Rate of GST on Diesel engines, marine diesel engines, gear boxes

In re Ms Techno Tradings and Services Pvt. Ltd. (GST AAR Kerala) i) As per the Notification No.01/2017 Central Tax (Rate) dated 28/06/2017 Marine Diesel Engine falling under TSH 8408 of Customs Tariff Act, 1975, as adopted to GST, attracts 28% IGST (14% CGST+14% SGST) as per Serial No.115 of Schedule IV is correct or not? The Diesel Engines supplied for use in goods falling under heading 8901, 8902, 8904, 8905, 8906, 8907 will be deemed to be parts of vessels / goods falling under the above headings and thereby taxable @ 5% GST as per Sl. No.252 of Schedule I of the Notification No. 01/2017 Ce...