This standard specifies the general technical requirements for light guide plates for information display and external lighting (red and white light) of instruments in aircraft cockpits, control panels (boxes), and consoles. When this standard needs to be exceeded due to special circumstances, it shall be stipulated by special technical conditions.
HB 5863-1984 history
1985HB 5863-1984 General technical requirements for light guide plates for aircraft cockpit lighting and display