AFT Cargo Isolation Valve (Valves checked closed)

21-28-04A	AFT Cargo Isolation Valve (Valves checked closed)

Applicable to: -

- Flight preparation/limitations

The (If Installed) AFT Cargo Heating and the ventilation in the AFT cargo compartment are not available.

Ensure that the AFT cargo compartment does not contain materials sensitive to important temperature variations or sensitive to the lack of ventilation.

In that respect, for live animal transportation, use the Live Animal Transportation Calculation Tool.

- During cockpit preparation

ANN LT selectorTEST

Check that the AFT ISOL VALVE pb-sw FAULT light comes on.

ANN LT selectorBRT or DIM

AFT ISOL VALVE pb-swOFF

Check that the AFT ISOL VALVE pb-sw FAULT light does not come on.

If the AFT ISOL VALVE pb-sw FAULT light comes on:

The AFT cargo isolation valves must be secured in the closed position. Refer to Item 21-28-04B AFT Cargo Isolation Valve

Disregard the COND AFT CRG ISOL VALVE alert displayed on the EWD.