Gulfstream Large Cabin Services

Duncan Aviation provides maintenance service and support for GII, GIII, GIV, G300, G400, G450, GV, and G550 models. Our capabilities include airframe services, sales, inspections, AOG services, avionics install, paint & interior, engine & APU, and parts & components.

Our Gulfstream large cabin teams consist of A&P and IA-qualified aircraft inspectors, Chapter 5 research experts and factory-trained specialists who are available around the clock to help with maintenance-related questions, support and troubleshooting.

If you don’t see the service, certification or authorization you need, please contact us for more information.


GIV (post MSG-3), G300, G400, G450, GV and G550 models

  • 1A through 20A
  • 1C through 16C
  • 24-, 48-, 72-, 96-, 144-, 192-month
  • 5000-cycle

GII, GIIB, GIII and GIV (pre-MSG-3) models

  • Hourly and calendar
  • 5000 cycle inspections

Gulfstream Airframe Experience:

  • Major structural repairs and alterations
  • Sponson plate replacement
  • Major fuel tank corrosion repairs
  • Wing attach fitting replacement (3-piece box fitting)
  • Horizontal stabilizer steel strap replacement, repairs and attach fitting oversizing
  • Vertical stabilizer removal and inspection
  • Horizontal stab pivot fitting oversizing
  • Landing gear forward and aft lug oversizing
  • F.S. 793 single cress cap angle replacement
  • Wing demate and replacement
  • Special mission modifications
  • Vertical attach fitting oversizing
  • Baggage door repairs

Engineering Designations

We have a qualified staff of more than 40 unit members of all disciplines.

Areas of delegated authority:

  • Organization Designation Authority (ODA)
    • Supplemental Type Certificates (STC)
    • Major Repairs and Alterations (MRA)
    • Parts Manufacturer Approvals (PMA)
    • Imports, Exports, Special Flight Permits, Standard and Special Airworthiness

Avionics Installation

Duncan Aviation is the recognized leader for avionics. We offer complete avionics installations, including:

  • High-Speed Data upgrades
  • Complete radio packages
  • Flight management systems
  • HF systems
  • Cabin management systems
  • Enhanced Vision Systems
  • Cockpit refurbishment
  • LED lighting upgrades
  • Inmarsat Satcom systems
  • Cabin entertainment packages (audio & video)

Available STCs


  • RAAS software upgrade
  • Rockwell Collins TCAS 4000
  • Heads-up checklist EMTEQ LED lighting


  • AlliedSignal EGPWS Mark VII and Mark VIII with windshear
  • AlliedSignal CAS-67A TCAS II


  • Goodrich GH3000A Stby Attitude Inst System
  • Universal TAWS with MFD-640
  • AlliedSignal EGPWS Mark VII and Mark VIII with windshear
  • Rockwell Collins TCAS-4000 TCAS II
  • AlliedSignal CAS-67A TCAS II

Engine & APU

Duncan Aviation’s Rolls-Royces turbine engine technicians are supported by a wide range of back shop capabilities, including NDT and machining.

Our 24-hour network of AOG engine technicians is strategically located across the United States and capable of supporting many in-house line services on the road, such as scheduled—fan balance and vibration surveys

In-House Capabilities

  • Engine removal and reinstallation (R&R)
  • Routine maintenance
  • Borescope inspection
  • Vibration survey equipment
  • 24/7 technical support for troubleshooting and technical assistance
  • Non-Destructive Testing (NDT): BR-700 ultrasonic inspection of fan disc



Rolls-Royce BR700-710:

Line—Battle Creek, Mich. (BTL)/Lincoln, Neb. (LNK)

Rolls-Royce Spey / Tay:

Line—Battle Creek, Mich. (BTL)/Lincoln, Neb. (LNK)


Honeywell GTCP36-100 and GTCP36-150 series

Line, HSI—Battle Creek, Mich. (BTL)/Lincoln, Neb. (LNK)

Honeywell RE220 Series

Line—Battle Creek, Mich. (BTL)/Lincoln, Neb. (LNK)

Maintenance Service Plans

  • JSSI


Duncan Aviation is a leader for interior refurbishments on Gulfstream models. Our team members can update the design of your interior to add value, functionality and renewed comfort that must be seen and experienced to be appreciated.

  • Custom interior shell packages
  • Custom drinkrails
  • Custom executive tables with inlays
  • VIP in-arm monitor
  • Custom berthable divan and lightweight, articulating, reclining executive chairs
  • Custom thermal and acoustic insulation packages
  • Custom cabinets and finishes
  • Cabin reconfiguration
  • LED lighting
  • Entertainment switch packages

View Gulfstream Refurbishment Gallery


Duncan Aviation is famous for its high-quality paint jobs on Gulfstream models. We’ve earned this reputation over the years by consistently delivering high-quality, long-lasting paint, as well as through the unmatched attention to detail and innovative paint processes we employ. We offer the shortest downtimes in the industry; we can repaint a large-cabin Gulfstream in as little as 21 calendar days.

Our full-service paint facilities in Lincoln, Nebraska, and Battle Creek, Michigan, create optimum paint environments with air-filtration systems, temperature-control systems, humidity-control and airflow systems that allow consistently high-quality finishes.


  • Three year warranty
  • High solids primers and paint
  • Highly refined application process
  • A professional designer dedicated to your project works with you through every phase
  • State-of-the-art paint booths reduce rework and produce a very high-quality product
  • Environmentally friendly paint and strip hangars accommodate all models
  • Paint detail team details your aircraft prior to delivery
  • Experience painting private and corporate aircraft since 1979


  • Aircraft painted every five years maintain higher market values
  • Materials have a proven performance on all surfaces, including composites
  • Flexible agents ensure maximum protection
  • Proper application prolongs the lifetime of a finish

View Gulfstream Refurbishment Gallery

Parts & Rotables Sales

Duncan Aviation is the largest aircraft parts and components service organization in the business aviation industry; offering overhauls, repairs, rotables, loaners, exchanges, outright units, avionics, instruments, and technical support to aircraft operators around the world.

We have authorized in-house repair capabilities on more than 45,000 different units and a huge inventory with more than 485,000 line items valued at more than $45 million.

If we don’t have it in stock, we will find it for you. Our parts sales reps boasts over 500 years of combined experience in aviation and are available 24/7/365 to serve our parts customers, both domestic and international.

Contact us 24/7/365 for all your parts and rotables needs.
+1 402.475.4125 | 800.228.1836

Components Repairs & Overhauls


Fast turntimes and expedited AOG services

Manufacturer authorized sales, service and support:                     

  • Batteries/power supplies
  • Electronics
  • Electromechanical
  • Pneumatics
  • Hydraulic fluids/fuel
  • Landing gear
  • Non-Destructive Testing (NDT): eddy current, fluorescent penetrant, ultrasonics, magnetic particle
  • Machine Shop service and weld repairs

Contact us 24/7/365 for all your aircraft accessories needs.
+1 402.475.4125 | 800.228.4277

Avionics & Instruments

Duncan Aviation Avionics and Instruments shop will inspect, install, troubleshoot, service and repair virtually every type of equipment your aircraft might have, or need to have while on board with fast turntimes and expedited AOG services

FAA Repair Station – #JGVR194F

  • Radio - Class 1, 2 & 3
  • Instrument - Class 1, 2, 3 & 4

Factory authorized service, sales & support areas:

  • ADF
  • Radar
  • Autopilot
  • DME
  • Indicators                                
  • Calibration                                       
  • Pitot Static                                       
  • Gyros                                                
  • XPDR

Contact us 24/7/365 for all your avionics & instruments needs.
+1 402.475.2611 | 800.562.6377

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