DOC AIRBUS | AMM A320FInstallation of the Standby Airspeed Indicator
TASK 34-21-26-400-001-A
Installation of the Standby Airspeed Indicator
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
B. Referenced Information
3. Job Set-up
Subtask 34-21-26-865-054-A ** ON A/C NOT FOR ALL
Subtask 34-21-26-420-050-A ** ON A/C NOT FOR ALL
Subtask 34-21-26-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:23:13 UTC
Installation of the Standby Airspeed Indicator
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 211 | COCKPIT |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 25-13-41-000-002-A | Removal of the Sidewall Panels |
| TASK 25-13-41-400-002-A | Installation of the Sidewall Panels |
| TASK 33-13-00-710-001-A | Operational Test of the Instrument and Panel Integral-Lighting |
Standby Airspeed IndicatorSubtask 34-21-26-865-054-A ** ON A/C NOT FOR ALL
A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 34-21-26-010-051-A ** ON A/C NOT FOR ALL 4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 122VU | LIGHTING/INSTL LT/MAIN INST/PNL AND/PED | 4LF | Y04 |
Subtask 34-21-26-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Standby Airspeed Indicator (9FN)
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking plugs from the line ends (4) and (5).
(4) Connect the quick-disconnect couplings (5) of the pressure lines (green and red) to the related connectors (4) of the standby airspeed indicator (2).
(5) Make sure that you can see the blue ring on the quick-disconnect couplings.
(6) Pull the quick-disconnect couplings to be sure that they are correctly attached.
(7) 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).
(8) Remove the blanking caps from the electrical connectors (3) and (6).
(9) Make sure that all the electrical connections are clean and in the correct condition.
(10) Connect the electrical connector (6) to the receptacle (3) of the standby airspeed indicator (2).
(11) Install the standby airspeed indicator (2) in its housing.
(12) Look behind the standby airspeed indicator and make sure that the position of the flexible hoses (static and total pressure lines) is satisfactory (no crushing, kinks, creases or folds).
(13) Tighten the screws (1).
Subtask 34-21-26-865-055-A ** ON A/C NOT FOR ALL (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking plugs from the line ends (4) and (5).
(4) Connect the quick-disconnect couplings (5) of the pressure lines (green and red) to the related connectors (4) of the standby airspeed indicator (2).
(5) Make sure that you can see the blue ring on the quick-disconnect couplings.
(6) Pull the quick-disconnect couplings to be sure that they are correctly attached.
(7) 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).
(8) Remove the blanking caps from the electrical connectors (3) and (6).
(9) Make sure that all the electrical connections are clean and in the correct condition.
(10) Connect the electrical connector (6) to the receptacle (3) of the standby airspeed indicator (2).
(11) Install the standby airspeed indicator (2) in its housing.
(12) Look behind the standby airspeed indicator and make sure that the position of the flexible hoses (static and total pressure lines) is satisfactory (no crushing, kinks, creases or folds).
(13) Tighten the screws (1).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 34-21-26-710-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 122VU | LIGHTING/INSTL LT/MAIN INST/PNL AND/PED | 4LF | Y04 |
C. Do the operational test of the instrument and panel integral lighting (Ref. AMM TASK 33-13-00-710-001).
5. Close-upSubtask 34-21-26-410-050-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Install the thermoformed cover on the center instrument panel.
(2) Install the sidewall panel 211LW (Ref. AMM TASK 25-13-41-400-002).
(3) Make sure that the work area is clean and clear of tools and other items.
(1) Install the thermoformed cover on the center instrument panel.
(2) Install the sidewall panel 211LW (Ref. AMM TASK 25-13-41-400-002).
(3) Make sure that the work area is clean and clear of tools and other items.