I'll admit I am lazy when it comes to pulling wheels and inspecting brakes and simply ignored the task.
Trailer is a King Saltwater series triple axle and I been replacing the Tie Down discs with Kodiaks and stainless calipers. When converting the rear axle everything was fine other than pads that were almost toast. Moving to the middle axle discovered the factory didnt really care how they routed the rubber brake hose going to the caliper and one side abraded through and leaked. Fixed that, bleed the brake then noticed the rubber hose on the other side just popped as well as it now became the weak link.
So before running into Anchorage to get some more hose made ($40 each X 4!) decided to inspect the front axle and discovered both rubber hoses were also chafed and would most likely pop when the pressure was buit up. Decided to inspect everything again up front and then noticed one of the calipers was missing the nuts that held it in place over the rotor.
Learn from my mistake. If I had pulled the wheels once a year would of discovered the chafing and missing nuts and both would of been simple to fix.