Structural Monitoring Systems (ASX:SMN) has reported troubled aviation giant Boeing has completed tests using SMN’s Aft Pressure Bulkhead (APB) sensors. The tests were described by SMN as part of an ongoing certification process. The APB is the rear component of a pressure seal in all aircraft and comprises the walls of an aircraft. Notably, Boeing has before been slammed with allegations it overlooked misaligned bulkheads in its own planes built by Spirit, a company Boeing has since acquired. Perhaps, to that end, the company’s interest was piqued by SMN’s APB sensors. “Achieving today’s mile…