Administrative Law

AC 20-138D: Airworthiness Approval for GNSS Installations

Discover the guidelines for airworthiness approval of GNSS installations in aircraft, ensuring compliance with aviation regulations

Introduction to Airworthiness Approval

The Federal Aviation Administration (FAA) requires airworthiness approval for all aircraft systems, including GNSS installations. This approval ensures that the system meets the necessary safety and performance standards.

The airworthiness approval process involves a thorough evaluation of the GNSS installation, including its design, testing, and documentation. This process helps to prevent accidents and ensures that aircraft are safe for flight.

GNSS Installation Requirements

To obtain airworthiness approval, GNSS installations must meet specific requirements, including compliance with relevant technical standard orders (TSOs) and industry standards. The installation must also be compatible with the aircraft's existing systems.

The FAA provides guidelines for GNSS installation, including requirements for antenna placement, wiring, and system integration. These guidelines help to ensure that the installation is safe and functional.

Approval Process for GNSS Installations

The approval process for GNSS installations involves submitting a detailed application to the FAA, including documentation of the system's design, testing, and performance. The application must also include information about the aircraft and its existing systems.

The FAA reviews the application and conducts an inspection of the aircraft to verify compliance with regulations and standards. If the installation meets the requirements, the FAA issues an airworthiness approval certificate.

Compliance with Aviation Regulations

GNSS installations must comply with relevant aviation regulations, including those related to system performance, safety, and security. The installation must also meet the requirements of the aircraft's type certificate and any applicable supplemental type certificates.

The FAA enforces compliance with these regulations through regular inspections and audits. Failure to comply with regulations can result in penalties, fines, and even loss of airworthiness certification.

Maintaining Airworthiness Approval

To maintain airworthiness approval, aircraft owners and operators must ensure that the GNSS installation remains compliant with regulations and standards. This includes performing regular maintenance and updates, as well as reporting any changes or modifications to the FAA.

The FAA also requires periodic inspections and audits to verify continued compliance with regulations. These inspections help to identify any potential issues or deficiencies, ensuring that the aircraft remains safe for flight.

Frequently Asked Questions

What is the purpose of airworthiness approval for GNSS installations?

The purpose of airworthiness approval is to ensure that the GNSS installation meets safety and performance standards, preventing accidents and ensuring flight safety.

What are the requirements for GNSS installation approval?

The requirements include compliance with TSOs and industry standards, compatibility with existing systems, and documentation of design, testing, and performance.

How do I obtain airworthiness approval for a GNSS installation?

Submit a detailed application to the FAA, including documentation and information about the aircraft and its systems, and undergo an inspection to verify compliance.

What happens if my GNSS installation does not meet regulatory requirements?

If the installation does not meet requirements, the FAA may deny airworthiness approval, and you may be required to modify or replace the system to achieve compliance.

How often do I need to inspect and maintain my GNSS installation?

Regular maintenance and updates are necessary to ensure continued compliance with regulations and standards, with periodic inspections and audits required by the FAA.

Can I modify my GNSS installation after obtaining airworthiness approval?

Yes, but you must report any changes or modifications to the FAA and ensure that the modified system still meets regulatory requirements and standards.