The P-s5.6 twin ion engine represents a twin ion engine design that was produced by Sienar Fleet Systems in the era of the Galactic Civil War. Initially developed for Sienar's experimental TIE Advanced x1, this engine was subsequently refined and made a standard component of the TIE/IN interceptor.
- Star Wars: Build the Millennium Falcon 17 (Starship Fact File: TIE Advanced x1 Prototype) (Initial Mention)
- Star Wars: TIE Fighter Deluxe Book and Model Set
- TIE Fighter Owners' Workshop Manual
- " TIE Fighters " — Star Wars Encyclopedia
- LEGO Star Wars Ultimate Collector's Series (Set: 75382 TIE Interceptor)