Overrideable YZ-latches
e) Overrideable Y-guide (splitter):
The overrideable Y-guides are used to separate half-size ULDs during loading and offloading.
They are located in the entrance area of AFT and FWD holds.
When loading ULDs they can be lowered manually by foot beneath the level of the cargo loading
system then when half size containers are loaded they can be pulled up using the control panel
joystick in order to separate the ULDs. 

Overrideable Y-guide A. CARGO SYSTEMS

f) XZ-latches:
The XZ-latches are used to lock the ULDs in X- and Z-direction. They are fitted to the roller tracks. They are spring loaded and operated manually. Limit switches are installed underneath some of the XZ-latches. These switches serve to cut off the power supply of the associated PDUs when the applicable latch is in the locked (up) position and to restore PDU power supply when the latch is in lowered position. To unlock/lower the latch the pawl marked —Press to unlock“ needs to be pressed this can be achieved by foot pressure. The latch is locked by hand by pulling the pawl upwards.
Depending on the cargo hold configuration single, double or triple latches may be installed in order to accommodate any kind of ULD loading.

Single latch Double latch Triple latch g) Endstops:
The fixed XZ-endstops at the extremities of each cargo hold are used to lock ULDs in the X- and Z-direction.
SYSTEMS

A. CARGO SYSTEMS

SYSTEMS

2.3. Cargo loading system failure cases
In case of failure or malfunctions of some of the cargo loading system equipments: nets; tie down
points, latches; …, some limitations in the allowed cargo weight per position may appear.
The WBM details these different limitations in chapter 1.10.
In case of malfunctioning ULD‘s and aircraft structure. 
Malfunctioning equipment should be replaced as soon as possible.

Failure of a latch may require weight reduction of the ULD forward and aft of the latch of LH and
RH of the latch.

Example :
A330-200 : In case of XZ-latch failure between position 13L and 21L, ULD weight must be
reduced to 0 kg on both position.

A. CARGO SYSTEMS

2.4. Additional Cargo holds related systems
2.4.1. Cargo hold doors
In most Airbus aircraft there are three cargo doors: one for the forward compartment, one for the aft cargo compartment and one for the bulk compartment. However the shorter A318 and A319 do not have the bulk cargo door.The forward and the aft cargo doors open to the outside and the bulk cargo door opens to the inside.

Bulk Cargo Door
CLEAR OPENING DIMENSIONS

A318  A319  A320  A321  A310/A300  A330/A340 
FWDDOOR 1.24 x 1.28 m (48.8x50.5 in)  1.23 x 1.82 m (48.6x71.5 in)  1.23 x 1.82 m (48.6x71.5 in)  1.23 x 1.82 m (48.6x71.5 in)  1.69 x 2.70 m (66.8x106 in)  1.70 x 2.70 m (66.9x106 in) 
　
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