What was found
(CAN) DURING AN AUDIT, IT WAS FOUND THAT THE GLOBAL EXPRESS BRAKE CONTROL UNIT, PN 42-965-1, -2 WITH THE WHEEL CONTROL CIRCUIT CARD ASSY, CCA,PN 42-965191 & PN 42-965192, AUTOBRAKE CCA PN 42-965162 AND MOTHERBOARD CCA PN 42-96522 HAVE AN INCORRECT ALTERNATE ZENER DIODE CALLED ON THEIR BILL OF MATERIAL, BOM. POTENTIAL QUALITY ISSUE CAN EXIST ON IN-SERVICE ACFT.