W DOC AIRBUS | AMM A320F

Functional Test of the Galley/Lavatory Air Extraction Duct

TASK 21-23-00-720-001-A
Functional Test of the Galley/Lavatory Air Extraction Duct

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: MAKE SURE THAT THE FWD AVIONICS ACCESS DOOR 811 IS OPEN WITH A WARNING PLACARD ATTACHED TO IT. THE WARNING NOTICE MUST TELL PERSONS NOT TO CLOSE THE DOOR. THIS PREVENTS ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT.
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
HOSE LENGTH 2 M (6.6 FT)
No specific
Torque wrench: range to between 0.07 and 0.034 m.daN (6.19 and 3.01 lbf.in ) T
EMA84-10-5-1
1
DIGITAL MANOMETER - 0 TO 10 KPA (0 TO 100 MBAR)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
222BC, 251HC
 C. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
2
LOCK WASHER
AIPC 21-23-04-10-140
2
WASHER-LOCK
AIPC 21-23-84-04-070
 D. 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 25-13-41-000-001-A
Removal of the Ceiling Panels
TASK 25-13-41-400-001-A
Installation of the Ceiling Panels
F Pressure Measurement Point - Locations
3. Job Set-up
Subtask 21-23-00-861-050-A
A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
Subtask 21-23-00-865-050-A
B. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
122VUAIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/CTL5HUU21
122VUAIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/SPLY6HUU19
Subtask 21-23-00-010-050-A
C. Remove the ceiling panels 222BC between FR 16-17, and 251HC between FR 61-63 (Ref. AMM TASK 25-13-41-000-001).
4. Procedure
Subtask 21-23-00-720-050-E ** ON A/C NOT FOR ALL
A. Functional Test of the Air Extraction Duct
ACTION
RESULT
1.Remove the blanking cap (3) from the forward pressure measurement point 1025.
  • Connect the EMA84-10-5-1 DIGITAL MANOMETER - 0 TO 10 KPA (0 TO 100 MBAR) to the forward pressure measurement point 1025 with a piece of HOSE LENGTH 2 M (6.6 FT).
On the manometer:
  • The pressure reads between 6 mbar (0.09 psi) and 10 mbar (0.15 psi).
2.Disconnect the manometer and the silicone tubing from the forward pressure measurement point 1025.
  • Install the blanking cap (3) on the forward pressure measurement point 1025.

3.Remove the screw (1) and the lock washer (2) from the aft pressure measurement point 1026.
  • Discard the lock washer (2).
  • Connect the EMA84-10-5-1 DIGITAL MANOMETER - 0 TO 10 KPA (0 TO 100 MBAR) to the aft pressure measurement point 1026 with a piece of HOSE LENGTH 2 M (6.6 FT).
On the manometer:
  • The pressure reads between 11 mbar (0.16 psi) and 15 mbar (0.22 psi).
4.Disconnect the manometer and the silicone tubing from the aft pressure measurement point 1026.

Subtask 21-23-00-720-050-F ** ON A/C NOT FOR ALL
A. Functional Test of the Air Extraction Duct
ACTION
RESULT
1.Remove the blanking cap (3) from the forward pressure measurement point 1025.
  • Connect the EMA84-10-5-1 DIGITAL MANOMETER - 0 TO 10 KPA (0 TO 100 MBAR) to the forward pressure measurement point 1025 with a piece of HOSE LENGTH 2 M (6.6 FT).
On the manometer:
  • The pressure reads between 5 mbar (0.07 psi) and 10 mbar (0.15 psi).
2.Disconnect the manometer and the silicone tubing from the forward pressure measurement point 1025.
  • Install the blanking cap (3) on the forward pressure measurement point 1025.

3.Remove the screw (1) and the lock washer (2) from the aft pressure measurement point 1026.
  • Discard the lock washer (2).
  • Connect the EMA84-10-5-1 DIGITAL MANOMETER - 0 TO 10 KPA (0 TO 100 MBAR) to the aft pressure measurement point 1026 with a piece of HOSE LENGTH 2 M (6.6 FT).
On the manometer:
  • The pressure reads between 11 mbar (0.16 psi) and 16 mbar (0.23 psi).
4.Disconnect the manometer and the silicone tubing from the aft pressure measurement point 1026.

Subtask 21-23-00-720-050-G ** ON A/C NOT FOR ALL
A. Functional Test of the Air Extraction Duct
ACTION
RESULT
1.Remove the blanking cap (3) from the forward pressure measurement point 1025.
  • Connect the EMA84-10-5-1 DIGITAL MANOMETER - 0 TO 10 KPA (0 TO 100 MBAR) to the forward pressure measurement point 1025 with a piece of HOSE LENGTH 2 M (6.6 FT).
On the manometer:
  • The pressure reads between 5 mbar (0.07 psi) and 10 mbar (0.15 psi).
2.Disconnect the manometer and the silicone tubing from the forward pressure measurement point 1025.
  • Install the blanking cap (3) on the forward pressure measurement point 1025.

3.Remove the screw (1) and the lock washer (2) from the aft pressure measurement point 1026.
  • Discard the lock washer (2).
  • Connect the EMA84-10-5-1 DIGITAL MANOMETER - 0 TO 10 KPA (0 TO 100 MBAR) to the aft pressure measurement point 1026 with a piece of HOSE LENGTH 2 M (6.6 FT).
On the manometer:
  • The pressure reads between 10 mbar (0.15 psi) and 15 mbar (0.22 psi).
4.Disconnect the manometer and the silicone tubing from the aft pressure measurement point 1026.

5. Close-up
Subtask 21-23-00-410-052-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the ceiling panels 222BC and 251HC (Ref. AMM TASK 25-13-41-400-001).
   (3) Remove the WARNING NOTICE(S).
Subtask 21-23-00-862-050-A
B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:10:56 UTC
"WTRUIB" 2025