Issue 01 Product type Noise Manufacturer/TC Holder Harbin Hafei Aviation industry Co., Ltd. DownloadsRelated ContentGet notified via email alerts Downloads [pdf] IM.A.679 - Y12F Related Content Type Certificate Data Sheets (TCDS) EASA.IM.A.679 - Y12F Get notified via email alerts Stay informed when this page is updated, or when we publish new content like this. You can always unsubscribe or update these settings later on. Create an account with your email or login Email address ? Create an account with your social account or login Facebook Google Linkedin