What was found
AIRCRAFT WAS GROUNDED: PILOT DIVERTED TO ELP ON ACCOUNT OF A/C BUS 2 FAILURE ENROUTE. WHEN AC BUS 2 FAULTED, WE DETECTED MOMENTARY ODOR OF SMOKE. APU BROUGHT ONLINE BUT FAILED TO PICK UP LOAD FOR FAILED BUS. AN EMERGENCY WAS DECLARED. MAINTENANCE COMPLIED WITH JOB CARD 26L000210001. INSPECTED #2 ENGINE IDG POWER CABLE(S) AND CONNECTORS WITH NO DEFECTS FOUND. REMOVED AND REPLACED RELAY/CONTACTORS 4XU2/30XU2/9XU/11XU IAW ESPM 20-46-50. REPLACED 19XU2 NETWORK PROTECTION IAW AMM 24-22-55 PAGEBLOCK 0401. OPS CHECK NORMAL IAW AMM 24-24-00-852/862/867-002.