FAA AML STC APPROVED PATH • PART 23 • PART 25 HERITAGE

Modernize Your
King Air Pro Line 21
for NextGen & Data Comm

Cost-effective Garmin GTN Xi integration via FAA AML STC.
Retain your existing Pro Line 21 EFIS. Add WAAS GPS RNP, and CPDLC readiness.

Explore the Solution Schedule Technical Discussion
7,000+ King Airs Worldwide
$7B+ NextGen Avionics Market
THE MARKET REALITY

A Multi-Hundred-Million-Dollar
Aftermarket Opportunity

The Beechcraft King Air fleet exceeds 7,000 aircraft worldwide, with thousands equipped with Collins Pro Line 21 avionics — the dominant platform in 200/300 series from the early 2000s through mid-2010s.

These aircraft require urgent modernization for:

  • NextGen compliance
  • FAA Data Comm (CPDLC)
  • RNP approaches
  • Enhanced safety & resale value
7,000+
King Air aircraft globally
$7B+
Commercial NextGen
Avionics Market
Projected ~8% CAGR
$500K+
Typical OEM
upgrade cost
Significant cockpit overhaul + lengthy downtime

Most existing OEM solutions require full EFIS replacement and supporting avionics. These programs are expensive, invasive, and keep aircraft on the ground for extended periods.

THE ARCHANGEL + CANNAN SOLUTION

A Turnkey, Cost-Effective
Path to NextGen Compliance

Archangel Services Corp. has teamed with Cannan Avionics to deliver an FAA AML STC-based upgrade that integrates modern Garmin GTN Xi series equipment with legacy Pro Line 21 aircraft — without replacing your existing EFIS.

Custom U1808 Interface Adapter

Proprietary software and hardware interface that bridges legacy Pro Line 21 EFIS and avionics to new Garmin GTN Xi navigators. The U1808 hardware has prior STC approval on Part 25 aircraft; Cannan is adapting it for Part 23 King Air platforms.

SEAMLESS FMS INTEGRATION

Replaces FMS Cards

The U1808 replaces existing FMS cards (FMC) in Pro Line 4 and Pro Line 21 aircraft, enabling 3rd-party FMS to interface cleanly with Collins-only systems.

Proven Hardware

U1808 Card already STC'd on Part 25 aircraft. Focused development effort is now on custom software certification and Part 23 adaptation for King Air.

Cannan Avionics U1808 FMC Interface Card for Pro Line 21 to Garmin GTN integration
CANNAN AVIONICS
U1808 FMC Interface Card
Learn more about U1808
King Air Pro Line 21 Cockpit with Garmin GTN Xi Integration - Modified Layout
SMART AVIONICS MODERNIZATION

What Gets Installed

A targeted, minimally invasive upgrade that adds modern capability while preserving your investment in the Pro Line 21 cockpit.

PANEL MOUNT

GTN 725Xi

6.9" GPS Navigator / MFD • WAAS/SBAS • Data Comm Enabled

  • RNAV / RNP Approaches
  • Software ver. 21.02 or later
  • FAA Data Comm feature enabled
  • iPad / Tablet interface ready
CONSOLE MOUNT

GTN 625Xi

4.9" GPS Navigator / MFD

  • Same core capability as GTN 725Xi
  • Without Data Comm feature
  • Perfect co-pilot / backup navigator
  • Reduces database costs from ~$5,000 to under $1,000
REMOTE

GDR 66 + GDL 69

VDL Mode 2 Data Comm + XM Weather

GDR-66 VHF Data Link (VDL) Mode 2 transceiver • S/W ver. 2.31
GDL-69 XM Weather (optional)
Garmin FAA Data Comm / GTN Xi Introduction
Play on YouTube →
FAA PMA QUALIFIED • TURNKEY

Complete Installation Package

Everything required for a compliant, airworthy installation — backed by continuing DER support.

STC Documentation & Support

  • License for FAA Approved Model List (AML) STC covering all King Air models using PL-21
  • Airplane Flight Manual Supplement (AFMS)
  • Instructions for Continuing Airworthiness (ICA) supplement
  • Illustrated Parts Catalog (IPC) supplement
  • Aircraft modification drawings & Engineering Order (EO)
  • Continuing engineering support for errors and corrections
  • FAA DER 8110-3 approval of minor deviations

FAA PMA Qualified Installation Kit

  • Custom U1808 interface adapter cards
  • Pre-fabricated panel replacement and hardware
  • Pre-fabricated console equipment mount
  • Pre-fabricated wire harness and cable assemblies
  • Circuit breakers, placards and labels
  • Antenna doublers
  • Relocate Radio Tuning Unit (RTU) to console
WHY THIS APPROACH WINS

Traditional OEM vs. Archangel Solution

Factor Traditional OEM Upgrade Archangel + Cannan Solution
Cockpit Impact Full EFIS replacement required Retains existing Pro Line 21 EFIS displays
Estimated Cost $200,000 – $400,000+ Significantly lower (contact for quote)
Aircraft Downtime Extended — major cockpit work Targeted & efficient installation
Data Comm Path Often requires additional major upgrades Built-in growth path via GDR-66 VDL Mode 2
Database Costs High (often $5,000+ annually) Reduced to < $1,000 with Garmin ecosystem
Certification Basis Often model-specific or complex FAA AML STC (covers entire PL-21 King Air fleet)
EXPERTISE YOU CAN TRUST

Why Archangel Services Corp.
+ Cannan Avionics

A powerful combination of deep FAA certification experience in special mission modifications and proven interface hardware technology.

20+ years DER experience
ARCHANGEL SERVICES CORP.
FAA DER • S-CORP • TROUTMAN, NC
Jon Shoemake, FAA Designated Engineering Representative with two decades of experience in special mission aircraft modifications, electrical avionics systems, and wiring. Archangel specializes in the design and certification of avionics and electrical systems integration, wire harness design, manufacturing, and installation kits for Part 23 and Part 25 platforms. We bring full DER support, 8110-3 approvals, and deep knowledge of aircraft systems, wiring, and complex avionics integrations.
Part 21G/J • DO-160G • D6-54446 Wire Harness Mfg (AS50881) STC Development
CANNAN AVIONICS
U1808 TECHNOLOGY • PROVEN ON PART 25
Provider of the U1808 FMC Interface Card — already STC approved on Part 25 aircraft. Their hardware enables third-party FMS integration into Collins Pro Line environments. Cannan is adapting the proven U1808 platform specifically for the King Air Part 23 environment in partnership with Archangel.
Visit canaanavionics.com →
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NEXT STEP

Ready to modernize your King Air fleet?

Contact us to discuss technical details, pricing, timeline, and next steps for your specific aircraft.

Jon Shoemake FAA DER
Archangel Services Corp.
Jon.shoemake@archangel.aero
136 Ostwalt Amity Road, STE A
Troutman, NC 28166

We'll respond within 1 business day. All inquiries confidential.