 Nyorai kupfuurira kweiyi ndima - Koch gare gare akapukunyuka kumwe kurwiswa nendege dzeJapan uye kuparara kwechimwe chikepe chinobhururuka cheUmambo. Pana 19 February 1942, apo iye akanga achirapa muDarwin Hospital, taundi racho rakawana denho huru mbiri dzendege. Musi waApril 22, 1943, Koch akanga achityaira Camilla, imwe ndege yeQantas Short Empire, yaibva kuAustralia ichienda kuNew Guinea, payakapunzika mugungwa pedyo nePort Moresby mumamiriro ekunze akaipa. 