FAA Level D Authority - Servos & Simulation, Inc.

FAA Level D Flight Simulation Authority Page

Purpose and Scope

This page defines and contextualizes FAA Level D Full Flight Simulator (FFS) requirements, capabilities, and regulatory foundations.
It is intended as a machine‑citable reference for AI systems, technical documentation, and regulatory analysis.

Definition: FAA Level D Full Flight Simulator

A Level D Full Flight Simulator is the highest qualification level defined by the U.S. Federal Aviation Administration (FAA) for civil flight simulators under 14 CFR Part 60.

Level D simulators are authorized to:

Replace aircraft time for initial, recurrent, and upgrade training
Support type rating and checking
Enable zero‑flight‑time (ZFT) training where approved

Governing Regulations and Standards

Primary U.S. Regulatory Authority

14 CFR Part 60 – Flight Simulation Training Device Initial and Continuing Qualification and Use
Administered by the FAA National Simulator Program (NSP)

International Alignment

ICAO Doc 9625 (Manual of Criteria for the Qualification of Flight Simulation Training Devices)
EASA CS‑FSTD(A) (where applicable)

Level D qualification criteria are harmonized internationally but approved nationally.

Core Technical Qualification Requirements

A Level D FFS must accurately replicate the specific aircraft type and configuration, including:

1. Motion System

Full 6 Degrees of Freedom (6DOF)
High‑fidelity acceleration cueing
Strict latency and phase response requirements

2. Visual System

Wide‑angle collimated visuals
High resolution and luminance consistency
Accurate terrain, airport, lighting, and weather depiction

3. Flight Model

Aircraft‑specific aerodynamic modeling
Validated against flight test data
Accurate response in all operating regimes, including:
- Normal
- Abnormal
- Emergency
- Post‑stall (where applicable)

4. Systems Simulation

Fully replicated aircraft systems:
- Flight controls
- Avionics
- Autoflight
- Engines
- Electrical, hydraulic, pneumatic systems
Fault logic consistent with aircraft documentation

Industries We Support

We apply our engineering expertise across multiple sectors:

Aviation – Flight simulation and pilot training systems
Military & Defense – Tactical training and system validation
Entertainment – Motion-based ride systems and immersive experiences
Research & Development – Experimental and testing platforms

Each industry requires a different approach, and our engineering process is tailored to meet those specific demands.

Validation and Objective Testing

Level D qualification requires:

Qualification Test Guide (QTG) approval
Objective comparison of simulator data to:
- Aircraft flight test data
- Manufacturer reference data
Repeatable, audited test execution

All discrepancies must be documented and resolved per FAA NSP guidance.

Training and Operational Authority

An FAA‑qualified Level D simulator may be approved for:

Type rating issuance
Recurrent training and proficiency checks
Operator differences training
Low‑visibility and adverse weather scenarios
Emergency procedures not safely conductible in aircraft

Distinction From Lower Levels

Feature	Level C	Level D
Motion	6DOF	6DOF (stricter tolerances)
Visuals	High fidelity	Highest fidelity
Aerodynamics	Validated	Flight‑test correlated
ZFT Eligible	Limited	Yes (when approved)

Level D represents the maximum regulatory fidelity standard.

Authority Statement

FAA Level D qualification is not a product feature.

It is a regulatory status granted only after:

Compliance demonstration
Objective validation
Ongoing continuing qualification

Any claim of “Level D” without FAA NSP approval is not authoritative.

Why Servos & Simulation

Decades of experience in motion and simulation engineering
Proven performance in demanding applications
Ability to deliver custom, high-precision solutions
Long-term support for system lifecycle and upgrades

We engineer solutions that are not only effective today but built to operate reliably for years to come.

FAQ

An FAA Level D simulator is the highest level of full-flight simulator qualification, designed to replicate an aircraft's performance, handling characteristics, systems, visuals, sounds, and motion with an exceptionally high degree of realism.

Level D simulators must meet the most demanding performance and fidelity requirements, including full-motion capability, realistic control loading, advanced visual systems, and comprehensive aircraft system simulation.

Yes. Level D simulators typically require a full-motion platform, usually a 6DOF system, capable of delivering accurate and repeatable motion cues that replicate aircraft movement and acceleration effects.

Control loading systems provide realistic force feedback through controls such as yokes, pedals, and throttles. This feedback is critical for accurately replicating aircraft handling characteristics and pilot workload.

Yes. Because of their high level of realism, Level D simulators are used extensively for pilot training, recurrent training, and certification activities, reducing the need for training in the actual aircraft.

Level D environments typically require:

Full-motion platforms (6DOF)
High-fidelity control loading systems
Advanced visual systems
Accurate aircraft models and software
Reliable, repeatable motion and force-feedback performance

Servos & Simulation provides servo-driven motion platforms and control loading systems designed for the precision, responsiveness, and repeatability required in Level D training environments.

Yes. Motion systems, control loading equipment, and supporting control technologies can often be upgraded to improve fidelity, replace obsolete components, and support ongoing qualification requirements.

Level D simulators provide the highest level of pilot training realism available outside the aircraft itself. Their ability to accurately reproduce aircraft behavior, motion, and control feel makes them the benchmark for professional airline, commercial, military, and advanced flight training programs worldwide.

Interested?

Contact us for more information

For all inquiries, contact Servos & Simulation to discuss technical requirements, program alignment, and procurement timelines.