Pilots need access to a toilette, but also there are rare cases where pilots need to look out of side windows. There's also flights with crew changes. And the v

Pilots need access to a toilette, but also there are rare cases where pilots need to look out of side windows. There's also flights with crew changes. And the very rare case of crew incapacitation. A case where a pilot needed to gain access to the cockpit but couldn't, Germanwings Flight 9525.