Dependent ComboBox Not Firing for Tab in ExtJS

Question

I have a make and a model combo box. The make combo loads info when the user selects a make. The problem is, it does not fire when the user tabs off the combobox. It does work when they press enter or they select an item from the list with the mouse. Here is what we have for the make combo:

new Ext.form.ComboBox({
    id: 'ddlMake',
    store: makeStore,
    displayField: 'Description',
    valueField: 'MakeOid',
    width: 175,
    typeAhead: true,
    mode: 'local',
    forceSelection: true,
    triggerAction: 'all',
    emptyText: 'Select a make',
    selectOnFocus: true,
    allowBlank: false,
    listeners:
        {
            select: function(combo, record, index) {
                LoadModelCombo(combo, record, index);
                FillAircraftType();
            }
        }

Answer 1

Here is what I ended up using. I used both select and change:

new Ext.form.ComboBox({
    id: 'ddlMake',
    store: makeStore,
    displayField: 'Description',
    valueField: 'MakeOid',
    width: 175,
    typeAhead: true,
    mode: 'local',
    forceSelection: true,
    triggerAction: 'all',
    emptyText: 'Select a make',
    selectOnFocus: true,
    allowBlank: false,
    listeners: {
        select: function (combo, record, index) {
            LoadModelCombo(combo, record, index);
            FillAircraftType();
        },
        change: function (combo, record, index) {
            LoadModelCombo(combo, record, index);
            FillAircraftType();
        }
    }
}),