK 23-71-00-600-802-A
Downloading of the Cockpit Voice Recorder (CVR) Data Onboard with the L3AP Tool

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
ZONE: 312
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 4M (13 FT)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
17TES0043
1
PORTABLE INTERFACE (PI)
17TES0078
1
L3AP RACK ADAPTOR CABLE
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
312
AFT FUSLG TAIL SECTION
312AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 23-71-00-710-001-A
Operational Check of CVR and CVR-Channel Recording
TASK 23-71-00-710-002-A
Operational Test of the CVR Recording Logic Including Time Delay Relay
TASK 23-71-00-710-002-B
Operational Check of CVR Recording Logic Including Time Delay Relay
TASK 23-71-35-000-001-A
Removal of the Cockpit Voice Recorder (CVR)
TASK 23-71-35-400-001-A
Installation of the Cockpit Voice Recorder (CVR)
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)
F CVR Data Downloading with the L3AP Tool
3. Job Set-up
Subtask 23-71-00-860-071-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 23-71-00-010-052-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Put the ACCESS PLATFORM 4M (13 FT) in position at zone 312.
   (2) Open accessory compartment access-door 312AR.
Subtask 23-71-00-865-061-A ** ON A/C NOT FOR ALL
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY2RKE14
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY23RKE14
4. Procedure
Subtask 23-71-00-610-050-A ** ON A/C NOT FOR ALL
A. Connection of the L3AP Tool
   (1) Remove the CVR (1) from the CVR rack (2) (Ref. AMM TASK 23-71-35-000-001).
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Connect the electrical connector (4) of the 17TES0078 L3AP RACK ADAPTOR CABLE to the receptacle (3) of the CVR (1).
   (4) Connect the electrical connector (5) of the 17TES0078 L3AP RACK ADAPTOR CABLE to the receptacle (6) of the CVR rack (2).
   (5) Turn the label (7) to get access to the receptacle (8) of the CVR (1).
   (6) Connect the electrical connector (9) of the 17TES0043 PORTABLE INTERFACE (PI) (11) to the receptacle (8) of the CVR (1).
   (7) Tighten the captive screws (10).
Subtask 23-71-00-865-063-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY2RKE14
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY23RKE14
Subtask 23-71-00-860-073-B ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) On the overhead panel, on the RCDR section of panel 21VU, on the RCDR/GND CTL pushbutton switch, make sure that the ON legend is on.
Subtask 23-71-00-610-070-A ** ON A/C NOT FOR ALL
D. Downloading of the CVR Data with the Portable Interface
   (1) Obey the supplier data-extraction procedure.
NOTE: For more information about the portable interface tool, you can refer to the Tool and Equipment Manual (TEM).
Subtask 23-71-00-865-065-A ** ON A/C NOT FOR ALL
E. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY2RKE14
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY23RKE14
Subtask 23-71-00-610-054-A ** ON A/C NOT FOR ALL
F. Disconnection of the L3AP Tool
   (1) Loosen the captive screws (10).
   (2) Disconnect the electrical connector (9) of the 17TES0043 PORTABLE INTERFACE (PI) (11) from the receptacle (8) of the CVR (1).
   (3) Turn the label (7) to its initial position.
   (4) Disconnect the electrical connector (4) of the 17TES0078 L3AP RACK ADAPTOR CABLE from the receptacle (3) of the CVR (1).
   (5) Disconnect the electrical connector (5) of the 17TES0078 L3AP RACK ADAPTOR CABLE from the receptacle (6) of the CVR rack (2).
   (6) Install the CVR (1) on the CVR rack (2) (Ref. AMM TASK 23-71-35-400-001).
Subtask 23-71-00-865-066-A ** ON A/C NOT FOR ALL
G. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY2RKE14
** ON A/C NOT FOR ALL
49VUCOM/CVR/SPLY23RKE14
Subtask 23-71-00-860-074-B ** ON A/C NOT FOR ALL
H. De-energization of the CVR
   (1) In the cockpit, on overhead control and indicating panel 21VU, release the RCDR/GND CTL pushbutton switch (the blue ON legend is off).
Subtask 23-71-00-710-057-A ** ON A/C NOT FOR ALL
I. Operational Tests
   (1) Do the operational test of the CVR and the CVR channel recording (Ref. AMM TASK 23-71-00-710-001).
   (2) Do the operational test of the CVR recording logic with the time delay relay (Ref. AMM TASK 23-71-00-710-002).
5. Close-up
Subtask 23-71-00-410-052-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 accessory compartment access-door 312AR.
   (3) Remove the access platform(s).
Subtask 23-71-00-860-072-A ** ON A/C NOT FOR ALL
B. Put the aircraft back to its initial configuration.
   (1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:12:18 UTC
"WTRUIB" 2025