NAVY INVESTIGATETWO plane crashSAN DIEGO, Feb. 26 (Hp—Th« Navy is today investigating the crash of a light bombing plane i»nd searching for another plane of tha« type missing over 24 hours. I he wreckage of the bomber whs found 15 miles from a San Diego N*T|l Base and the pilot and radio ope* rator were both killed in the Two youths testified they had Stem a plane power dive into the surf with motors wide open.