Aerometals has received PMA approval for spiral bevel gears for the main rotor transmission of the MD500. According to the company, the approval marks the first time the FAA has granted manufacturing approval for transmission gears to a company that is not the OEM. The testing required a test stand using a 500-hp electric motor instead of a gas turbine. The MD transmission is rated for 425 hp for up to five minutes, but Aerometals ran the gears for eight hours at 467 hp to satisfy FAA testing requirements.
Mecaer Aviation Group has been selected by Eurocopter to design and manufacture the landing gear shock absorbers for the new-generation X4 helicopter. The company is responsible for the design, engineering, certification, production and after-sales support of the landing gears, and will provide to Eurocopter the absorbers for the nose landing gear and the two main landing gears, in addition to the nose landing gear electrical wheel lock actuator.
Duncan Aviation technicians can now provide faster landing-gear inspections, restorations and overhauls by using a new digital Fryer Touch 2100 Control machining mill. It allows technicians to machine landing-gear castings and other large parts with better accuracy and efficiency. Duncan Aviation completes landing-gear restorations and overhauls for Challengers, Hawkers, Learjets and King Airs, both in conjunction with in-house airframe inspections and for units that are removed and sent in for service.
West Star Aviation has acquired a roll-around Challenger 600/601/604/605 landing gear ship set that allows it to reposition aircraft with the gear removed. Dave Krogman, general manager for the Grand Junction, Colo. facility, told AIN, “We can now move the aircraft into the paint shop instead of having it sit on the floor waiting for its gear to be reinstalled. Roll-around gear means decreased downtime during gear swaps and multi-shop events.” West Star Aviation can also perform in-house landing-gear overhaul/repair on the Challenger 300/600/601/604.
Mecaer Aviation is to design and manufacture the landing gear system for Bell Helicopters’s new 525 Relentless twin. The Italian company, which already provides landing gear for the existing 429 model, will be responsible for engineering, system integration, and the production of a complete ‘bolt-on’ system, comprising nose and main gears, electro-mechanical actuation, the braking system, wheels, tires and control panel. Mecaer also provides landing gear for AgustaWestland.
The FAA is adopting an airworthiness directive for certain Pratt & Whitney Canada PT6A-38, -41, -42, -42A, -61, -64, -66, -66B, -110, -112, -114, -114A, -121, -135, and -135A series turboprop engines. The AD requires the removal from service of certain PMA replacement parts from Timken Alcor Aerospace Technologies, including first-stage sun gears and planet gears installed in the reduction gearbox. This AD was prompted by failures of certain first-stage sun gears manufactured by Timken Alcor.
The FAA is adopting an Airworthiness Directive (AD 2012-08-11) for certain Bombardier Dash 8-400 turboprop aircraft, to alleviate potential landing gear issues. The problems were identified during testing, which showed that failure of a retract-port, flexible hose on the main-landing-gear actuator could result in excessive leakage of hydraulic fluid.
An emergency Airworthiness Directive issued by Transport Canada yesterday calls for further inspection of Bombardier Q400 main landing gear (MLG) after line checks uncovered two cases of cam mechanism failure in the gear's alternate extension system (AES). The cam mechanism operates the cable to open the main landing gear door and releases the MLG uplock in sequence.
Aggressive cleaning of aircraft landing gear may shorten the life of landing gear components, according to Duncan Aviation accessory tech representative Jerry Cable. Water, dirt, debris and foreign objects can act as electrolytes, he said, “producing a corrosive environment,” and possibly leading to premature removal of components.
While focused on delivering geared turbofan (GTF) engines for the new Mitsubishi MRJ and Bombardier C Series, Pratt & Whitney is turning its attention to the wider applications of a technology that offers a 12- to 15-percent improvement in fuel burn by allowing the engine fan and low-pressure turbine to operate at optimum speeds.
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