GH-3900 Electronic Standby Instrument System

Why choose the GH-3900 ESIS?

For business aviation operators, safety redundancy is not optional - it is essential. Acron Aviation’s GH-3900 Electronic Standby Instrument System delivers a highly reliable backup solution that protects pilots and passengers when primary displays fail.

Designed with independent power capability and robust architecture, the GH-3900 ensures continuous access to critical flight data in high-stress scenarios. Its proven reliability reduces operational risk while supporting compliance with stringent aviation safety requirements.

Equally important in business aircraft is space efficiency. The GH-3900’s compact, integrated design replaces multiple legacy standby gauges, freeing valuable panel space and reducing weight. The result is a cleaner cockpit, improved situational awareness, and dependable backup performance - making it a smart investment for modern business aviation fleets.

Backed by 60+ years of proven reliability, Acron Aviation’s GH-3900 ESIS reflects a track record trusted across global fleets. Acron Aviation combines next-generation innovation with legacy compatibility - delivering modern performance grounded in decades of operational credibility and expertise in avionics products.

What this means for you

• Regulatory compliance and future-proofing – Meets evolving certification requirements while supporting next-generation avionics upgrades, protecting long-term aircraft value.
• Cost savings vs. legacy systems – Replaces multiple mechanical gauges with a single integrated unit, reducing maintenance, parts inventory, and lifecycle costs.
• Easy integration without rewiring – Designed for streamlined installation, minimizing aircraft modification complexity.
• Operational efficiency and minimal downtime – Fast installation and high reliability keep aircraft flying.
• Risk mitigation and enhanced safety – Independent backup capability ensures continuous access to critical flight data.

Regulatory compliance

GH-3900 carries multiple FAA Technical Standard Order (TSO) approvals (e.g., TSO-C2d, C3e, C4c, C6e, C8e, C10b, C34e, C35d, C36e, C40c, C46a, C66c, C95a, C106, C113, C115b) and corresponding ETSO markings accepted under FAA-EASA TIP guidance - offering clear certification pedigree and global regulatory compliance for business and transport category installations.

Fleet compatibility

GH-3900 is compatible with a broad range of Part 23, 25, 27, and 29 fixed-wing and rotorcraft platforms - mid- to large-cabin business jets, turboprops, helicopters, and transport category aircraft - thanks to its ARINC-based interfaces and configurable I/O.

Installations often use Supplemental Type Certificates (STCs), such as for the Dassault Falcon 2000/2000EX series, and many more aircraft models can be supported via additional STCs or approved installation data tailored to specific airframes. 

GH-3900 ESIS solutions

Available in multiple configurations, supporting varied display formats, power options, and interface requirements to match diverse aircraft platforms and operational mission profiles.

GH-3900 (Internal ADC)

Aimed at business aviation operators, regional carriers, and helicopter fleets that want a modern, integrated standby system with a built‑in air data computer - ideal for aircraft migrating away from legacy mechanical instruments but lacking standalone ADC sources. It appeals to operators who value redundancy, straightforward wiring, and reliable flight‑critical data in a compact form. 

The GH‑3900 (Internal ADC) variant combines full standby attitude and flight information with an integrated Air Data Computer (ADC). This simplifies installation, reduces dependence on external ADC units, and supports air data sharing with other avionics when permitted by certification. With configurable ARINC interfaces and Level A design, this variant keeps reliability and flexibility at the forefront.

Key features

• Integrated Air Data Computer (ADC) for self‑contained air data processing.
• Full electronic standby ADI with attitude, airspeed, altitude, and heading.
• Configurable ARINC‑429, RS‑422, RS‑232, discrete and analog interfaces.
• Compact, lightweight design for tight cockpit installations.
• Customizable display options and pilot flight cues.
• Shares air data with other compatible avionics, where approved.

Common in mid‑ to large‑cabin business jets, turboprops, and some helicopters, where an internal ADC reduces external boxes and simplifies wiring - particularly valuable in legacy aircraft being modernized or where external ADC sources are limited.

GH-3900RSU (Remote Sensor Unit)

A flexible electronic standby system designed for business, regional, commercial fixed‑wing aircraft and Part 27/29 rotorcraft that need versatile installation options and uncompromised backup flight data. By separating the cockpit display from the sensor unit, it delivers critical attitude, airspeed, altitude and navigation data while maximizing panel and installation flexibility for modern avionics architectures.

The GH‑3900RSU offers a two‑piece architecture: a compact wide‑screen 4.2‑inch cockpit display and a remote sensor unit housing rate/level sensors, air data transducers and optional accelerometers. This configuration allows installers to mount the low‑profile display virtually anywhere on the instrument panel while the RSU can be placed in optimized locations to collect reliable flight data. Heading information is supported via ARINC 429 or an optional magnetometer.

Key features

• Two‑piece system with remote sensor unit flexibility.
• 4.2‑inch landscape display with configurable parameters.
• Remote sensor unit with air data transducers and rate/level sensors.
• Support for ARINC 429, RS‑422/RS‑232, discrete and analog interfaces.
• Installer‑definable Static Source Error Correction (SSEC) & VMO values.
• Optional accelerometers and flexible heading input.

Ideal in aircraft with limited panel depth or where space and sensor placement options vary - including business jets, regional airliners and utility helicopters requiring reliable standby information and flexible installation. 

Key capabilities

1. Exceptional display clarity and pilot awareness

The GH‑3900 provides high‑resolution, easy-to-read displays that ensure critical flight information is visible in all lighting conditions, including bright sunlight and low-light cockpit environments.

Configurable visual cues and declutter modes allow pilots to prioritize essential data, improving situational awareness and reducing cognitive load. This clarity directly supports safer decision-making during high-stress situations or instrument failures, making it the most critical capability for operational reliability.

2. Seamless avionics integration

Designed for modern cockpits, the GH‑3900 supports ARINC, RS‑232/RS‑422, discrete, and analog interfaces, allowing smooth integration with primary avionics, autopilot, and navigation systems. Its flexible input/output architecture minimizes modifications, reduces wiring complexity, and ensures compatibility across Part 23, 25, 27, and 29 aircraft.

3. Redundancy and operational reliability

Built with independent power and robust hardware/software architecture, the GH‑3900 delivers dependable backup capabilities. It maintains continuous access to critical flight data, supporting compliance with regulatory requirements and providing pilots a trusted fail-safe in the event of primary system failure.

4. Compact, space-saving design

The unit’s low-profile form factor and lightweight construction make it ideal for cockpits with limited space. By replacing multiple legacy mechanical instruments with a single integrated system, it frees panel space, reduces weight, and simplifies retrofits, enhancing efficiency and operational flexibility.

5. Future-proof and configurable architecture

With software-defined display options and configurable parameters, the GH‑3900 can adapt to evolving avionics standards and operator preferences. Its modular architecture ensures easy updates, preserving aircraft value and extending the system’s operational lifespan.

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