CNFSimulator® · Model 03 · COMAC C919
C919 VMT
COMAC C919 Virtual Maintenance Trainer — the first desktop maintenance simulator purpose-built for C919 type-rating training.
COMAC C919 Virtual Maintenance Trainer — the first desktop maintenance simulator purpose-built for C919 type-rating training.
The COMAC C919 is China's first independently developed and CAAC-certified narrowbody airliner. As airlines across China begin receiving C919 deliveries, the demand for qualified C919 maintenance engineers is growing rapidly — yet physical aircraft access for training purposes remains extremely limited. The CNFSimulator® C919 VMT addresses this gap directly.
The C919 VMT is the only desktop maintenance simulator in the CNFSimulator® range designed around a Chinese-manufactured aircraft type. It covers the COMAC C919 with CFM LEAP-1C engine — the standard powerplant for all current C919 deliveries — and provides a complete maintenance training environment covering 20+ ATA chapters across all four task categories.
Compared to the A320 and B737 products in the CNFSimulator® range, the C919 VMT has the broadest task library with 200+ training tasks, and is the only product that includes ATA 53 fuselage structure tasks — reflecting the specific maintenance training requirements of CAAC-certified operators.
View software modulesThe C919 VMT is the first and currently the only desktop maintenance training system purpose-built for C919 type-rating training. It is designed to meet CAAC, FAA Part 147, and EASA Part 147 training requirements, and is particularly suited to Chinese aviation training institutions preparing engineers for C919 operator entry.
The C919 VMT is designed around the production-standard C919 configuration. All system logic, cockpit layout, and maintenance procedures are aligned to the C919 as certified by CAAC and delivered to Chinese airline operators.
China's first independently developed narrowbody airliner. CAAC-certified, seating 158–192 passengers. Competes directly with the Airbus A320 and Boeing 737 families in the single-aisle market.
High-bypass turbofan, standard powerplant for all current C919 deliveries. The VMT simulates full FADEC operation, N1/N2/EGT/fuel flow/oil pressure/vibration parameters, and the complete ATA 70 trial run task library.
All C919 system behaviours are modelled in Unity3D. The platform supports real-time synchronisation across all five software modules with a 50ms maximum state propagation latency.
One instructor station connected to up to 12 student stations over a local network. Supports 1,000+ concurrent sessions for multi-site or remote deployment. Continuous runtime guaranteed at 24+ hours.
The C919 VMT consists of five tightly coupled software modules that run simultaneously and share a common real-time simulation state. Any action in the cockpit propagates immediately to the schematics, 3D aircraft model, and work card tracker. All five modules are included as standard — there are no optional add-ons.
The instructor interface is the control centre for the entire training session. From a single screen, the instructor manages task assignment, fault injection, aircraft state configuration, and student monitoring across all connected student stations simultaneously.
Fault injection is immediate — the student's cockpit responds with the correct ECAS warnings, system page changes, and CFDS fault codes as soon as the fault is activated. Faults can be injected at the ATA chapter level with four fault categories per chapter.
The student interface is the entry point for all training activity. It receives task assignments and fault configurations from the instructor station, provides access to bilingual work cards, and launches all simulation modules for the active task.
Work cards are displayed in bilingual format (Chinese and English) with step-by-step guidance for each maintenance procedure. For advanced training, students can work directly from the integrated AMM without work card assistance.
The dynamic schematic viewer covers all 20+ ATA system chapters with three complementary diagram layers that update continuously in real time. Students see the direct relationship between cockpit actions and system behaviour — replicating the diagnostic process used by working C919 maintenance engineers.
All three layers are continuously synchronised with the virtual cockpit state, with a maximum propagation latency of 50ms. Changes in the cockpit are reflected immediately on the schematic, and the synchronisation is bi-directional.
The virtual cockpit is a complete 3D simulation of the COMAC C919 flight deck. All cockpit panels P1 through P9 are modelled and fully mouse-operable. Every switch, knob, selector, and display responds with the correct system logic — including ECAS warnings, CFDS fault code generation, and EFIS state changes.
The cockpit is the central state engine of the simulation — any change here propagates immediately to the dynamic schematics, 3D aircraft model, and work card tracker. It supports both maintenance mode and full flight simulation mode for engine trial run training.
The 3D virtual aircraft module provides a complete exterior and interior model of the C919 for maintenance task execution. Students can access all external panels, nacelles, landing gear bays, avionics bay, and cargo doors — and perform component-level removal, inspection, installation, and testing tasks following C919 AMM procedures.
The integrated manual system includes the complete C919 documentation set, searchable by keyword or task number. All major manual types are included as standard, and the system also supports addition of custom PDF documents.
The C919 VMT covers 20+ ATA system chapters. Each chapter supports four task categories, allowing students to progress from system familiarisation through to independent fault isolation. The C919 VMT is the only product in the CNFSimulator® range that includes ATA 53 fuselage structure tasks.
A complete fault isolation session from fault injection to clearance — showing how all five modules work together in the C919 VMT training workflow.
The instructor selects an ATA chapter and fault type from the instructor interface and injects it into the student's station. The student's cockpit immediately displays the corresponding ECAS warning message and system page change — for example, an ATA 29 hydraulic fault triggers the relevant ECAS hydraulic page indications.
The student opens the Dynamic Schematic Viewer for the affected ATA chapter. The Logic Diagram shows the current system state with fault-affected components highlighted in amber or red. The student identifies the probable fault location and affected circuit before proceeding to the cockpit for BITE testing.
The student accesses the MCDU Maintenance page in the virtual cockpit to retrieve the stored CFDS fault code. The code provides the ATA chapter reference and fault description. The student then initiates the relevant BITE test sequence to confirm the fault and narrow down the affected component.
The student consults the integrated TSM or FIM to confirm the correct fault isolation sequence. The wiring diagram layer of the Dynamic Schematic Viewer is used alongside the manual to trace the circuit and confirm component identity. The virtual multimeter can be used to verify circuit continuity at specific test points.
The student switches to the 3D virtual aircraft module, locates the faulty LRU using the structure diagram reference, and accesses the relevant bay or panel. The removal and installation task is performed following the C919 AMM procedure, with tools and parts selected from the virtual stores.
After the component replacement, the student returns to the cockpit to perform the post-maintenance operational test. When the test passes and the ECAS message clears, the task is complete. The instructor reviews the session log and conducts a debrief based on the student's recorded step sequence and any procedural deviations.
The C919 VMT is designed for institutions and operators that need to train C919 maintenance engineers ahead of — or alongside — aircraft entry into service.
Chinese aviation engineering programmes are expanding their C919 training capacity ahead of growing airline demand. The C919 VMT provides full type-specific practical training without requiring access to a physical aircraft — which remains extremely limited at this stage of the C919's service entry.
Training organisations building C919 type-rating maintenance courses face a significant challenge: physical aircraft access for practical training is not yet widely available. The C919 VMT provides the practical simulation component needed to run complete type-rating programmes without aircraft dependency.
Airlines taking C919 deliveries need to build maintenance engineering capability quickly. The C919 VMT enables ground school training for new-hire engineers before they access a live aircraft — reducing the risk of errors on an aircraft type where experienced maintainers are still scarce across the industry.
Contact our team for a live demonstration, technical consultation, or pricing information. On-site installation and initial instructor training are available as part of the deployment package.