85 Provide engineering technical support to airplane heavy maintenance; airplane modification; by liaison with OEM. Perform AD/SB evaluation and generate Engineering EO/TN. Coordinate with customers and production by providing necessary engineering support when needed. 85 Evaluate AD, SB and other technical documents. 85 Prepare/Check/Approve EO, Technical Note, Fabrication Order and other technical documents. 85 Handle Engineering Disposition Request (EDR) which generated by production. 85 Handle IDR (Installation Deviation Record) with Boeing. 85 Developing maintenance capability and repair techniques and product manufacturing. 85 Develop repair/modification schemes and initiate cooperation with customers, OEM to gain approvals for repair/modification out of manual. 85 Provide Weighing and Balancing Report.