DOC AIRBUS | AMM A320FFlushing of the Principal Static Pressure Lines
TASK 34-10-00-170-002-A
Flushing of the Principal Static Pressure Lines
1. Reason for the Job
Self explanatory
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 34-10-00-170-051-A
Subtask 34-10-00-410-060-A
[Rev.10 from 2021]
2026.04.01 00:58:00 UTC
Flushing of the Principal Static Pressure Lines
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | NITROGEN COMPRESSED SOURCE 2 BAR (29 PSI) - DRY |
| 98D34103002000 | 1 | ADAPTERS - AIR DATA SYSTEM FLUSHING |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 120 | AVIONICS COMPARTMENT |
| 824 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 10-11-00-555-013-A | Installation of the Aircraft Protection Equipment |
| TASK 10-11-00-555-014-A | Removal of the Aircraft Protection Equipment |
| TASK 34-13-00-790-002-A | Leak Test of the Principal Static and Total Air Data System |
| TASK 52-41-00-010-002-A | Open the Avionics Compartment Doors for Access |
| TASK 52-41-00-410-002-A | Close the Avionics Compartment Doors after Access |
Routing of the Pressure LinesNOTE: The hose couplings are self-sealing.
Subtask 34-10-00-010-060-A A. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 1M(3 FT) in position below access door 824, at zone 128.
(2) Open access door 824 (Ref. AMM TASK 52-41-00-010-002).
Subtask 34-10-00-860-052-A (1) Put the ACCESS PLATFORM 1M(3 FT) in position below access door 824, at zone 128.
(2) Open access door 824 (Ref. AMM TASK 52-41-00-010-002).
B. Connect the Dry Nitrogen Source
(1) Remove the aircraft protection equipment, if installed (Ref. AMM TASK 10-11-00-555-014).
(2) Disconnect the quick-disconnect coupling from the ADM 19FP4 or 19FP5 (19FP6 or 19FP7).
(3) Connect a 98D34103002000 ADAPTERS - AIR DATA SYSTEM FLUSHING 3-pin adapter (98D34103002100) to the static pressure hose. Then connect it to the NITROGEN COMPRESSED SOURCE 2 BAR (29 PSI) - DRY.
(4) Attach the hose to prevent movement.
4. Procedure(1) Remove the aircraft protection equipment, if installed (Ref. AMM TASK 10-11-00-555-014).
(2) Disconnect the quick-disconnect coupling from the ADM 19FP4 or 19FP5 (19FP6 or 19FP7).
(3) Connect a 98D34103002000 ADAPTERS - AIR DATA SYSTEM FLUSHING 3-pin adapter (98D34103002100) to the static pressure hose. Then connect it to the NITROGEN COMPRESSED SOURCE 2 BAR (29 PSI) - DRY.
(4) Attach the hose to prevent movement.
Subtask 34-10-00-170-051-A
A. Flushing of the Static Pressure Line
(1) Blow the gas into the hose at a pressure of 2 -0.35 bar or +0.35 bar (29 -5 psi or +5 psi) for approximately 1 minute.
(2) Make sure that there is no contamination in the pressurized gas at the outlet of the L or R static probe 1 (L or R static probe 2).
(3) Stop the flow of gas.
(4) Disconnect the dry nitrogen source.
(5) Remove the 3-pin adapter .
(6) Release the hose.
(7) Connect the quick-disconnect coupling to the ADM 19FP4 or 19FP5 (19FP6 or 19FP7).
(8) Make sure that you can see the blue ring on the quick-disconnect coupling.
(9) Pull the quick-disconnect coupling to be sure that it is correctly attached.
(10) Make sure that the quick-disconnect coupling is correctly engaged (the pin located on the quick-disconnect male part is fully engaged into the groove located in the quick-disconnect female part).
Subtask 34-10-00-170-054-A (1) Blow the gas into the hose at a pressure of 2 -0.35 bar or +0.35 bar (29 -5 psi or +5 psi) for approximately 1 minute.
(2) Make sure that there is no contamination in the pressurized gas at the outlet of the L or R static probe 1 (L or R static probe 2).
(3) Stop the flow of gas.
(4) Disconnect the dry nitrogen source.
(5) Remove the 3-pin adapter .
(6) Release the hose.
(7) Connect the quick-disconnect coupling to the ADM 19FP4 or 19FP5 (19FP6 or 19FP7).
(8) Make sure that you can see the blue ring on the quick-disconnect coupling.
(9) Pull the quick-disconnect coupling to be sure that it is correctly attached.
(10) Make sure that the quick-disconnect coupling is correctly engaged (the pin located on the quick-disconnect male part is fully engaged into the groove located in the quick-disconnect female part).
B. After the Flushing Procedure
(a) If you must do two checks of the quick-disconnect coupling:
(2) Install the aircraft protection equipment, if necessary (Ref. AMM TASK 10-11-00-555-013).
5. Close-upWARNING:
IF ONE OR MORE QUICK DISCONNECT COUPLINGS ARE DISCONNECTED IN ONE SYSTEM, MAKE SURE THAT A SECOND QUALIFIED MECHANIC DOES A VISUAL INSPECTION OF THE QUICK-DISCONNECT COUPLING CONNECTIONS. THE TWO MECHANICS MUST SIGN OFF THE JOB.
********************
IF ONE OR MORE QUICK-DISCONNECT COUPLINGS ARE DISCONNECTED IN TWO OR MORE SYSTEMS, MAKE SURE THAT A SECOND QUALIFIED MECHANIC DOES A VISUAL INSPECTION OF THE QUICK-DISCONNECT COUPLING CONNECTIONS AND DOES THE LEAK TEST. THE TWO MECHANICS MUST SIGN OFF THE JOB.
(1) Refer to the table that follows to know if you must do two checks of the quick-disconnect couplings and/or the leak test:| Condition | Two Checks of the Quick-Disconnect Couplings | Leak Test |
| One static circuit flushing on ADR 1 or ADR 2 circuit | Yes | No |
| Two static circuit flushing on ADR 1 and ADR 2 circuits | Yes | Yes |
| Total and static circuit flushing on ADR 3 and ISIS circuits | Yes | Yes |
- Tell a second qualified mechanic to do a visual inspection of the quick-disconnect coupling (the signature of the two mechanics is mandatory).
- Make sure that the quick-disconnect coupling is correctly engaged (the pin located on the quick-disconnect male part must be fully engaged into the groove in the quick-disconnect female part).
(2) Install the aircraft protection equipment, if necessary (Ref. AMM TASK 10-11-00-555-013).
Subtask 34-10-00-410-060-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).