Owner/operators of Bell 206L series helicopters can install a new cylinder extension assembly from Tactair Fluid Controls, a subsidiary of Young & Franklin. The new cylinder extension assembly is detailed in a Tactair service bulletin (SB42C42642-67-04) and a Bell Helicopter information letter (206L-14-97), and its replacement is recommended for accomplishment during repair or overhaul of the hydraulic servo actuator. The improvement replaces the existing cylinder extension assembly with an upgraded component that is designed to increase the reliability and service life of the entire hydraulic servo actuator.
The National Institute for Aviation Research (NIAR) at Wichita State University is offering a new oil analysis service for all types of piston and turbine engines. NIAR’s new oil analysis lab can perform trivector analysis (wear, contamination, general oil chemistry); infrared spectroscopy (monitors molecular substance in oil); particle count/shape recognition; elemental analysis (checking for elements that correlate to contaminants, wear metals and additives); and viscosity testing.
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.
Duncan Aviation added an upgraded hydraulic Skydrol test bench to expand capacity and capabilities for large aircraft and to move in-house work that had been outsourced. “The addition will increase the efficiency of our component capabilities for landing-gear projects and add more than 100 part numbers to Duncan Aviation’s hydraulic support team, especially in the Challenger and Global markets,” said Marty Lincoln, accessories manager at Duncan Aviation’s Lincoln, Neb., location.
The FAA issued an AD–Docket FAA-2012-0222– on September 6 for some versions of the Eurocopter AS350. The directive, which is effective from October 11 this year, was issued after an in-flight fire caused by the ignition of hydraulic fluid leaking from a damaged forward servo-control hydraulic hose. The AD is intended to prevent the forward servo-control hydraulic hoses from becoming damaged and leaking hydraulic fluid that could ignite in flight.
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.
The FAA proposes to adopt a new airworthiness directive (AD) for certain Eurocopter AS350 helicopters. Prompted by an in-flight fire caused by ignition of hydraulic fluid leaking from a damaged forward (pitch) servo-control hydraulic hose, the proposed AD is intended to prevent the forward servo-control hydraulic hoses from becoming damaged and leaking hydraulic fluid that could ignite in flight, which can result in loss of main rotor control, power loss, structural damage, propagation of fire and subsequent loss of control of the helicopter.
Business jet manufacturers are quietly progressing toward more-electric architectures, where electricity replaces hydraulic and pneumatic power in systems such as brakes, landing gear or even control-surface actuation. This avoids the use of environmentally unfriendly hydraulic fluids and ultimately should help reduce fuel burn.
Sikorsky Aircraft has selected Eaton Corp. (Stand No. P39) to design and manufacture the primary hydraulic power generation system for the U.S. Marine Corp’s new heavy-lift CH-53K helicopter.
During the development phase of the program, which runs through 2014, Eaton will provide the systems and components for five to 10 shipsets, in addition to a number of test sets. The Marines expect to buy more than 156 CH-53Ks.
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