What was found
SMELL IN CABIN SMELLS LIKE EXHAUST & ELECTRICAL. APU BLEED VALVE FLUCTUATING ON ECS PAGE. REMOVED FROM SERVICE. C/W E175 FIM TASK 21-20-00-810-803. PERFORMED GVI OF PACK AIR DUCTS, APU INLET, AND EXHAUST MANIFOLDS. FOUND AND REMOVED SNOW/ICE ACCUMULATION IN THE APU INLET. THE SMELL OF AN ODD ODOR IN THE FLIGHT DECK/CABIN HAS DISSIPATED, AND NO EXHAUST, ELECTRICAL SMELL/ODOR WAS NOTED. PERFORMED OPS TEST OF THE APU IAW AMM TASK 49-10-00-700-801-A, NO APU BLEED VALVE FLUCTUATIONS. OPS TEST GOOD. NO OTHER DEFECTS NOTED. RETURNED TO SERVICE.