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622-9978-114 – Rockwell Collins EFIS-85/86 Electronic Flight Display (EFD)
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The 622-9978-114 is a high-performance, TSO-certified Electronic Flight Display (EFD) belonging to the legendary Rockwell Collins EFIS-85/86 family. This unit serves as a primary pilot interface, typically configured as either a Primary Flight Display (PFD) or a Multi-Function Display (MFD). Engineered for turbine-class aircraft, the -114 variant is a high-reliability Cathode Ray Tube (CRT) or early-generation active-matrix unit (depending on the specific mod strike) designed to consolidate complex flight data into a single, intuitive visual scan.
As the centerpiece of the cockpit's glass transition, this display processes and renders critical flight parameters—including attitude (ADI), horizontal situation (HSI), airspeed, altitude, and navigation mapping—delivered via high-speed ARINC 429 data buses. Its ruggedized construction is designed to withstand the thermal and vibrational rigors of continuous corporate and regional airline operations.
Key Features
Integrated Flight Mapping: Capable of displaying weather radar overlays (WXR), TCAS traffic alerts, and complex flight plan waypoints directly on the HSI/Map page.
High-Contrast Rendering: Optimized for sunlight readability and night-flight dimming, ensuring that "Critical-to-Flight" symbology remains clear under all ambient lighting conditions.
Dual-Processor Redundancy: Features internal monitoring that cross-checks data integrity; if a mismatch is detected, the unit displays "Flag" warnings to prevent the pilot from acting on erroneous data.
Flexible "Reversionary" Mode: Allows the display to swap roles (e.g., an MFD can become a PFD) in the event of a co-located display failure, maintaining mission dispatchability.
Dzus Rail Mounting: Designed for standard 5x5 or 5x6 inch cockpit cutouts, featuring a quick-release locking mechanism for rapid "line-replaceable unit" (LRU) exchange.
Technical Specifications
Part Number: 622-9978-114
Manufacturer: Rockwell Collins (Collins Aerospace)
Component Type: EFIS Electronic Flight Display (EFD)
Display Size: Approx. 5" x 5" or 5" x 6" (Standard EFIS-85/86 Form Factor)
Interface: ARINC 429 / Analog Composite Video
Operating Voltage: 28V DC / 115V AC (Dependent on airframe harness)
Certification: TSO-C113 (Airborne Multipurpose Electronic Displays)
Weight: Approx. 8.5 lbs (3.8 kg)
Aircraft Compatibility
Beechcraft King Air Series: 200, 300, 350 (Standard fit for Pro Line 2/21 transitions).
Cessna Citation Series: Citation II, V, and Ultra.
Hawker/Beechcraft: Hawker 800/800XP.
Regional Turboprops: Saab 340, Embraer EMB-120 Brasilia.
Note: The -114 variant is often software-pinned to the specific airframe. Verify the "dash number" and Mod Status against your Aircraft Maintenance Manual (AMM) Section 31-60.
Applications
The 622-9978-114 is utilized for Primary Flight Instrumentation. Its primary roles include:
Attitude Direction Indicator (ADI): Rendering the artificial horizon, flight director bars, and glideslope/localizer deviations.
Horizontal Situation Indicator (HSI): Providing heading, VOR/ADF bearing pointers, and distance-to-waypoint data.
Weather/Traffic Visualization: Overlaying NEXRAD or onboard radar data to assist in storm avoidance.
Why Choose 622-9978-114?
Choosing the genuine Rockwell Collins 622-9978-114 ensures Symbology Consistency. In EFIS systems, timing is everything; non-OEM or improperly overhauled units can suffer from "video lag" or "tearing," where the artificial horizon does not move in real-time with the aircraft's motion. The -114 variant is calibrated for a specific Refresh Rate, ensuring that the pilot’s vestibular senses (the inner ear) match the visual cues on the screen, a critical factor in preventing spatial disorientation during IFR flight.
The 622-9978-114 operates on the principle of Raster and Stroke Scanning. While modern LCDs use pixels, many versions of the 622-9978 series utilize a high-speed electron beam to "paint" the ADI horizon (Raster) while simultaneously drawing the sharp, high-contrast text and needles (Stroke). This dual-rendering approach provides the superior clarity required for IFR Minimums. The unit communicates via ARINC 429 labels, where specific digital "words" are translated into visual displacements (e.g., Label 324 for Pitch, Label 325 for Roll). This ensures that the display is essentially a "dumb terminal" for the DPU (Display Processing Unit), providing a robust, crash-protected portal to the aircraft's navigation heart.
Note: This is a flight-critical avionics unit. Installation must be performed by an FAA-certified Part 145 repair station. Prior to installation, verify the software "strapping" on the aircraft connector to ensure the display initializes as the correct station (Pilot vs. Co-pilot). A full "Pitot-Static" leak check and "Heading Swing" are recommended post-installation to ensure system-wide accuracy.
