W DOC AIRBUS | AMM A320F

Installation of the Differential Pressure Sensor

TASK 21-51-11-400-001-A
Installation of the Differential Pressure Sensor

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
NOTE: The procedure is the same for the pressure sensors 9HB and (10HB).
FIN: 10HB ** ON A/C NOT FOR ALL
FIN: 23HB2 ** ON A/C NOT FOR ALL
FIN: 24HB2 ** ON A/C NOT FOR ALL
FIN: 9HB ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
Torque wrench: range to between 0.11 and 0.09 m.daN (9.73 and 7.96 lbf.in ) T
No specific
Torque wrench: range to between 0.38 and 0.32 m.daN (33.63 and 28.32 lbf.in ) T
FOR [10HB] (P1 FLOW SENSOR)
No specific
Torque wrench: range to between 1.05 and 0.95 m.daN (92.92 and 84.07 lbf.in ) T
FOR [9HB] (P2 FLOW SENSOR)
No specific
Torque wrench: range to between 1.05 and 0.95 m.daN (92.92 and 84.07 lbf.in ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.03FAB1)
Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.03PBB1)
Lubricant-Anti Seize High Temp. -
FOR [10HB] (P1 FLOW SENSOR)
(Material No.03PBB1)
Lubricant-Anti Seize High Temp. -
FOR [9HB] (P2 FLOW SENSOR)
(Material No.03PBB1)
Lubricant-Anti Seize High Temp. -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [10HB] (P1 FLOW SENSOR)
191KB
FOR [23HB2] (SENSOR-DELTA PRESS,PACK 1)
191KB
FOR [24HB2] (SENSOR-DELTA PRESS,PACK 2)
192KB
FOR [9HB] (P2 FLOW SENSOR)
192KB
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
12
PACKING-PREFORMED
AIPC 21-51-51-03-040
11
PACKING-PREFORMED
AIPC 21-51-51-03-050
8
WASHER
AIPC 21-51-51-03-090
12
PACKING-PREFORMED
AIPC 21-51-51-04-040
11
PACKING-PREFORMED
AIPC 21-51-51-04-050
8
WASHER
AIPC 21-51-51-04-090
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 12-33-21-618-001-A-01
Pre-conditioning through the HP Ground Connection
TASK 12-33-21-618-001-A-02
Pre-conditioning with the APU
TASK 21-51-00-710-002-A
Operational Test of the Flow Control and Indicating System
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 53-35-13-000-002-A
Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A
Installation of the Quick-Release Access Panels on the Belly Fairing Structure
F Pressure Sensor ** ON A/C NOT FOR ALL
F Pressure Sensor - Component Location ** ON A/C NOT FOR ALL
FOR [10HB] (P1 FLOW SENSOR)
TASK 20-28-00-912-802-A
Electrical Bonding - General Maintenance Procedure
FOR [9HB] (P2 FLOW SENSOR)
TASK 20-28-00-912-802-A
Electrical Bonding - General Maintenance Procedure
3. Job Set-up
Subtask 21-51-11-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Make sure that:
     (a) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
     (b) The access panel is removed (Ref. AMM TASK 53-35-13-000-002),
       1 FOR [10HB] (P1 FLOW SENSOR)
191KB,
       2 FOR [9HB] (P2 FLOW SENSOR)
192KB.
Subtask 21-51-11-860-050-B ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Make sure that:
     (a) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
     (b) The access panel is removed (Ref. AMM TASK 53-35-13-000-002),
       1 FOR [23HB2] (SENSOR-DELTA PRESS,PACK 1)
191KB,
       2 FOR [24HB2] (SENSOR-DELTA PRESS,PACK 2)
192KB.
Subtask 21-51-11-865-051-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 9HB (P2 FLOW SENSOR)
122VUAIR COND/PACK TEMP/CTL SYS1/2/115VAC21HHW22
122VUAIR COND/PACK TEMP/CTL SYS1/2/28VDC23HHW21
122VUAIR COND/PACK TEMP CTL SYS2/2/28VDC24HHY21
122VUAIR COND/PACK TEMP CTL SYS2/2/115VAC22HHY20
FOR FIN: 10HB (P1 FLOW SENSOR)
122VUAIR COND/PACK TEMP/CTL SYS1/1/115VAC1HHX22
122VUAIR COND/PACK TEMP/CTL SYS1/1/28VDC3HHX21
122VUAIR COND/PACK TEMP CTL SYS2/1/28VDC4HHY19
122VUAIR COND/PACK TEMP CTL SYS2/1/115VAC2HHY18
** ON A/C NOT FOR ALL
FOR FIN: 23HB2 (SENSORDELTA PRESS,PACK 1)
49VUAIR COND/TEMP CTL/SYS 1 CHAN B/28VDC52HHD08
122VUAIR COND/TEMP CTL SYS 1/CHAN A/115VAC49HHX22
122VUAIR COND/TEMP CTL SYS 1/CHAN A/28VDC51HHX21
122VUAIR COND/TEMP CTL SYS 1/CHAN B/115VAC50HHY18
FOR FIN: 24HB2 (SENSORDELTA PRESS,PACK 2)
122VUAIR COND/TEMP CTL SYS 2/CHAN A/115VAC53HHW22
122VUAIR COND/TEMP CTL SYS 2/CHAN A/28VDC55HHW21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/28VDC56HHY21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/115VAC54HHY20
4. Procedure
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
Subtask 21-51-11-420-050-C ** ON A/C NOT FOR ALL
A. Installation of the Pressure Sensor
F Pressure Sensor ** ON A/C NOT FOR ALL
   (1) FOR [10HB] (P1 FLOW SENSOR)
     (a) Put the clamps (2) in position on the pressure sensor (12).
     (b) Put the clamps (2) and the pressure sensor (12) in position on the bracket (13) and install the washers (3) and the screws (4).
NOTE: Make sure that the sense-line connection union (6) faces in the correct direction.
     (c) Remove the blanking plugs from the connectors.
     (d) Protection of the Sense-Line Connectors
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
       1 Apply a small amount of Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads of the sense-line connectors (1) and (5).
     (e) Connect the sense line connectors (1) and (5).
     (f) TORQUE the sense line connectors (1) and (5) to between 1.05 and 0.95 m.daN (92.92 and 84.07 lbf.in ) T.
     (g) Put the bonding strap (9) in position and install the screw (8), the washer (10)and the nut (11) (Ref. AMM TASK 20-28-00-912-802).
     (h) Remove the blanking caps from the electrical connectors.
     (i) Make sure that all the electrical connections are clean and in the correct condition.
     (j) Connect the electrical connector (7).
     (k) Make sure that the work area is clean and clear of tools and other items.
   (2) FOR [9HB] (P2 FLOW SENSOR)
     (a) Put the clamps (22) in position on the pressure sensor (29).
     (b) Put the clamps (22) and the pressure sensor (29) in position on the bracket (23) and install the washers (30) and the screws (31).
NOTE: Make sure that the sense-line connection union (33) faces in the correct direction.
     (c) Remove the blanking plugs from the connectors.
     (d) Protection of the Sense-Line Connectors
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
       1 Apply a small amount of Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads of the sense-line connectors (21) and (32).
     (e) Connect the sense line connectors (21) and (32).
     (f) TORQUE the sense line connectors (21) and (32) to between 1.05 and 0.95 m.daN (92.92 and 84.07 lbf.in ) T.
     (g) Put the bonding strap (26) in position and install the screw (25) the washer (28) and the nut (28) (Ref. AMM TASK 20-28-00-912-802).
     (h) Remove the blanking caps from the electrical connectors.
     (i) Make sure that all the electrical connections are clean and in the correct condition.
     (j) Connect the electrical connector (24).
     (k) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-51-11-420-050-E ** ON A/C NOT FOR ALL
A. Installation of the Pressure Sensor
F Pressure Sensor - Component Location ** ON A/C NOT FOR ALL
   (1) Lubrication of the packings
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
     (a) Apply a small amount of Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) to the new AIPC 21-51-51-04-050 PACKING-PREFORMED (11) or AIPC 21-51-51-03-050 PACKING-PREFORMED (11) and the new AIPC 21-51-51-04-040 PACKING-PREFORMED (12) or AIPC 21-51-51-03-040 PACKING-PREFORMED (12)
   (2) Preparation of the Screws
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
     (a) Apply a small amount of Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads of the screws (1) and (7).
   (3) Put the packing (11) and (12) in position on the sensor boss (10).
   (4) Make sure that the air-transfer holes in the sensor boss (10) are free from grease and other contamination.
   (5) Connect the electrical connector (6)
   (6) Put the sensor (5) in position and insert the sensor boss (10) into the sensor mount (13).
NOTE: The sensor P/N and information on the body of the sensor should face in a downwards direction.
   (7) Push the sensor (5) in a forward direction until a stop is made between the sensor flange (4) and the sensor mount (13).
   (8) Insert the washers (2) and the screws (1).
   (9) TORQUE the screws (1) to between 0.38 and 0.32 m.daN (33.63 and 28.32 lbf.in ) T
NOTE: Make sure that there is no gap between the sensor flange (4) and the sensor mount (13)
   (10) Put the clamp (9) in position and install the new AIPC 21-51-51-04-090 WASHER (8) or AIPC 21-51-51-03-090 WASHER (8) and the screws (7).
   (11) TORQUE the screws (7) to between 0.11 and 0.09 m.daN (9.73 and 7.96 lbf.in ) T.
Subtask 21-51-11-865-052-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 9HB (P2 FLOW SENSOR)
122VUAIR COND/PACK TEMP/CTL SYS1/2/115VAC21HHW22
122VUAIR COND/PACK TEMP/CTL SYS1/2/28VDC23HHW21
122VUAIR COND/PACK TEMP CTL SYS2/2/28VDC24HHY21
122VUAIR COND/PACK TEMP CTL SYS2/2/115VAC22HHY20
FOR FIN: 10HB (P1 FLOW SENSOR)
122VUAIR COND/PACK TEMP/CTL SYS1/1/115VAC1HHX22
122VUAIR COND/PACK TEMP/CTL SYS1/1/28VDC3HHX21
122VUAIR COND/PACK TEMP CTL SYS2/1/28VDC4HHY19
122VUAIR COND/PACK TEMP CTL SYS2/1/115VAC2HHY18
** ON A/C NOT FOR ALL
FOR FIN: 23HB2 (SENSORDELTA PRESS,PACK 1)
49VUAIR COND/TEMP CTL/SYS 1 CHAN B/28VDC52HHD08
122VUAIR COND/TEMP CTL SYS 1/CHAN A/115VAC49HHX22
122VUAIR COND/TEMP CTL SYS 1/CHAN A/28VDC51HHX21
122VUAIR COND/TEMP CTL SYS 1/CHAN B/115VAC50HHY18
FOR FIN: 24HB2 (SENSORDELTA PRESS,PACK 2)
122VUAIR COND/TEMP CTL SYS 2/CHAN A/115VAC53HHW22
122VUAIR COND/TEMP CTL SYS 2/CHAN A/28VDC55HHW21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/28VDC56HHY21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/115VAC54HHY20
Subtask 21-51-11-710-050-A
C. Test
   (1) Do the pre-conditioning through the HP ground connector (Ref. AMM TASK 12-33-21-618-001) or with the APU (Ref. AMM TASK 12-33-21-618-001).
   (2) Do a leak check of the pressure sensor sense line connections.
NOTE: Leaks are not permitted.
   (3) After approx. 15 minutes stop the pre-conditioning (Ref. AMM TASK 12-33-21-618-001) or (Ref. AMM TASK 12-33-21-618-001).
   (4) Do the operational test of the flow control and indicating system (Ref. AMM TASK 21-51-00-710-002).
5. Close-up
Subtask 21-51-11-410-050-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) Install the access panel (Ref. AMM TASK 53-35-13-400-002):
     (a) FOR [10HB] (P1 FLOW SENSOR)
191KB,
     (b) FOR [9HB] (P2 FLOW SENSOR)
192KB.
Subtask 21-51-11-410-050-B ** 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) Install the access panel (Ref. AMM TASK 53-35-13-400-002):
     (a) FOR [23HB2] (SENSOR-DELTA PRESS,PACK 1)
191KB,
     (b) FOR [24HB2] (SENSOR-DELTA PRESS,PACK 2)
192KB.
Subtask 21-51-11-862-050-A
B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.05 10:34:31 UTC
"AVIABRAIN" 2025