Otto Aerospace Advances Phantom 3500 Toward FAA Certification

Updated on June 15, 2026 • 4 min read

Otto Aerospace has reached an important regulatory milestone in the development of its Phantom 3500 business aircraft after finalizing the Federal Aviation Administration (FAA) G-1 issue paper, establishing the aircraft’s type certification basis under 14 CFR Part 23.

The achievement moves the Phantom 3500 program into its next execution phase as the company targets first flight in 2027 and entry into service by 2030.

Establishing the Certification Path

The Fort Worth, Texas-based company became an FAA applicant for type certification in September 2025. Otto strategically chose to pursue certification under Part 23 Amendment 23-64, which introduced more performance-based certification requirements intended to improve efficiency and encourage innovation in aircraft development.

The closure of the G-1 issue paper formally defines the certification basis agreed upon between Otto and the FAA.

At the same time, Otto is continuing discussions with the FAA East Certification Branch to finalize the G-2 issue paper, which establishes the means of compliance that will be used throughout the certification program.

“Now that the certification basis is in place, the program moves into a higher gear on execution,” said Scott Drennan, president and CEO of Otto Aerospace. “We have alignment with the FAA on what we need to demonstrate, and that gives us real momentum as we move toward first flight and entry into service.”

Novel Technologies Enter the Certification Process

The Phantom 3500 program is notable because it incorporates technologies that have rarely progressed this far into the certification process.

Among them are:

• Otto’s transonic laminar flow technology;
• the company’s Supernatural Vision cabin concept;
• advanced lightweight structures;
• aerodynamic efficiency innovations designed to reduce fuel consumption.

According to Otto, extensive engineering activities and testing have already been completed, including the aircraft’s preliminary design review.

The company has also begun advanced material testing activities to support certification.

First Flight Planned for 2027

Otto reported continued progress with key suppliers as it advances the Phantom 3500 toward flight testing.

Current program milestones include:

• FAA type certification application: September 2025;
• G-1 issue paper finalized: 2026;
• G-2 issue paper under development;
• First flight target: 2027;
• Entry into service target: 2030.

Flight testing will be conducted from Otto’s new operational base at Cecil Airport in Jacksonville, Florida.

Why the G-1 Milestone Matters

For most aircraft programs, G-1 closure may appear to be an administrative step.

However, it represents one of the most important regulatory milestones in certification.

The G-1 issue paper effectively answers a critical question:

What exactly does the FAA require the manufacturer to prove before the aircraft can enter service?

Without this agreement, testing, compliance activities and supplier qualification efforts cannot proceed efficiently.

For innovative aircraft designs introducing new technologies, regulatory alignment is often one of the largest program risks.

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Editorial Perspective

The Phantom 3500 remains one of the more unconventional aircraft programs currently under development.

Its emphasis on laminar-flow aerodynamics, fuel efficiency and novel cabin concepts aims to challenge traditional business jet design philosophies.

The completion of the G-1 issue paper suggests that the FAA is now sufficiently aligned with Otto Aerospace on the certification framework needed to evaluate these innovations.

The next major milestones will be the closure of the G-2 issue paper, completion of compliance testing and the aircraft’s planned first flight in 2027.

If Otto successfully navigates certification, the Phantom 3500 could demonstrate how performance-based regulations under Part 23 enable the introduction of advanced aerodynamic and composite technologies into future business aviation platforms.