Quick view Add to Cart Modification of T-28A to T-28D, Incorporating R1820-56S Engine and Increased Armament Capability [nov728stocs94] Document Part Number: T.O. No. 1T-28A-544 Number of pages: 56Part Number: T.O. No. 1T-28A-544Revision Date: 10-July-1962 MSRP: Was: Now: $31.38