passdown-actions

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  
  actions: {
    passDown: function() {
      alert('passDownInApplicationController');
    },
  }
});

application.template.hbs

{{my-component1 passDown=(action 'passDown')}}

my-component1.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

my-component1.template.hbs

Component1

{{my-component2 passDown=passDown}}

my-component2.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

my-component2.template.hbs

Component 2

<div {{action passDown}}>
click me - i have the passed down action!
</div>

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember-template-compiler.js"
  }
}