What was found
FUEL ODOR IN FLIGHT DECK AFTER APU & NR 1 ENGINE START. RETURNED TO GATE, R & R APU "OUT" FUEL LINE AT FUEL CONTROL, REF AMM 49-32-01. OPS CHECKED GOOD, NO LEAKS NOTED OR FUEL ODOR IN COCKPIT. FOUND GROUND CONNECTION VALVE SPRING BROKEN REF AMM 21-22-04. SUSPECT LEAKING THRU AIR DUCTS. R & R CONNECTION VALVE SPRING REF AMM 21-22-04. OPS ARE GOOD.