W DOC AIRBUS | AMM A320F

Operational Test of the Door Sill Latches in the Forward Cargo Compartment and in the Aft Cargo Compartment

TASK 25-52-00-710-004-A
Operational Test of the Door Sill Latches in the Forward Cargo Compartment and in the Aft Cargo Compartment

ZONE: 130
ZONE: 150
FIN: 2004VU1 ** ON A/C NOT FOR ALL
FIN: 2004VU2 ** 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
1
ACCESS PLATFORM 2M (6 FT)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
2
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
130
FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
150
AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
134AR, 154AR
 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 25-52-00-820-001-A
Adjustment of the Servo Mechanism
TASK 25-52-22-000-001-A
Removal of the Ball Mats and the Ball Strips
TASK 25-52-22-400-001-A
Installation of the Ball Mats and the Ball Strips
TASK 25-52-51-000-001-A
Removal of the Servo Mechanism and Actuator
TASK 25-52-51-400-001-A
Installation of the Servo Mechanism and Actuator
TASK 52-30-00-080-001-A
Removal of the Safety Support Equipment
TASK 52-30-00-480-001-A
Installation of the Safety Support Equipment
TASK 52-30-00-860-001-A
Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A
Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
F Servo Mechanism and Drawbars
3. Job Set-up
Subtask 25-52-00-010-062-A ** ON A/C NOT FOR ALL
A. Get Access
   (1) Open the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
   (2) Put the ACCESS PLATFORM 2M (6 FT) in position at the opening of the forward and/or aft cargo compartment door(s).
   (3) Put the WARNING NOTICE(S) on the control panel of the cargo loading system to tell persons not to use it.
Subtask 25-52-00-865-106-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
2000VUSEMI AUTO CLS-FWD3MYE08
2000VUSEMI AUTO CLS-FWD2MYE06
2001VUSEMI AUTO CLS-AFT103MYD08
2001VUSEMI AUTO CLS-AFT102MYD06
Subtask 25-52-00-010-072-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Remove the ball strips and the ball mat to get access to the servo mechanism and actuator (Ref. AMM TASK 25-52-22-000-001).
   (2) Remove the protective cover of the manual mechanism (Ref. AMM TASK 25-52-51-000-001).
   (3) Open the access panels 134AR and 154AR to get access to the control panel for the selector of the cargo-compartment door.
4. Procedure
Subtask 25-52-00-860-057-A ** ON A/C NOT FOR ALL
A. Preparation for the Test
   (1) Remove the pin 4 mm (0.1575 in.) out of the rigging hole of each door sill latch.
   (2) Make sure that the work area is clean and clear of tools and other items.
   (3) Remove the actuator safety locks from the forward and/or aft cargo compartment door(s) (Ref. AMM TASK 52-30-00-080-001).
   (4) Remove the warning notice(s).
   (5) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002)
Subtask 25-52-00-865-107-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
2000VUSEMI AUTO CLS-FWD3MYE08
2000VUSEMI AUTO CLS-FWD2MYE06
2001VUSEMI AUTO CLS-AFT103MYD08
2001VUSEMI AUTO CLS-AFT102MYD06
Subtask 25-52-00-710-057-A ** ON A/C NOT FOR ALL
C. Test
F Servo Mechanism and Drawbars ** ON A/C NOT FOR ALL
   (1) Do this Test.
NOTE: The adjustment and test of the servo mechanism and door sill latches for the forward and aft cargo compartment is the same. Thus only the servo mechanism for the forward cargo compartment is specified.
ACTION
RESULT
1.In the door sill area on the door sill latch:
On the door sill latch:
  • Push the Y-latch in the direction of the latch housing and hold it.
  • The balance assy lowers when the distance between the top of the roller and the top of the housing is less than 15 mm (0.59 in.),
  • At the same time the Y-latch moves to the locked position (90 deg to the balance assy).
  • Release the Y-latch.
  • The Y-latch moves back to the upright position.
2.On the door sill area:
On the door sill area:
  • Move the manual sill-latch lever to the "DOWN" position.
  • Each overridable Y-latch moves down,
NOTE: If the Y-latches do not lower fully or move down asymmetrically you must adjust the latches via the drawbars of the servo mechanism (Ref. AMM TASK 25-52-00-820-001).

  • Move the manual sill-latch lever to the "UP" position.
  • Each overridable Y-latch move to the upright position at the same time.
3.On each door sill latch:
On each door sill latch:
  • Push the lever of the manually operated YZ-latch down.
  • The manually operated YZ-latch of each door sill latch goes down.


On the control panel 2020VU1 of the cargo loading system:
  • Power is available on the control panel 2020VU1.
4.On the control panel 2020VU1 of the cargo loading system:
On the control panel 2020VU1 of the cargo loading system:
  • Set the POWER ON/OFF switch 5MY to ON.
  • The POWER ON/OFF indicator light 7MY comes on.
  • Power is supplied to the cargo loading system.
NOTE: Lower and raise the overridable Y-latch with the SILL LATCH switch 6MY at least two times.
5.On the control panel 2020VU1 of the cargo loading system:
On the door sill:
  • Set the SILL LATCH switch 6MY to DOWN and hold it.
  • Release the SILL LATCH switch 6MY.
  • The overridable Y-latches of the door sill latches lower.
  • The overridable Y-latches of the door sill latches come up.
  • The manual sill-latch lever (2) moves from the "A" position to the "C" position and opposite.
NOTE: If the actuator (7) has a malfunction and stops between its extended and retracted position:
  • Lower and lift the overridable Y-latches manually with the manual sill-latch lever (2),
  • The manual sill-latch lever (2) moves back to the "A" position. It stays in this position until the actuator (7) is operated.
6.On the control panel 2020VU1 of the cargo loading system:
On the door sill:
  • Set the SILL LATCH switch 6MY to DOWN and hold it.
  • Release the SILL LATCH switch 6MY.
  • The actuator (7) operates and the adjustment pin (9) engages and the manual sill-latch lever (2) moves to the "C" position.
  • The actuator (7) operates and the manual sill-latch lever (2) moves to the "A" position.
CAUTION: STOP THE OPERATION IMMEDIATELY IF THE CARGO COMPARTMENT DOOR STARTS TO CLOSE. CORRECT THE FAILURE BEFORE YOU CONTINUE THE TEST.
7.On the door sill:
On the door sill latches:
  • Move the manual sill-latch lever (2) to the "D" position.
  • Move the manual sill-latch lever (2) to the "A" position.
  • The overridable Y-latches of the door sill latches lower.
  • The overridable Y-latches of the door sill latches come up.
8.On the control panel for the selector of the cargo compartment door:
At the cargo compartment door:
  • Move the selector of the cargo compartment door to OPEN and hold it.


  • The YELLOW electric pump 3075GX does not operate.
  • Release the selector of the cargo compartment door.
  • The selector moves to the neutral position, at the same time the cargo compartment door stops.
9.On the control panel 2020VU1 of the cargo loading system:
On the control panel 2020VU1 of the cargo loading system:
  • Set the POWER ON/OFF switch 5MY to OFF.
  • The POWER ON/OFF indicator light 7MY goes off.
  • The power to the cargo loading system is stopped.
10.On each door sill latch:
On each door sill latch:
  • Push the manually operated YZ-latch up.
  • The manually operated YZ-latch locks in the up position.
  • The power supply to the control panel 2020VU1 is stopped.
11.On the control panel for the selector of the cargo compartment door:
At the cargo compartment door:
  • Move the selector of the cargo compartment door to CLOSE and hold it.
  • The cargo compartment door starts to close.
12.On the control panel for the selector of the cargo compartment door:
On the control panel for the selector of the cargo compartment door:
  • Release the selector of the cargo compartment door.
  • The selector moves to the neutral position.
13.On the control panel for the selector of the cargo compartment door:
At the cargo compartment door:
  • Move the selector of the cargo compartment door to OPEN and hold it until the green light comes on.
  • The cargo compartment door opens and locks in the open position.
14.On the control panel for the selector of the cargo compartment door:
On the control panel for the selector of the cargo compartment door:
  • Release the selector of the cargo compartment door.
  • The selector moves to the neutral position.
CAUTION: STOP THE OPERATION IMMEDIATELY IF THE CARGO COMPARTMENT DOOR STARTS TO CLOSE. CORRECT THE FAILURE BEFORE YOU CONTINUE THE TEST.
15.On the door sill:
On each door sill latch:
  • Move the manual sill-latch lever (2) to the DOWN position.
  • The overridable Y-latches lower.
16.On the control panel for the selector of the cargo compartment door:
At the cargo compartment door:
  • Move the selector of the cargo compartment door to OPEN and hold it.
  • The YELLOW electric pump 3075GX does not operate.
17.On the control panel for the selector of the cargo compartment door:
On the control panel for the selector of the cargo compartment door:
  • Release the selector of the cargo compartment door.
  • The selector moves to the neutral position.
18.On the door sill:
On each door sill latch:
  • Move the manual sill-latch lever (2) to the UP position.
  • The overridable Y-latch comes up.
19.On the control panel for the selector of the cargo compartment door:
At the cargo compartment door:
  • Move the selector of the cargo compartment door to CLOSE and hold it.
  • The cargo compartment door starts to close.
20.On the control panel for the selector of the cargo compartment door:
On the control panel for the selector of the cargo compartment door:
  • Release the selector of the cargo compartment door.
  • The selector moves to the neutral position.
21.On the control panel for the selector of the cargo compartment door:
At the cargo compartment door:
  • Move the selector of the cargo compartment door to OPEN and hold it until the green light comes on.
  • The cargo compartment door opens and locks in the open position.
22.On the control panel for the selector of the cargo compartment door:
On the control panel for the selector of the cargo compartment door:
  • Release the selector of the cargo compartment door.
  • The selector moves to the neutral position.
5. Close-up
Subtask 25-52-00-865-108-A ** ON A/C NOT FOR ALL
A. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
2000VUSEMI AUTO CLS-FWD3MYE08
2000VUSEMI AUTO CLS-FWD2MYE06
2001VUSEMI AUTO CLS-AFT103MYD08
2001VUSEMI AUTO CLS-AFT102MYD06
Subtask 25-52-00-860-069-A ** ON A/C NOT FOR ALL
B. Put the aircraft back to the serviceable condition.
   (1) Install the actuator safety locks on the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-480-001).
   (2) Put the WARNING NOTICE(S) on the control panel of the cargo loading system to tell persons not to use it.
   (3) Install the ball mats and ball strips (Ref. AMM TASK 25-52-22-400-001).
   (4) Install the protective cover of the manual mechanism (Ref. AMM TASK 25-52-51-400-001).
Subtask 25-52-00-865-109-A ** ON A/C NOT FOR ALL
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
2000VUSEMI AUTO CLS-FWD3MYE08
2000VUSEMI AUTO CLS-FWD2MYE06
2001VUSEMI AUTO CLS-AFT103MYD08
2001VUSEMI AUTO CLS-AFT102MYD06
Subtask 25-52-00-410-056-A ** ON A/C NOT FOR ALL
D. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Make sure that the YZ-latch on each door sill latch locks in the up position.
   (3) Close the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
   (4) Remove the WARNING NOTICE(S).
   (5) Close the access panels 134AR and 154AR.
   (6) Remove the access platform(s).
Subtask 25-52-00-862-052-A ** ON A/C NOT FOR ALL
E. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.01 06:26:39 UTC
"Aviabrain" 2025