Parker Aerospace and China Aviation Industry Corporation (AVIC) held a contract-signing ceremony just ahead of the Paris Air Show to form two joint venture companies in support of Comac’s new C919 program.
Hydraulic drive system
Canyon Engineering Products (Hall 4 Stand F7) has developed a line of dual- or multiple-port manual rotary-select valves that enable aircraft operators to isolate hydraulic pressure, at up to 5,000 psi, from specific systems to permit aircraft ground maintenance. The company’s rudder isolation valve, operating with 7.92 U.S. gallons per minute flow rate at up to 7.25 psi differential pressure, has an overall weight of 1.05 pounds, while another product is a three-port, two-position valve to isolate nosewheel door actuators for servicing.
Eurocopter AS 350BA, Brooklyn, N.Y., May 4, 2004–The NTSB blamed the crash of Helinet Aviation Services’ WNBC News Chopper 4 on the pilot’s failure to maintain control after a loss of hydraulic system pressure.
The FAA has issued an airworthiness directive (AD) for the Eurocopter AS 350B/BA/B1/B2/B3/D and AS 355E Squirrel light helicopters, requiring replacement of the hydraulic fluid at a specified interval when operating in cold weather. The amendment is prompted by reports of ice forming due to condensation in some parts of the hydraulic system.
Diversified industrial manufacturer Eaton Corp. is showing its range of expertise in the aerospace field here in Paris, highlighting its recent developments in the civil realm, such as a 5,000-psi hydraulic power generation and fluid conveyance system used in the Airbus A380.