What was found
BETWEEN 16-18000 FT GOT LT, RT, & CENTER IRS DC FAILED. TRIED STARTING APU TO VERIFY HOT BATTERY BUS STILL WORKING. WHEN APU REACHED SPEED GOT EICAS APU FUEL VALVE & RT FUEL SPAR VALVE. MAIN BATTERY CHARGER MSG ILLUMINATED. BTWN IRU FAILS & EICAS MGS NOTICED A FAINT ELECT ODOR THAT REMAINED FOR DURATION OF FLT. ON FINAL GOT L FUEL SPAR VALVE & ANTISKID EICAS, LOST DATALINK. EMERGENCY DECLARED. COMPLETED MAIN BATTERY AND MAIN BATTERY CHARGER INSTALLATIONS IAW AMM 24-31-01-4 & 24-31-02-4. MAIN BATTERY & MAIN BATTERY CHARGER OPS CHKD GOOD. VOLTAGE CHKD GOOD AT 30V, ALL THE BATTERY & CHARGER LEDS ARE ON. NO MESSAGES DISPLAYED ON EICAS UPPER & LOWER SCREENS. RAN NEW WIRE FROM D1794 PIN 9 - GD534DC.