Method and system for hybrid gang channel bolted joint

A method of coupling a flange joint, said method comprising:

• coupling a plurality of threaded nut assemblies to a channel assembly aligned with respective apertures in the channel assembly;
• coupling the channel assembly to a first outside face of a first flange using a blind clinch nut assembly;
• positioning inside faces of the first flange and a second flange of a connection flange assembly proximate each other such that apertures through the first and second flange align;
• threading a plurality of bolts from a first outside face of the second flange through at least some of the apertures through the first and second flange into respective threaded nut assemblies;
• and
• threading a plurality of bolts from a first outside face of the second flange through at least some of the apertures through the first and second flange into respective clinch nut assemblies.

A turbofan engine comprising:

• a core engine including a multistage compressor and a combustor section, said multistage compressor comprises a first connection flange and said combustor section comprises a second connection flange complementary to said first connection flange;
• a fastening assembly configured to couple said first connection flange and said second connection flange together, said fastening assembly comprising:
• a channel assembly comprising:
• an elongate web having a pair of opposing side edges;
• a plurality of spaced apart apertures extending through said web;
• and
• at least one anti-rotation lip extending away from said at least one side edge of said pair of side edges;
• a threaded nut assembly comprising a threaded internal bore and an external anti-rotation tab, said threaded nut assembly coupled to said web with said threaded bore aligned with a respective one of said plurality of spaced apart apertures;
• and
• a clinch nut assembly comprising a threaded internal bore, an external anti-rotation tang, and a bore extension, said clinch nut assembly configured to fixedly couple said web to an outside face of a connection flange.