All posts tagged 'AOG'

Beechjet Landing Gear-Falling Into Place

Specific Repairs for Proper Beechjet Landing Gear Operation

Brian McKenzie-Elliott Aviation Accessory Shop Manager
www.elliottaviation.com

Image of Repaired Bushing

A Beechjet is a unique airframe as it does not have a pneumatic blow down for landing gear. It primarily relies on airspeed and gravity. When the landing gear and trunnion have been maintained and repaired properly, this is never an issue. However, if the trunnion bearings are not aligned properly a slow wear eventually causes it to bind requiring repair to the trunnion bearing journals of the main landing gear.

Last year we had an AOG situation with a customer located in Caracas, Venezuela, that required this repair. The customer ran an approach to Miami and did not have all three landing gear down and locked. They cycled the landing gear a couple of times with no luck. They declared an emergency and proceeded to land anyway. As they taxied to the FBO, the line service technician noticed the left side main landing gear was not locked. They brought the aircraft in for swing tests and discovered that the left side landing gear was not swinging freely, in fact, it would fall only 7/8ths of the way down and not lock.

The aircraft was ferried back to its home base to trouble shoot the landing gear. They found that the landing gear would not pass the free fall test and removed the affected landing gear from the aircraft. During inspection of the trunnion, they found the forward trunnion bearing was seized and needed to be replaced. In this particular instance, there was an initial repair of the trunnion bearing journals where the bore was not reamed correctly and an oversized bearing was installed. This caused a misalignment, which ultimately caused the bearing to seize and the landing gear to not fall freely.

In this instance, the customer was very lucky. In these situations, the landing gear can collapse on landing or turns. In order to provide on our core values of Unmatched Quality, Uncompromising Integrity and Unbeatable Customer Service, I traveled to Venezuela amid political turmoil just days after Hugo Chavez’s death to make the repair. The aircraft was returned to service in less than five days and I returned two days before the Venezuelan Presidential election.

Another instance where this repair applies is when the factory bearing bore is enlarged due to repeated landings. If the bearings do not have an interference fit, this repair must be done in order to prevent further damage to the airframe.

At Elliott Aviation, we have seen this issue occur at least a half a dozen times in Beechjets. Properly repairing this requires pinpoint accuracy of lining up the bearing bore to the opposite side and our specialized tooling is centered between both pieces. In fact, we have developed a special tooling system that includes a series of reamers, specialized bushings and NDT capabilities to ensure the repair is handled correctly.

Brian McKenzie started with Elliott Aviation in 2007 as a Quality Control Inspector and led the development of Elliott Aviation’s Accessory Shop in 2011. He received his A&P in 2004, IA in 2009 and ASNT NDT Level III in 2010. Brian started his career in the US Navy where he was part of the fixed wing and rotor wing maintenance and aircrew. He has maintained airframes and components on a diverse number of aircraft including Beechcraft products, Gulfstreams, Citations, Falcons and helicopters. Brian has also worked for Aero Air, Evergreen International, Flightcraft and Jet Services Inc.

Elliott Aviation is a second-generation, family-owned business aviation company offering a complete menu of high quality products and services including aircraft sales, avionics service & installations, aircraft maintenance, accessory repair & overhaul, paint and interior, charter and aircraft management. Serving the business aviation industry nationally and internationally, they have facilities in Moline, IL, Des Moines, IA, and Minneapolis, MN. The company is a member of the Pinnacle Air Network, National Business Aviation Association (NBAA), National Air Transportation Association (NATA), and National Aircraft Resale Association (NARA).

Traceability Equals Peace of Mind

Getting Exactly what You Want from Your Parts Vendor

Thomas Rountree – Parts Manager for Elliott Aviation
www.elliottaviation.com

Everyone wants to have a hassle-free shopping experience and shopping for aircraft parts is no exception. It’s likely that you and your company are short on time and resources so the less time you have to research aircraft parts, the better, especially in an AOG situation. This is where a computer maintenance management system can save you dozens of hours.

If your parts dealer has a good computer maintenance management system, they will be able to tell you the history of that aircraft part from the time the order was placed, what work order it went on, when it was installed, or who it was sold to. It also allows them to trace a specific part to a serial number or lot number sequence so you know how close in age available parts are to the one you have specified.

I recently had a customer experience a computer problem in his airplane and he wanted to know the serial number of the part. At the time, he either wanted his existing equipment repaired or exchanged for a newer model. With just the serial number of his aircraft, we were able to give him options in less than a minute and shipped him a loaner to install the following day while we repaired his faulty device.

A good computer maintenance management system can also help you if you happen to lose your trace documentation. Any reputable company with a good system could replicate and send you the documentation in a matter of minutes. It can also provide you with logbook/date of installation validation. Ultimately, it saves you a lot of hassle. You are the customer; make sure your parts supplier is taking the time to do the research on your behalf.

Thomas Rountree started in logistics when he joined the US Army at the age of 18. His entire career has revolved around that field, including 25 years in retail distribution. He joined Elliott Aviation in 2006 as a shipping-receiving associate, after one year he moved into the Avionics procurement group. A short year later he became the Parts Department Manager and was later promoted to Material Support Manager. He is currently the Director of Parts & Component Services overseeing the Parts Departments, Accessory Shop and Elliott Parts Sales (EPS) group for Elliott Aviation, Inc. ).

Elliott Aviation is a second-generation, family-owned business aviation company offering a complete menu of high quality products and services including aircraft sales, avionics service & installations, aircraft maintenance, accessory repair & overhaul, paint and interior, charter and aircraft management. Serving the business aviation industry nationally and internationally, they have facilities in Moline, IL, Des Moines, IA, and Minneapolis, MN. The company is a member of the Pinnacle Air Network, National Business Aviation Association (NBAA), National Air Transportation Association (NATA), and National Aircraft Resale Association (NARA).

End of content

No more pages to load