What was found
ATB - FUEL QTY SYS FAIL, AIR DATA 1 FAIL, BLEED AIR L FAIL APU FAULT, PCU FAULT, GPWS FAIL SEL CABIN PRESS MAN, GPSY FAIL, LT AIR SENS FAIL DISPLAYED. TROUBLESHOT SYSTEMS AND FOUND NR 2 VIA CAUSING ASSOCIATED FAILS. REMOVED AND REPLACED NR 2 VIA PER AMM 31-43-01. OPS CK OK FOR SERVICE.