Man pages matching name fgfsrc in section 5:

fgfsrc.5.en	debian 10 / flightgear
fgfsrc.5.it	debian 10 / flightgear
fgfsrc.5.en	debian 11 / flightgear
fgfsrc.5.it	debian 11 / flightgear
fgfsrc.5.en	debian 12 / flightgear
fgfsrc.5.it	debian 12 / flightgear