Bulkhead mount equipment shelf rack tray

A method for mounting Line Replaceable Units (LRU) comprising the steps of:

• providing a tray having a rear mounting boss;
• providing a tray support and alignment element with tray and wall attachment studs;
• providing a backing plate;
• providing spaced holes to accommodate the wall attachment studs in an associated mounting structure;
• inserting the wall attachment studs into the spaced holes;
• securing the backing plate to the wall attachment studs;
• mounting the tray by inserting the tray attachment studs into mating bores in the tray rear boss;
• securing the tray with threaded fasteners through the flange into threaded inserts in the rear boss;
• placing an LRU box on the tray with the bottom corners engaged by rails on the tray;
• and,
• sliding the LRU box rearwardly for the lower portions of the rear edges of the box to be received by angle reliefs in positioning brackets on the tray urging the box into precise alignment for engaging connectors.

An aircraft incorporating Line Replaceable Units (LRU), the aircraft in part comprising:

• at least one bulkhead as a mounting structure;
• at least one unitary tray having a rear boss and an integral Air Cooling System (ACS) plenum, an ACS conduit through the rear boss communicating with the plenum;
• at least one tray support and alignment element having
• a flange with tray attachment studs extending from a front surface thereof.
• wall attachment studs extending from a rear surface thereof and
• an ACS aperture,
• the wall attachment studs received in spaced holes in the mounting structure and the tray attachment studs received in bores in the rear boss, insertion of the tray attachment studs aligning the ACS conduit in the rear boss and the ACS aperture in the flange.

An aircraft incorporating Line Replaceable Units (LRU), the aircraft in part comprising:

• a unitary tray having a rear boss and an integral plenum, a conduit through the rear boss communicating with the plenum;
• a flange having an aperture;
• tray attachment studs extending from a front surface of the flange,
• wall attachment studs extending from a rear surface of the flange, and
• the wall attachment studs received in spaced holes in a mounting structure and the tray attachment studs received in bores in the rear boss, insertion of the tray attachment studs in said bores aligning the conduit in the rear boss and the aperture in the flange.