What was found
PERFORMED ASCB SELF TESTS IN MAINTENANCE MODE AND INTERMITTENT FAULT CODES 4014-1, 4016-5 AND 4017-5 OCCURRED POINTING TO ADC PRIMARY BUSS AND AFCS BUSS FAULTS. SEVERAL ENVIRONMENTAL SPLICES WERE FOUND IN NEED OF REPLACEMENT. THE SLEEVE PORTION OF THE ENVIRONMENTAL SPLICE MAY HAVE BEEN OVERHEATED DURING INSTALLATION OR THEY MAY SIMPLY BE FAILING WITH AGE. THE SLEEVE HAS BECOME BRITTLE AND IS CRACKING AT THE EDGE OF THE SPLICE BARREL EXPOSING THE BARE METAL OF THE ENVIRONMENTAL SPLICE. IN THIS CONDITION INTERMITTENT SHORTING IS OCCURRING CAUSING FAULTS IN THE ASCB, AVIONICS STANDARD COMMUNICATIONS BUSS, SYSTEM.