ZM Equity Partners-backed Erickson Air-Crane has updated its IPO terms, setting a price range of $13 to $15 per share for 5.35 million shares. The company filed to go public in May 2010 on the NASDAQ under the ticker symbol EAC. Stifel Nicolaus & Company is serving as a representative for the underwriters. Erickson operates and manufactures heavy-duty aircrane helicopters. ZM Equity began backing the company in November 2007.