<md-input-container flex class="md-icon-float md-block no-margin-bottom  md-select-align">
                        <label id="symptomCodeslbl" for="symptomCodeslbl">Failure Codes</label>
                        <md-icon class="pad-left10" md-font-icon="fa fa-gavel"></md-icon>
                        <md-select id="symptomCodesDropDownList" name="SymptomCode" ng-model="sparePartDetails.SymptomCode" multiple>
                            <md-optgroup label="{{code}}" ng-repeat="code in failureCodeList">
                                <md-option ng-value="symptom" ng-selected="selectFailureCode(symptom.Description)" ng-repeat="symptom in symptoms | filter:{FailureCode:code}">{{symptom.Description}}</md-option>
                            </md-optgroup>
                        </md-select>
                    </md-input-container>

$scope.selectFailureCode = function (description) {
        angular.forEach(partDetails.FailureCode, function (value, key) {
            if (description == value.Description) {
                return true;
            }
            else {
                return false;
            }
        });
    }

[{ "IDFailureCode": "51d01fdf-1d3f-4c7e-97bb-27a713b91c03", "Description": "11 - Keyboard Backlight", "IDParentFailureCode": "842cce3d-c26c-487d-9b69-09d06ad6d7b5", "FailureCode": "CN - Connector not working" }, { "IDFailureCode": "05ae9dd7-06c2-4080-92ac-71f1e0c81230", "Description": "01 - OTHER STORAGE DEVICE NOT RECOGNIZED", "IDParentFailureCode": "7f494365-0801-412a-9512-0a3f3b5f2911", "FailureCode": "SD - OTHER STORAGE DEVICE" }]

"ChildFailureDetail": [
            {
                "IDFailureCode": "a7b6cd59-5f7e-4b83-8f54-3c908e0484ed",
                "Description": "02 - OTHER STORAGE DEVICE FUNCTION FAILURE",
                "IDParentFailureCode": "7f494365-0801-412a-9512-0a3f3b5f2911",
                "FailureCode": "SD - OTHER STORAGE DEVICE"
            },
            {
                "IDFailureCode": "05ae9dd7-06c2-4080-92ac-71f1e0c81230",
                "Description": "01 - OTHER STORAGE DEVICE NOT RECOGNIZED",
                "IDParentFailureCode": "7f494365-0801-412a-9512-0a3f3b5f2911",
                "FailureCode": "SD - OTHER STORAGE DEVICE"
            },
            {
                "IDFailureCode": "9193dc86-419d-4ddf-a15a-c75727b78806",
                "Description": "08 - MEMORY CARD READER FUNCTION FAILURE",
                "IDParentFailureCode": "7f494365-0801-412a-9512-0a3f3b5f2911",
                "FailureCode": "SD - OTHER STORAGE DEVICE"
            },
            {
                "IDFailureCode": "71739865-9af6-4ca0-bfaa-cd02b27f3c66",
                "Description": "05 - TAPE DRIVE FUNCTION FAILURE",
                "IDParentFailureCode": "7f494365-0801-412a-9512-0a3f3b5f2911",
                "FailureCode": "SD - OTHER STORAGE DEVICE"
            }
        ]

$scope.selectedFailureCode = partDetails.FailureCode[0].Description