W DOC AIRBUS | AMM A320F

Functional Test of the Air Data Module (ADM)

TASK 34-11-00-720-001-A
Functional Test of the Air Data Module (ADM)

CAUTION: TO PREVENT DAMAGE TO INSTRUMENTS, OBEY THESE PRECAUTIONS WHEN YOU DO THE TEST:
  • THE PRESSURES SET MUST NOT BE MORE THAN 1050 hPa (31 in Hg) OR LESS THAN 115 hPa (3.39 in Hg)
  • CHANGES IN STATIC AND TOTAL PRESSURES MUST NOT BE MORE THAN 6000 FEET/MINUTE
  • DO NOT SUDDENLY OPEN LINES TO AMBIENT AIR WHILE THE PRESSURE GENERATOR IS CONNECTED.
CAUTION: THE TOTAL PRESSURE IN THE PITOT SYSTEM MUST NEVER BE LESS THAN THE STATIC PRESSURE. THE DIFFERENCE BETWEEN THE PITOT AND THE STATIC PRESSURE CIRCUITS MUST NEVER BE MORE THAN 368 hPa (10.86 in Hg).
ZONE: 120
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
ARINC READER
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
TAPE - ADHESIVE
98D10103500001
1
COVER-STATIC PROBE
ALT34100001
1
PITOT AND STATIC TEST SET
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
120
AVIONICS COMPARTMENT
824
 C. Referenced Information
REFERENCE
DESIGNATION
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)
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 34-10-00-860-002-A
ADIRS Start Procedure
TASK 34-10-00-860-005-A
ADIRS Stop Procedure
TASK 52-41-00-410-002-A
Close the Avionics Compartment Doors after Access
F Static and Pitot Test Set
3. Job Set-up
Subtask 34-11-00-010-050-A
A. Get Access to the Avionics Compartment
   (1) Put the ACCESS PLATFORM 1M(3 FT) in position and open the access door 824.
Subtask 34-11-00-860-056-A
B. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the EIS start procedure (PFDs only) (Ref. AMM TASK 31-60-00-860-001).
   (3) Do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002).
   (4) On the center pedestral, on the SWITCHING panel 8VU, make sure that the AIR DATA selector switch is at NORM.
Subtask 34-11-00-865-050-A
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUANTI ICE/PROBES/PITOT/13DA1D02
122VUANTI ICE/PROBES/2/PITOT3DA2Y14
122VUANTI ICE/PROBES/2/STATIC5DA2Y11
122VUANTI ICE/PROBES/3/PITOT3DA3Z16
122VUANTI ICE/PROBES/3/STATIC5DA3Z14
122VUANTI ICE/PROBES/1/STATIC5DA1Z13
Subtask 34-11-00-480-050-A
D. Install the ground pressure generator and the Aeronautical Radio Incorporated (ARINC) reader.
   (1) Remove the slip-on covers from the static probes and the pitot probes.
   (2) Connect the static port of the ALT34100001 PITOT AND STATIC TEST SET to the static probes and/or the total probes on which you do the test.
F Static and Pitot Test Set
     (a) The static probes with the ADAPTER STATIC PROBE:
       1 For the CAPT circuit (Air Data/Inertial Reference Unit 1 (ADIRU 1)) and the F/O circuit (ADIRU 2):
  • 7DA1 zone 127 Station (STA) 8750 for the left static-pressure ADM (19FP5)
  • 7DA2 zone 127 STA 8700 for the left static-pressure ADM (19FP7).
And
  • 8DA1 zone 128 STA 9300 for the right static-pressure ADM (19FP4)
  • 8DA2 zone 128 STA 9350 for the right static-pressure ADM (19FP6).
     (b) The static probes with the ADAPTER STATIC PROBE:
       1 For the standby circuit (ADIRU 3):
  • 7DA3 zone 121 STA 4250 for the static pressure ADM (19FP8), or
  • 8DA3 zone 122 STA 4250 for the static pressure ADM (19FP8).
     (c) The pitot probes with the ADAPTER PITOT PROBE:
       1 For the CAPT circuit (ADIRU 1):
         a 9DA1 zone 125 STA 5500 for the total pressure ADM (19FP1).
       2 For the F/O circuit (ADIRU 2):
         a 9DA2 zone 126 STA 5500 for the total pressure ADM (19FP2).
       3 For the standby circuit (ADIRU 3):
         a 9DA3 zone 125 STA 5500 for the total pressure ADM (19FP3).
   (3) Seal the standby probes:
CAUTION: WHEN YOU SEAL THE DRAIN HOLE IN THE PITOT PROBE, DO NOT SEAL THE HOLE DIRECTLY WITH THE COLORED ADHESIVE TAPE. ALWAYS PUT A PIECE OF PLASTIC ON THE HOLE FIRST AND USE THE COLORED ADHESIVE TAPE TO ATTACH THE PLASTIC. IF YOU SEAL THE DRAIN HOLE DIRECTLY WITH THE ADHESIVE TAPE, THERE IS A RISK THAT SOME OF THE ADHESIVE WILL STAY ON THE HOLE AND COLLECT PARTICLES. THIS CAN SUBSEQUENTLY CAUSE BLOCKAGE OF THE HOLE AND THUS INCORRECT OPERATION OF THE PROBE.
     (a) Seal the drain holes of the pitot probes with a piece of plastic and the TAPE - ADHESIVE of very bright color.
     (b) Seal the opposite static probe of the standby ADM with the 98D10103500001 COVER-STATIC PROBE.
   (4) Start the ground pressure generator.
   (5) On relay plate 187VU, connect the ARINC READER to:
  • Connector 199VC (pins GG/HH) for the CAPT circuit (ADIRU 1)
  • Connector 199VC (pins <Y/<Z) for the standby circuit (ADIRU 3).
   (6) On relay plate 188VU, connect the ARINC READER to:
  • Connector 198VC (pins GG/HH) for the F/O circuit (ADIRU 2).
   (7) Start the ARINC READER.
4. Procedure
Subtask 34-11-00-720-050-A
A. Functional Test of the ADM
ACTION
RESULT
1.On the ground pressure generator, set a static pressure as given in the table below. The impacted pressure must stay at 0 (hPa or Kts).
NOTE: You can also set an other pressure value. The tolerance for the values read on the ARINC reader is the same as these indicated in the table below.
On the ARINC reader, compare the pressure values of the static and total ADM read on the following labels :
ADIRU 1
  • Label 242 (ADM 19FP1)
  • Label 176 (ADM 19FP5)
  • Label 177 (ADM 19FP4)
    ADIRU 2
  • Label 242 (ADM 19FP2)
  • Label 176 (ADM 19FP7)
  • Label 177 (ADM 19FP6)
    ADIRU 3
  • Label 242 (ADM 19FP3)
  • Label 245 (ADM 19FP8)
2.On the ground pressure generator, slowly decrease the pressure.
The rate of descent must not be more than 6000 ft/mn.
3.Stop the ground pressure generator.
The test procedure stops.
Pressure Setting
Altitude (approx.)
Pressure value from the ADM
836 hPa
5000 ft
836 +/- 0.3 hPa
690 hPa
10000 ft
690 +/- 0.3 hPa
460 hPa
20000 ft
460 +/- 0.3 hPa
300 hPa
30000 ft
300 +/- 0.3 hPa
196 hPa
39000 ft
196 +/- 0.3 hPa
5. Close-up
Subtask 34-11-00-080-050-A
A. Remove the Ground Pressure Generator
   (1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
   (2) Make sure that there is no remaining piece of plastic and/or adhesive tape on the pitot probes. Make sure that the pitot drain holes are serviceable.
Subtask 34-11-00-865-052-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUANTI ICE/PROBES/PITOT/13DA1D02
122VUANTI ICE/PROBES/2/PITOT3DA2Y14
122VUANTI ICE/PROBES/2/STATIC5DA2Y11
122VUANTI ICE/PROBES/3/PITOT3DA3Z16
122VUANTI ICE/PROBES/3/STATIC5DA3Z14
122VUANTI ICE/PROBES/1/STATIC5DA1Z13
Subtask 34-11-00-410-050-A
C. Close Access
   (1) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
   (2) Remove the access platform(s).
Subtask 34-11-00-860-051-A
D. Put the aircraft back to its initial configuration.
   (1) Install the slip on covers on the static probes and on the pitot probes.
   (2) Do the ADIRS Stop Procedure (Ref. AMM TASK 34-10-00-860-005).
   (3) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
   (4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:23:01 UTC
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