▁E 1 3 K ▁pro tot ypes ▁fle w ▁on ▁ 2 8 ▁September ▁ 1 9 3 8 . ▁In ▁October ▁ 1 9 3 8 , ▁the ▁aircraft ▁was ▁transferred ▁to ▁the ▁fleet ▁base ▁for ▁testing , ▁and ▁even ▁though ▁the ▁E 1 3 K ▁out per formed ▁the ▁A ichi ▁E 1 3 A ▁except ▁in ▁maximum ▁speed , ▁it ▁was ▁difficult ▁to ▁operate , ▁so ▁the ▁Navy ▁chose ▁the ▁E 1 3 A ▁to ▁be ▁the ▁replacement ▁for ▁the ▁E 7 K . ▁ ▁Oper ators ▁▁ ▁Imperial ▁Japanese ▁Navy ▁Air ▁Service ▁ ▁Spec ifications ▁ ▁See ▁also ▁ ▁References ▁ ▁Further ▁reading ▁▁▁ ▁E 0 7 K , ▁K aw an ishi ▁Category : Float plan es ▁E 0 1 3 ▁Category : Single - eng ined ▁tra ctor ▁aircraft ▁Category : Bi plan es ▁Category : A ircraft ▁first ▁flow n ▁in ▁ 1 9 3 3 <0x0A> </s> ▁San ▁F éli x ▁District ▁is ▁a ▁district ▁( dist rito ) ▁of ▁Ch iri qu í ▁Province ▁in ▁Pan ama . ▁The ▁population ▁according ▁to ▁the ▁ 2 0 0 0 ▁census ▁was ▁ 5 , 2 7 6 . ▁The ▁district ▁covers ▁a ▁total ▁area ▁of ▁ 2 2 0   km ². ▁The ▁capital ▁lies ▁at ▁the ▁city ▁of ▁Las ▁La jas . ▁ ▁Administr ative ▁divisions ▁San ▁F éli x ▁District ▁is ▁divided ▁administr atively ▁into ▁the ▁following ▁cor reg imientos : ▁ ▁Las ▁La jas ▁( cap ital ) ▁Ju ay ▁San ▁F