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The Duncan Download Blog: Business Aviation Advice & Observations

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Airframe Corrosion Does Not Discriminate

Posted by Duncan Download Blog on Tue, Apr 18, 2017 @ 10:39 AM

Corrosion doesn’t care what make/model aircraft you have or how many flight hours it sees. All it cares about is getting its start and hoping you are not paying attention.

Types of Corrosion

Over the past 60 years, Duncan Aviation has seen and repaired corrosion damage on nearly every make/model business aircraft that has ever flown. Here are some common types of corrosion.

Filiform Corrosion: Occurs under painted surfaces when the protective coating has been compromised. The corrosion extends out from the original corrosion pit causing degradation of the protective coating.

Filiform Corrosion_a.jpgFiliform Corrosion_b.jpg

Galvanic Corrosion: An electrochemical action of two dissimilar metals in the presence of an electrolyte and an electron conductive path, causing corrosion. It can occur when dissimilar metals are in contact.

 Galvanic Corrosion_b.jpgGalvanic Corrosion_a.jpg

Surface Corrosion: Chemical or electrochemical attack on surface of metal. It is a general roughening, etching, or pitting of the surface of a metal.

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These photos are evidence of severe neglect. At Duncan Aviation, we have seen issues like this on business aircraft left outside quite often and subjected to the salt air (ocean air) without regular preventive maintenance and inspections for corrosion. 

Paint only needs to crack once to allow oxygen and moisture to get underneath and deteriorate the surface protection. Typically, this occurs anywhere there is a seam on the fuselage, wing, empennage or flight control surface. Corrosion remains hidden by the painted surface, or has been touched up with paint over the surface, trapping the growing corrosion underneath.

These examples of airframe corrosion could occur anywhere on the aircraft that the metal is not protected.  If the anodizing, alodine, or other surface protection is missing in that area, then surface corrosion, galvanic, (dissimilar metal) corrosion, or other forms of corrosion can occur.

It is very important to maintain the surface protection, and to perform regular inspections of all areas to detect corrosion before it grows.


This article is from the April issue of the Duncan Intelligence, a free, technical newsletter for business aircraft owners and operators. Written in-house by Duncan Aviation's aviation experts. It is a free, monthly e-mail subscription for aviation enthusiasts around the world.

Subscribe Now

Tags: airframe corrosion

Facing The Challenges of Business Aircraft Interior Customization Head On

Posted by Duncan Download Blog on Thu, Apr 13, 2017 @ 08:00 AM

Doing exactly what customers want can be exciting, if a bit challenging. However, every time they have asked, we have answered in a big way.

During a pre-buy inspection, one of Suzanne Hawes, Senior Sales Representative for Completions and Modifications in Battle Creek, Michigan, customers told her he wanted the Falcon 900 cabin seating reconfigured from 14 seats to 17. He also wanted to drop the overall weight of the aircraft so the round-trip customer flights he was planning could be completed with no fuel stops.

The reconfiguration required an STC (Supplemental Type Certificate), and Suzanne says team members from Engineering, Airframe, and Interior met with her, Project Manager Rich Jones, and Designer Ken Reita almost daily to compare notes and ideas after the initial meeting with the customer, his wife, and his aviation department.

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“We had spreadsheets that we updated regularly with the weight of every single item, including coffee containers and life rafts, on that aircraft. We even took out the carpet and weighed it!” says Suzanne. “We pored over that interior, coming up with savings, ounce by ounce.”

The team worked with Skandia, Inc., for the sound-proofing materials, saving 50 pounds by swapping out a different vendor’s insulation in the headliner. By removing a pocket door, switching the seat and divan frames for lighter-weight versions, and replacing the stone countertops in the galley cabinet with sleek lightweight laminate, the team ultimately fit 17 seats comfortably in the cabin and shaved 374 pounds from the aircraft’s weight!

Tags: Interior Refurbishment

Duncan Aviation Releases April Duncan Intelligence

Posted by Duncan Download Blog on Thu, Apr 06, 2017 @ 03:40 PM

Were you aware an important Airworthiness Directive is coming due at the end of the year? How about how what could cause your transponder to reject the beacon signal from Air Traffic Control?

No? Then you haven't read the April issue of the Duncan Intelligence. 

April Duncan Intelligence

Corrosion Does Not Discriminate

Corrosion doesn’t care what make/model business aircraft you have or how many flight hours it sees. All it cares about is getting its start and hoping you are not paying attention.

TFE731 Engine Airworthiness Directive Compliance Coming Due in October 2017

To be eligible for any OEM warranty consideration, affected engines need to comply by October 1, 2017.

Aircraft Compass System Alignment Formulae

If you replace or change the magnetic compass or components on your aircraft’s compass system, it is appropriate to swing the compass to verify or align it to minimize errors.

TDR-94/94D Common Failures: Transponder Off Frequency

If the transponder on your business aircraft is off frequency, it could begin to reject the beacon from ATC.

Flat Rate Exchanges Help To Avoid Over and Above Charges

0xygen masks are an accessory that we hope we never need. But if the cabin pressurization system fails and our altitude is above safe levels, we really want those masks to work correctly.

 
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Duncan Aviation’s Kansas City Shop Upgrades Gulfstream G150 for ADS-B

 Read more.

 

Duncan Aviation Main Facilities Currently Performing Global Pre-Purchase Evaluations

The Duncan Intelligence is a free, technical newsletter for business aircraft owners and operators. Written in-house by Duncan Aviation's technical representatives, each edition includes technical tips and advice on topics and trends in business aviation. It is a free, monthly e-mail subscription for aviation enthusiasts around the world.

Subscribe Now

Tags: Announcements

ADS-B Mandate by the Numbers

Posted by Duncan Download Blog on Tue, Mar 28, 2017 @ 09:00 AM

ADSB Now small.jpgDuncan Aviation estimates that roughly 6,000 of the business jets in its core customer base still need ADS-B. That paints a pretty urgent picture of the industry. However, when you consider that ADS-B affects ALL aircraft, it's an even more dramatic picture. The number of U.S.-based turbine aircraft that still need ADS-B is closer to 11,000 and the number of all U.S. aircraft that still need ADS-B is closer to 74,000.

Brian Redondo, Duncan Aviation's Ft. Lauderdale Satellite Shop Manager, explains why he is concerned about the shortage of qualified installation labor.

"During the RVSM mandate compliance phase, shops performing RVSM installations could hire technicians from other shops that were slow because their core customers were not affected by the mandate. That won't be possible with ADS-B because every installation shop will be performing these installations for many years to come. And honestly, there is already a shortage of skilled labor as it is."

Operators need to begin looking at their paths for compliance and schedule the work needed, and soon. This video will highlight some of the key figures about why you need to be thinking about your upgrade now.

Tags: Avionics Installation, ADS-B, NextGen

Duncan Aviation Does Not Go Unnoticed at Heli-Expo 2017

Posted by Duncan Download Blog on Tue, Mar 21, 2017 @ 11:00 AM

Duncan Aviation set out once again to make its presence and services known to the larger helicopter world at the 2017 Heli Expo in Dallas, Texas.

Just like 2016, we were greeted with enthusiasm, professionalism, and curiosity. But two things stood out to Ken Hurd, Duncan Aviation Accessories Technician that made this year’s show different.

  1. A Lot More People

“This year's show was promoted as bigger than ever, and the size of the crowds seems to confirm the show as one of the best attended.”

  1. More People Recognized Duncan Aviation

“During the show we were more widely recognized as a company that supports rotor wing accessories and avionics. Attendees visited the Duncan Aviation booth and shared their ideas on how we could take advantage of our impeccable reputation and abilities in the business aviation industry to expand our presence in the helicopter industry.”

Avionics Technologies, Inc.jpgMike Kizziah with MOOG.jpgKenny from precise flight.jpg

Although we have been Heli-Expo attendees for several years, 2017 is the second year we had a show booth with team members representing areas that often touch helicopters or helicopter components. These areas include component repair and overhaul, parts sales and exchange, as well as the Government and Military contracts.

“I didn't know Duncan Aviation worked on helicopter components” was heard over and over again during the show. While it is true Duncan Aviation’s history is firmly grounded in the fixed-wing industry, we have been working on helicopter avionics for decades and the business is growing. 

Read about Duncan Aviation in the 2017 HAI Insight Magazine

According to Karl Detweiler, Duncan Aviation Components Business Development Manager, several attendees and exhibitors were glad to see Duncan Aviation expanding into helicopter components. “They expressed the need to have more long-term stability in the available service shops. To them, Duncan Aviation represents stability and quality."

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Since purposefully promoting the Duncan Aviation helicopter component business in 2016, the projected growth for 2017 has a positive outlook. In fact, by the end of Heli-Expo, every Duncan Aviation representative found new helicopter business for the company to add to its already expanding portfolio.

We will continue to work hard and continue to build our reputation into the helicopter industry.

Tags: Parts & Accessories

Duncan Aviation Releases March Duncan Intelligence

Posted by Duncan Download Blog on Thu, Mar 09, 2017 @ 09:00 AM

Have you heard about the Honeywell HTF7500E Stator Vane Seal Inspection Program? How about the cause behind those intermittent software failures on your Avidyne EX-500 MFD? 

No? Then you haven't read the March issue of the Duncan Intelligence. 

 March Duncan Intelligence

Falcon 7X Flap Rigging Precautions

 Caution is needed when rigging the flaps on a Dassaut Falcon 7X aircraft.

ADS-B Solution for Bombardier Challenger 800/850 SE Aircraft

 This was an industry-first installation in the United States and was performed in the customer’s hangar.

Honeywell HTF7500E Stator Vane Seal Inspection Program

 This inspection program is applicable to the HTF750E model engine.

Why Is My Avidyne EX-500 MFD Experiencing Intermittent Software Failures?

 Completing a proper shutdown every time will prevent this.

Got a crack in your APU Exhaust Support? Don’t Replace It. Repair It.

 Duncan Aviation has AWS D17.1 certified welders and inspectors on-site, all capable of welding all types of materials for aerospace applications.

The NBAA Tech Committee Wants To Hear From You

Progress can only be accomplished if we have regular interaction with and feedback from you, the Citation operator.

Get The Duncan Intelligence In Your In-box

The Duncan Intelligence is a free, technical newsletter for business aircraft owners and operators. Written in-house by Duncan Aviation's technical representatives, each edition includes technical tips and advice on topics and trends in business aviation. It is a free, monthly e-mail subscription for aviation enthusiasts around the world.

Duncan Intelligence Subscribe Now

Tags: Avionics & Instruments, Engine Maintenance, ADS-B, Falcon, Challenger

Honeywell HTF7000 Service Bulletin Update

Posted by Duncan Download Blog on Tue, Mar 07, 2017 @ 08:00 AM

For the Honeywell HTF7000 series engine model, there are a number of Service Bulletins that have become hot items. These can be accomplished at our Turbine Engine services shop in Lincoln, Nebraska, or any one of our Engine Rapid Response locations across the United States.

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SB AS907-76-9021

Issued on May 13, 2016, this SB addresses the possibility of water entering the ECUs (Electronic Control Unit) after the aircraft is parked in the rain for an extended length of time. This may lead to unscheduled maintenance and expenses, aircraft dispatch delays, Loss of Thrust Control (LOTC) events and the possibility for inflight shut downs.

This is a CAT 1 SAFETY SB meaning it may require urgent action and may be associated with an FAA AD (Airworthiness Directive). Compliance is recommended to be within 400 engine operating hours or 18 months from the date the SB was issued.

This SB is relevant to the following aircraft:

  • Bombardier Challenger 300/350 (HTF 7000/HTF 7350)
  • Gulfstream G280 (HTF 7250)
  • Embraer Legacy 450/500 (HTF 7500)

SB AS907-72-9064

This SB was issued to address instances of corrosion and pitting found in the inner and outer bypass ducts and supports. This SB will inspect and evaluate the corrosion and pitting of the FWD and AFT Ducts as well as the Core Cowls. If corrosion is noted, we will perform a repair to add a coat of paint as a preventive barrier for future contamination.

Because this SB requires the removal of the forward and aft outer fan bypass duct(s) and mid and aft inner fan duct panels, it should be scheduled during a maintenance event that will have the aircraft down for 7 to 10 days. I recommend accomplishing SB AS907-72-9044 at the same time, if applicable and you meet the required interval per the bulletin. Another good time to schedule this bulletin is during a 4000 hour digital borescope inspection. If repairs are noted from the borescope, most of these ducts and panels would be removed for the repair of the hot section components.

The SB applies to the following engines:

  • AS907-1-1A (Bombardier Challenger 300)
  • AS907-2-1G (Gulfstream G280)
  • AS907-2-1A (Bombardier Challenger 350)

HTF700_1SB AS907-72-9044

The SB replaces the engine combustion chamber assembly. I recommend you have this SB accomplished at the same time as the previous SB mentioned (SB AS907-72-9064), if applicable and you meet the required interval per the bulletin. Most of the same panels and ducts need to be removed for both.

SB AS907-76-9013 W5

This SB changes the location of the W5 & OSSD (Overspeed Shutoff Detector) wire harness to increase its reliability and prevent failure in the high-heat environment in the engine.

Honeywell Engine Technical Support

Shawn Schmitz-DA15090901.jpgShawn Schmitz

Engine Technical Representative

+1.402.479.8166 office

+1.402.730.8767 mobile

Shawn.Schmitz@DuncanAviation.com

Tags: Engine Maintenance

Nextgen Acronym Confusion

Posted by Duncan Download Blog on Thu, Feb 23, 2017 @ 08:30 AM

Every day we field questions from operators about the FAA’s NextGen initiatives. This tells us there is still significant confusion about the various acronyms associated with NextGen. 

What You Need to Know About the ADS-B Mandate

Here are some of the more common questions surrounding the many acronyms and which acronym applies to which solution.

ADS-B (Automatic Dependent Surveillance-Broadcast). A cooperative system that transmits digital information regarding the identity, velocity and position of the aircraft to ATC (Air Traffic Control). This is a mandated item. Every aircraft planning on flying in controlled airspace after December 31, 2019, will need to have ADS-B Out. To comply with the ADS-B Out mandate, aircraft need a 1090-MHz Mode S extended squitter transponder combined with a certified GPS (Global Positioning System) navigation source such as WAAS GPS. ADS-B In allows the aircraft to read ADS-B signals from other aircraft.

WAAS (Wide Area Augmentation System). A system developed to augment GPS with the goal of improving its accuracy, integrity and availability. Intended to correct GPS signal errors, WAAS collects data from ground stations and satellites, allowing aircraft to rely on GPS for all phases of flight, from takeoff through Category I precision approaches. WAAS permits the use of more fuel efficient flight planning and approaches that have reduced minimums. WAAS-approved units also incorporate navigation procedures to take advantage of preferential flight routing. To upgrade to WAAS, certified equipment appropriate for the aircraft must be installed and properly approved by the FAA or its designee.

FANS 1/A– (Future Area Navigation Systems). This is a datalink system that lets pilots and ATC communicate directly using text transmissions that appear on the CDU (Central Control Unit). It requires a certain level of navigational performance that your aircraft must meet in order to fly overseas while communicating with ATC via CPDLC.

CPDLC (Controller Pilot Data Link Communications.) This is the method of communications being used for operators flying overseas outside of VHF coverage. The aircraft must meet a certain level of precision and performance to fly in these assigned flight routes. CPDLC is the text-messaging component of FANS 1/A.

Still have questions?

Tags: Avionics Installation, ADS-B, NextGen, FANS 1A

Happy Holidays from Duncan Aviation

Posted by Duncan Download Blog on Tue, Dec 20, 2016 @ 09:36 AM

 

2016 was a special year. Thank you for being a part of it. 

Thank you for helping us celebrate 60 years of providing service to business aviation. We are proud of our family ownership and history of excellence, innovation and responsiveness. we are also truly grateful to have had the opportunity to work with you. We wish you a season of joy and the very best for 2017 and beyond.

 


da_60_logo_final-no text-02.jpgIt is Duncan Aviation’s 60th year of helping business aircraft operators be safe, efficient and productive. For six decades, customers have asked us for solutions and services. We are celebrating our 60 years by telling the stories about the people of Duncan Aviation who listened and took action.

Celebrate with us by subscribing to the Duncan Download blog, following us on Facebook and Twitter (@DuncanAviation) and visiting our anniversary website at www.DuncanAviation.aero/60.

60th Anniversary Website

Tags: Announcements, 60th Anniversary

Duncan Aviation Releases December Duncan Intelligence

Posted by Duncan Download Blog on Thu, Dec 15, 2016 @ 10:43 AM

Did you know that we have the exclusive rights to reconfigure AIM® 1100/1200 series attitude indicators and gyros to meet your platform requirements? 

Have you heard that legacy aircraft operators have another transponder option to meet the ADS-B mandates?  

No? Then you haven't read the December issue of the Duncan Intelligence.

Didn't receive the Duncan Intelligence? Subscribe Now

 
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HTF7000 Service Bulletin Update

There are a number of Honeywell HTF7000 SBs that have become hot items. These can be accomplished at our Turbine Engine services shop, or any one of our Engine Rapid Response locations across the United States.

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Don’t Delay When Sending Control Rod Assemblies In For Repair/Overhaul

If these units are ever pulled for operational failure, they should be sent in immediately for evaluation. The longer they sit, the more likely corrosion will invade causing more problems at disassembly.

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NXT-700 Mode S Transponder Satisfies the DO-260B Mandate for ADS-B

The ACSS NXT-700 AML STC is complete and ready to meet the ADS-B mandate for many legacy aircraft operators.

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AIM (Extant) Attitude Indicators Repair/Mod/Loaner Capabilities

We have the exclusive rights to reconfigure these loaner units to meet the lighting, power configurations, and tilt angles based on your platform requirements.

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Keeping Out-Of-Production Parts Available

When these units require replacement, your only options are to: 1) buy a whole new servo unit or 2) upgrade the entire avionics package of the aircraft.

Tags: Parts & Accessories, Avionics & Instruments, Engine Maintenance, NextGen

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