When the men refused to withdraw the letters or elaborate on the reason for their actions, Cobby contacted his immediate superior, Air Vice Marshal Bill Bostock, head of RAAF Command, the Air Force's main operational command.
Karena mereka menolak mencabut suratnya atau menjelaskan alasan tindakan mereka, Cobby menghubungi atasan sementaranya, Wakil Marsekal Udara Bill Bostock, kepala RAAF Command, komando operasional utama Angkatan Udara.