Our in-house engineering and design department has the capability to complete any STC requested for your aircraft.

    Constant Aviation NHRA Factory Stock Showdown Logo


    Avionics Systems Engineering includes everything from cockpit EFIS retrofit solutions to cabin management systems (CMS/IFE) integrations.

  • Satcom and connectivity solutions
  • Electrical load calculation and analysis
  • System safety analysis
  • Electrical interconnect schematics
  • EWIS analysis
  • EMI analysis and test plans
  • Aircraft flight manual supplements (AFMS)
  • Electrical power systems and distribution systems
  • Interior lighting upgrades
  • Exterior lighting upgrades
  • Flight Management System (FMS) installation and upgrades
  • On-wing testing/troubleshooting/configuration support
  • TPED testing
  • Engineering Orders (support for deviations to existing approved data)


Constant Aviation specializes in major repairs and alterations for 14 CFR part 43, and support to FAA certified repair stations under 14 CFR Part 145. Aircraft modifications include but are not limited to antenna installation design and analysis (including damage tolerance), powerplant changes, electrical systems and analysis, custom cabin interiors and seating, and structural and electrical aircraft repairs.

  • Collins Aerospace Pro Line 21 – Textron 400A and 400T
  • Pro Line Fusion – Bombardier CL-600-2B16
  • Honeywell Primus 1000 – Embraer Legacy 600/650
  • Honeywell Primus 2000 – Textron Model 750 (Citation X)
  • Garmin G1000 – King Air C90
  • Interior Alterations
  • Floor plan change – Global Express/XRS
  • Floor plan change – Gulfstream GIV/G450/G650
  • Floor plan change – Learjet 45
  • Floor plan change – Embraer Legacy 600/650
  • Floor plan change – 400A
  • LED Lighting upgrade – Challenger 604, 400A/400XTi
  • Collins Aerospace Venue
  • Honeywell Ovation
  • Tailwind Satellite TV
  • Embraer Legacy 600/650
  • Bombardier Challenger 604
  • Gogo High Speed Internet
  • Satcom Direct Router
  • Inmarsat Swift Broadband
  • Viasat KU-Band
  • Honeywell Ka-Band

    MakeModelSTCDescriptionMaster Data List Document NumberOriginal TCDS
    Hawker Beechcraft Corp400AST10959SCInstallation of Rockwell Collins Pro Line 21 Electronic Flight Instrument System (EFIS) with Rockwell Collins FMS-6100373-00-0001A16SW
    Boeing737-2H4/B737ST03196CHActivation of an existing Aircell Axxess Cabin Telecommunications Router (CTR) Wireless Local Area Network Access Point (WAP) (WLAN (IEEE 802.11 b, g, and n only)) DB1208011A16WE
    Bombardier IncBD-700-1A10, BD-700-1A11ST04054CHInstallation of Aircell® ATG-2000, ATG-4000 or ATG-5000 with Cabin Telecommunications Router and optional HD-710 High Speed Data Terminal and/or Satcom Direct Cabin Router with HD-710 High Speed Data Terminal DB1408013T00003NY
    Cessna Aircraft Company750, S/N aircraft 750-0001 thru 750-0499 onlyST03957ATActivation of Aircell Axxess Cabin Telecommunications Router (CTR) Wireless Local Area Network (WLAN)DB1107001T00007WI
    Embraer S. A.EMB-135BJ (Legacy 600 and Legacy 650)ST04138CHInstallation of Datalink Communications System supporting Air Traffic Services (ATS) using Iridium Satcom, and upgrade to Honeywell MK-III Communications Management Unit (CMU) for CPDLC Capabilities and CVR 120A for data link recording in accordance with Constant Aviation LLC Master Data ListDB1503020T00011AT
    EmbraerEMB-135ER, EMB-135LR, EMB-135BJ (Legacy 600 and Legacy 650)ST03889ATInstallation of Aircell Axxess Cabin Telecommunication Router (CTR) with Wireless Local Area Network (WLAN) in accordance with Constant Aviation LLC Master Drawing List DB1002058T00011AT
    EmbraerEMB-145, EMB-145ER, EMB-145LR, EMB-145XR, EMB-145EPST04108CHInstallation of Gogo Business Aviation ATG-8000 High Speed Internet with Wireless Local Area Network (WLAN)DB1511001T00011AT
    Embraer S.A.EMB-500/Phenom 100 Wi-FiSA04171ATInstallation of Thrane and Thrane Aviator 200 Swiftbroadband System and/or Aircell Cabin Telecommunications Router with Wireless Local Area Network (WLAN) in accordance with Constant Aviation LLC, Master Drawing List DB1309002A59CE
    EmbraerEMB-505 (Phenom 300)SA03956ATInstallation of Avance L5/L3 Aircraft High Speed Internet system, ATG Broadband Internet System, Aircell Axxess Satcom, or Aviator 200 Swift Broadband Internet systemDB1008002A60CE
    Gulfstream AerospaceG-IVST03869ATInstallation of Aircell Axxess Cabin Telecommunication Router (CTR) with Wireless Local Area Network (WLAN)DB1002049A12EA
    Beechcraft Corporation400AST03473CHInstallation of the Safe Flight AutoPower® Automatic Throttle System (ATS)NX0024-MDL0-0000A16SW
    Hawker Beechcraft Corporation400AST03960ATInstallation of Rockwell Collins Venue In-Flight Enter tainment(IFE), Aircell Axxess Cabin II Iridium Phone and High Speed Internet System with Wireless Local Area Network (WLAN) Astronics 115VAC 60HZ Cabin Inverter, and Emteq LED Cabin Lighting System in accordance with Nextant Aerospace LLC, (EASA #10040905)DB1002067A16SW
    Beechcraft Corporation400AST03389CHInstallation of Honeywell KHF-950 High Frequency Communication System with Optional Avtech CSD-714 SelCal Decoder in accordance with Nextant Aerospace Master Drawing List DB1304006A16SW
    Hawker Beechcraft Corporation400AST03256CH Activation of Aircell Cabin Telecommunications Router System with Wireless Local Area Network (WLAN (IEEE 802.11b/g/n 2.4-2.48 GHZ band only)) in accordance with Constant Aviation Master Drawing List
    Hawker Beechcraft Corporation400AST02371LAAlteration of a Beechcraft Corporation 400A airplane, to replace Pratt & Whitney JT15D-5 series engines with Williams International FJ44-3AP engines (TCDS E3GL) with Full Authority Digital Engine Control. (FADEC)MDL-NXT-001A16SW
    Hawker Beechcraft Corporation400AST02371LAThe installation of Nextant Winglets.MDL-NXT-001A16SW
    Hawker Beechcraft Corporation400AST03110CHInstallation of L3 Communications Digital Flight Data Recorder in accordance with Nextant Aerospace LLC Master Drawing List. (EASA #10040906) NX1111001A16SW
    Hawker Beechcraft CorporationBAe.125 Series 800A, Hawker 800, Hawker 800XP, Hawker 850XP,
    Hawker 900XP, HS.125 Series 700A, BAe.125Series 1000A,
    Hawker 1000, Hawker 750
    ST03139CHInstallation of Aircell Axxess II Iridium Satcom and High Speed Internet with Wireless Local Area Network (WLAN (IEEE 802.11 b, g, and n only))
    Learjet45, S/N 45-002 through 45-455ST00786DEInterior modification that includes re-arrangement of the existing interior components into a new interior floorplan arrangement (6 PAX), with new component configurations
    Learjet Inc.45 (Learjet 45, Learjet 40, Learjet 75, Learjet 70)ST04030CHInstallation of Aircell ATG-2000/4000/5000 High Speed Internet with Wireless Local Area Network (WLAN) in accordance with Constant Aviation LLC Master Data List Document DB1450009T00008WI
    Raytheon Aircraft Company100, A100SA02036CHInstallation of two Walter a.s. Model M601E-11A engines and AVIA propeller model V510/90A/B five bladed propellers in accordance with Premier Conversions, LLC Installation Manual and Master Drawing List.A14CE
    Textron AviationC90ASA01902CHInstallation of two General Electric Model H75-100 engines with Electronic Engine Control (EEC) and Electronic Propeller Governor (EPG), Interface to Garmin G1000 and installation of a new Cabin Pressure Control System, Vapor Cycle Air Conditioning System, and additional enhancements.NX0250-MDL0-00003A20
    Embraer S.AEMB-135BJ (Legacy 600 /650), EMB-135LRST04327CHAML STC for the Installation of the High Speed Internet System and Wireless Activation on Embraer S. A. EMB-135BJNT0018-MDL0-0002
    Textron400, 400A, 400TST04279CHInstallation of Exterior LED Lights AS0003-MDL0-0100A16SW
    Bombardier Inc.BD-700-1A10, S/N 9002 through S/N 9139ST00876DEInterior modification in accordance with Lee Products Engineering Services, Inc.349-MDL-001T00003NY
    Embraer S.A.EMB-145, EMB-145ER, EMB-145MR, EMB-145LR, EMB-135ER, EMB-135LR, EMB-135KE, EMB-135KL, EMB-135BJ, EMB-145XR, EMB-145MP, EMB-145EPST04282CHInstallation of Honeywell CD-830 Control Display Unit (CDU)AS0012-MDL0-0100T00011AT
    BombardierCL-600-2B16ST04356CHInstallation of Pro Line Fusion Electronic Flight Instrument System (EFIS)NT0016-MDL0-0100A21EA
    BombardierCL-600-2B16ST04357CHInstallation of an Enhanced Safe Flight AutoThrottle System (ATS)NT0017-MDL0-0100A21EA
    Textron400A, 400TST04294CHInstallation of a True Blue TS835 Emergency Battery Power SupplyNX0063-MDL0-0100A16SW

    Engineering/STC Specialist contact info

    Contact Lane Clapsaddle at 216.262.5391 for assistance.