Update to the department field isn't working

I'm trying to use a simple scheduled script to update Return Authorization Department field. Doing Save -> Execute.

Script:

function updateTransactionDept() {
var records = nlapiSearchRecord('returnauthorization', 'customsearch1764', null, null);
  for ( var i = 0; i < records.length; i++ ) {
         nlapiSubmitField(records[i].getRecordType(), records[i].getId(), 'department', 288);
     }
}

Doesn't throw any errors. Says it completed. Nothing gets updated.

Ideas? =/