What is an airline training simulator, and how does it work?
Learn how an airline training simulator recreates an aircraft, what full-flight motion does, and how pilots use it for training and checks.
An airline training simulator is a regulator-qualified device that reproduces a specific aircraft's cockpit, systems, handling and operating environment. It works by feeding pilots' control inputs into a real-time aircraft model, then returning matching instrument indications, visuals, sound and, in a full-flight simulator, motion cues for instruction, checking and recurrent training.
For real-world airline training, the word “simulator” covers several devices. Formal training credit depends on the device's qualification, the aircraft and configuration it represents, and the regulator-approved training programme in which it is used.
What types of airline training simulator are used?
Airlines choose the device according to the task: learning a panel does not require the same equipment as practising an engine failure at take-off.
| Device | What it reproduces | Typical use |
|---|---|---|
| Full-flight simulator (FFS) | A complete flight deck, aircraft systems, control loading, outside visuals, sound and a motion platform | Type-rating manoeuvres, abnormal situations, line scenarios, proficiency checks and recurrent training |
| Flight training device (FTD) | A cockpit and systems representation without a full-flight motion requirement | Procedures, systems, instrument operations and, where its qualification permits, flight manoeuvres |
| Procedure or part-task trainer | A selected panel, flight management system, avionics suite or simplified cockpit | Switch flows, flight-management programming, familiarisation and systems practice |
Names and qualification levels vary between aviation authorities. Our explanation of how FTDs complement full-flight simulators covers the practical distinction in more detail.
How does an airline training simulator work?
An airline simulator is a closed-loop system: every pilot input changes the simulated aircraft, and the resulting aircraft state changes what the pilots see, hear and feel.
- The cockpit captures inputs. Sensors detect control-column, sidestick, pedal, thrust-lever and switch positions. A control-loading system supplies the forces expected from the represented aircraft where applicable.
- The flight model calculates the response. Computers continuously model aerodynamics, engines, mass, atmosphere, landing-gear contact and other forces. The simulation calculates what happens next rather than playing back a recorded flight.
- The systems models interact. Electrical, hydraulic, pneumatic, fuel, pressurisation, autoflight and avionics systems respond to switch selections, failures and one another. A failed generator, for example, should alter the electrical network and every dependent system rather than merely illuminate a warning.
- Visuals and sound are generated. The visual system displays the runway, terrain, lighting, weather and traffic environment from the calculated position. Engine noise, airflow, warning tones and mechanical sounds remain synchronised with the aircraft state.
- Motion cues are added. A full-flight simulator moves and tilts the cockpit to suggest acceleration, braking, turbulence, touchdown and changes in attitude.
- The instructor controls the exercise. From an instructor operating station, a trainer can change weather, introduce malfunctions, reposition or freeze the aircraft, monitor performance and review events after the session.
The same input-model-output principle also powers home simulation; our overview of aircraft physics, systems and visuals in flight simulators explains that common foundation. An airline device differs in its validated data, cockpit fidelity, maintenance controls and regulatory oversight.
Does the motion platform reproduce every force?
Simulator motion reproduces short-duration acceleration cues, not sustained g-forces. Most full-flight systems have limited physical travel, so a “washout” algorithm provides the initial sensation and then gradually returns the platform towards its neutral position without an obvious movement.
Motion is useful, but it is not the sole measure of realism. Low visual latency, accurate control forces, correct aircraft data and systems that fail realistically can matter more than dramatic platform movement.
What do airline pilots practise in a simulator?
Pilots use airline simulators for normal procedures, rare failures and crew exercises that would be unsafe, costly or impractical to reproduce in an aircraft.
- Flight-deck preparation, checklists, taxi, take-off, approach and landing
- Instrument departures, arrivals, holding and low-visibility approaches
- Rejected take-offs and engine failures at demanding stages of flight
- Electrical, hydraulic, pressurisation, flight-control and navigation failures
- Windshear, terrain and collision-avoidance warnings
- Smoke, fire, rapid decompression and emergency descent procedures
- Line-oriented flight training using realistic routes, weather and operational decisions
- Crew resource management, communication and workload sharing
The instructor can repeat the same event, vary its timing and restore the aircraft immediately. That repeatability is one of the simulator's main advantages over aircraft training.
How is an airline simulator judged accurate enough?
A qualified simulator must demonstrate that its behaviour matches approved aircraft data within specified tolerances. Objective qualification tests compare items such as handling response, engine performance and system behaviour, while experienced evaluators also assess cockpit operation and the overall flying response.
Qualification applies to a defined aircraft type, variant and equipment standard. Differences in engines, avionics, flight-control software or cockpit layout may require an approved update or differences training. A device advertised as a high-level simulator is not automatically suitable for every variant carrying the same aircraft family name.
The simulator also undergoes continuing tests and regulatory evaluations to retain its qualification. The operator's training course, instructors and checking process are approved separately; a qualified machine alone does not make every session valid for licence or type-rating credit.
Can simulator training replace flying the real aircraft?
An approved full-flight simulator can replace much of the aircraft training required for an airline type rating or recurrent check, but the exact credit depends on the regulator, pilot experience and approved course.
Some zero-flight-time programmes allow eligible pilots to move from simulator training and checking to supervised line flying without a separate block of aircraft base training. This does not eliminate real-aircraft experience: operating experience, line training and line checks still apply where required.
Desktop software and unqualified trainers can build familiarity, but they do not acquire formal credit merely because their graphics or cockpit look convincing. Our assessment of what simulator practice can and cannot teach explains why procedures transfer well while physical sensation, real risk and operational judgement still require instruction in aviation's real operating environment.
What mistakes cause poor simulator training?
The most common mistake is treating visual similarity as proof of training accuracy. Pilots should confirm the aircraft variant, engine type, avionics standard and approved use rather than relying on the simulator's appearance or motion.
- Using the wrong configuration: switch logic and procedures can differ between aircraft variants, creating negative training.
- Overvaluing motion: excessive or poorly coordinated motion is less useful than accurate handling, control loading and visuals.
- Practising without an approved procedure: repetition reinforces mistakes as efficiently as correct technique.
- Confusing device qualification with pilot qualification: training credit comes from completing the approved syllabus and assessment, not simply logging time in the machine.