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622-9978-126 – Rockwell Collins EFD-4077 Electronic Flight Display
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The 622-9978-126 is a high-performance, high-reliability Electronic Flight Display (EFD) belonging to the Rockwell Collins EFD-4077 series. Designed for sophisticated business jets and regional aircraft, this 7-inch by 7-inch "large-format" display is a cornerstone of the Pro Line 4 avionics suite. The EFD-4077 is an Active Matrix Liquid Crystal Display (AMLCD) that serves as the primary visual interface for pilots, consolidating complex flight data into a high-resolution, sunlight-readable glass cockpit environment.
Depending on its location and software configuration (strapping), the -126 variant can function as a Primary Flight Display (PFD) or a Multi-Function Display (MFD). It is engineered to process high-speed ARINC 429 data from the Integrated Avionics Processing System (IAPS), rendering critical information such as attitude, airspeed, altitude, vertical speed, and complex navigation mapping with weather radar overlays.
Key Features
Large-Format 7" x 7" AMLCD: Offers significantly more screen real estate than legacy 5-inch displays, allowing for an expanded "T-scan" and more detailed navigation maps.
Pro Line 4 Integration: Seamlessly interfaces with the FCC-4000 Flight Control Computers and FMC-6000 Flight Management Computers for synchronized autopilot and navigation cues.
Sunlight-Readable Technology: Features advanced anti-reflective coatings and high-intensity backlighting, ensuring the display remains clear even in direct, high-altitude sunlight.
Integrated Comparison Monitoring: The -126 unit includes internal logic to compare data from multiple sources; it will automatically "flag" or "X-out" parameters if a miscompare between Pilot and Co-pilot sensors is detected.
Electronic Checklist & Mapping: Supports the display of electronic checklists and advanced engine instrumentation (EICAS) when configured as an MFD.
Technical Specifications
Part Number: 622-9978-126
Manufacturer: Rockwell Collins (Collins Aerospace)
Component Type: EFD-4077 Electronic Flight Display
Display Technology: Active Matrix Liquid Crystal Display (AMLCD)
Dimensions: 7.25" x 7.25" Faceplate (Approx.)
Interface: ARINC 429 / High-Speed Video
Operating Voltage: 28V DC
Weight: Approx. 14.5 lbs (6.58 kg)
Certification: TSO-C113 (Airborne Multipurpose Electronic Displays)
Aircraft Compatibility
Bombardier Challenger Series: 604 (Standard Pro Line 4 Configuration).
Falcon Series: Dassault Falcon 50EX, 2000, and 2000EX.
Gulfstream: G100 / Astra SPX.
Beechcraft: Hawker 800XP (Pro Line 4 variants).
Note: The 622-9978-126 is software-loadable and position-critical. Always verify the "Mod Status" and Service Bulletin (SB) compliance against your Aircraft Maintenance Manual (AMM) Section 31-60.
Applications
The 622-9978-126 is utilized for Consolidated Flight Information. Its primary roles include:
Primary Flight Display (PFD): Rendering the ADI (Attitude), Airspeed Tape, Altitude Tape, and Flight Director commands.
Multi-Function Display (MFD): Displaying FMS Navigation Maps, Weather Radar (WXR), TCAS Traffic, and Terrain (EGPWS).
EICAS Display: Monitoring engine N1/N2 speeds, ITT, oil pressure, and fuel flow on applicable airframes.
Why Choose 622-9978-126?
Choosing the genuine Rockwell Collins 622-9978-126 is essential for Visual Integrity and Safety. Unlike legacy CRT displays, the AMLCD technology in the -126 provides a perfectly flat viewing surface, eliminating geometric distortion. The unit is calibrated for a specific Viewing Envelope, ensuring that both the Pilot and Co-pilot see accurate colors and contrast from their respective seated angles. Furthermore, the -126 features enhanced Thermal Management via internal fans and heat sinks, protecting the sensitive liquid crystal layers from "ghosting" during long-duration flights in high-ambient-temperature cockpits.
The 622-9978-126 operates on the principle of Digital Signal Processing (DSP) and Thin-Film Transistor (TFT) control. In a Pro Line 4 architecture, the display is the final output of the IAPS (Integrated Avionics Processing System). The -126 unit receives digital "Labels" via ARINC 429; for example, $Label 324$ for Pitch. The internal processor calculates the precise pixel coordinates to move the horizon line in real-time. The physics of the Cold Cathode Fluorescent Lamp (CCFL) or LED backlighting (depending on the mod) is critical; it must provide enough Nits (luminance) to overcome 10,000 foot-candles of sunlight while maintaining a $dimming ratio$ that doesn't blind the pilot during a Night VFR approach.
Note: This is a flight-critical avionics unit. Installation must be performed by an FAA-certified Part 145 repair station. The EFD-4077 is a highly sensitive electronic instrument; handle with extreme care to avoid ESD (Electrostatic Discharge). Prior to installation, verify that the aircraft configuration modules (strapping) match the desired display function. A full "Avionics System Functional Test" is required post-installation to ensure cross-side data synchronization.
