§29.1333 Instrument systems

For sy stems t hat operat e the required flight instruments which are lo cated at each pilot’s station, the following apply: (a) Only the required f light instrum ents for the first pilot m ay b e co nnected to th at o perating system. (b) The equipment, systems, and installations must be desi gned so t hat one di splay of t he information essential to the safety o f flig ht wh ich is provided by t he fl ight i nstruments rem ains available to a pilot, without additional crew member action, after any single failure or combination of fai lures t hat are not shown to be extremely improbable. (c) Additional instrum ents, system s, or equipment may not be connect ed t o t he operat ing system for a second pi lot unl ess provi sions are made t o ensure t he cont inued norm al funct ioning of t he requi red fl ight i nstruments in the event of any m alfunction of t he additional instruments, systems, or equi pment whi ch i s not shown to be extremely improbable.