SUMMARY:NATIONAL (FORMERLY DOLPHIN) IS THE LARGEST MICRO-MINI MOTORHOME MANUFACTURER.SINCE 1980 ALL THEIR VEHICLES HAVE BEEN 20 FT OR GREATER, REQUIRING EXTENDED FRAMES AND AFTERMARKET DUAL REAR WHEEL CONVERSIONS.NATIONAL HAS BUILT ON TOYOTA, NISSAN AND CHEVROLET MINI TRUCK CHASSIS.NATIONAL HAS UPGRADED THE GVWR OF THEIR UNITS AFTER CONDUCTING COME FMVSS 105 BRAKE COMPLIANCE TESTS.ANALYSIS:RECEIPT OF FAILURE REPORTS INDICATES THAT NATIONAL'S RELIANCE ON THE BRAKE COMPLIANCE TESTING IS NOT SUFFICIENT AND THAT THE VEHICLES ARE OVERLOADED.STATUS:DEFECT REVIEW PANEL HELD ON 4/27/87. CLOSED THIS EA AND OPENED INVESTIGATIVE CASE C87-001-001.======