July 31 (Reuters) – Aluminum products maker Arconic Inc’s revenue climbed 9.6 percent in the second quarter, led by increased demand for aircraft parts. Net income fell to $120 million, or 24 cents per share, in the quarter ended June 30, from $212 million, or 43 cents per share, a year earlier. Sales rose to $3.57 billion from $3.26 billion.