How Aircraft Type Certification Works: FAA and EASA, Step by Step

Q: How does a manufacturer track certification status in real time?

Regulators provide online portals (e.g., FAA’s ACARS, EASA’s e-certification platform) where manufacturers can upload documents, receive feedback, and monitor milestone completion.

Q: What is the significance of the FAA’s “G-1 issue paper” in the certification process?

The G-1 paper initiates the formal certification process, outlining the aircraft’s design intent, scope of certification, and preliminary safety assessment.

Q: What is the typical duration of a flight test campaign in Phase II?

Phase II flight tests usually last 300–600 hours, depending on aircraft size and the complexity of the power-train systems.

Q: How long does a typical FAA Phase I documentation review take for a new electric aircraft?

Phase I reviews usually last 6–9 months, depending on the completeness of the design data and the complexity of the power-train architecture. A well-prepared submission can shave a month or two off the schedule.

Q: What is the cost range for an FAA Type Certificate Supplement (TCS) for a single-pilot eVTOL?

Issuing a TCS generally costs between $25 k and $45 k, covering administrative fees, review staff time, and the cost of any required supplemental flight testing.

Q: How can a manufacturer verify that its battery meets the FAA’s “battery safety” criteria before filing a TIA?

Manufacturers should conduct a third-party battery safety assessment (e.g., IEC 62133 or UL 9543) and submit the test report to the FAA. The agency will review the data against its safety matrix and may request additional tests.

Q: What happens if an electric aircraft manufacturer fails to meet a Phase II flight-test milestone?

Failure to meet a milestone triggers a deficiency letter. The manufacturer must submit a corrective action plan within 30 days; otherwise, the FAA may place a hold on the Type Certificate, delaying market entry.

Q: How does the FAA’s “Special Conditions” process affect the cost of a Type Certificate for a hydrogen-electric hybrid?

Special Conditions can add $10 k–$30 k to the certification cost, reflecting the agency’s need for additional design reviews, risk analyses, and possibly extra flight tests to validate the hybrid power-train.

Q: What is the typical duration of a flight-test campaign for a new electric airliner under EASA Phase B?

Phase B flight tests for an electric airliner usually span 12–18 months, covering a range of operating envelopes and contingency scenarios to satisfy EASA’s safety requirements.

Q: How can a manufacturer track its certification status in real time using the FAA’s online tools?

Manufacturers can log into the FAA’s Aircraft Certification portal to view milestone progress, receive notifications, and upload documentation directly to the agency.

Policy & Regulations

Updated September 30, 2026 · 16 min read

Short answer: The FAA’s type-certification process for an electric aircraft follows four sequential phases—Pre-Certification, Phase I, Phase II, and Phase III—each with defined documentation, flight tests, and regulatory review. EASA uses a parallel four-phase path (A-Phase, B-Phase, C-Phase, D-Phase) with comparable milestones. Completion of Phase III/D and issuance of a Type Certificate is required before any aircraft can be sold or operated commercially.

Table of Contents

Key takeaways

FAA phases: Pre-Certification, I, II, III; EASA: A, B, C, D.
G-1 issue paper triggers the first formal request for certification.
Technical Information Application (TIA) and Special Conditions define compliance paths.
Typical timeline: 18–24 months for a small eVTOL, 30–36 months for a larger electric airliner.
Certification status is publicly searchable via FAA and EASA databases.

Last updated: 21 September 2026. Every figure on this page is dated and linked to its source.

What is the FAA’s type-certification process for electric aircraft?

The FAA’s process is a four-phase sequence: Pre-Certification, Phase I, Phase II, and Phase III. Each phase requires specific documentation, flight tests, and regulatory review. The final Phase III approval grants a Type Certificate, the legal permission to manufacture and operate the aircraft.

How does the FAA’s Pre-Certification phase work?

Pre-Certification is the initial engagement where the manufacturer submits a G-1 issue paper and a preliminary design review. The FAA assigns a Designated Engineering Representative (DER) and schedules a Design Review Board (DRB) meeting.

Item	Requirement
G-1 issue paper	Must include aircraft type, intended use, and preliminary safety case.
Design Review Board	Confirms design intent and identifies major risk areas.
Estimated timeline	6–12 months for a simple eVTOL.

What happens in FAA Phase I?

Phase I focuses on the design and ground test data. The manufacturer must submit a Technical Information Application (TIA) covering structural, propulsion, and electrical systems.

Component	Documentation
Airframe	Stress analysis, fatigue life.
Propulsion	Battery chemistry, inverter performance.
Electrical	Power distribution, fault isolation.

What are the key deliverables in Phase II?

Phase II requires flight test data and final design changes. The manufacturer submits a Flight Test Plan (FTP) and a Flight Test Report (FTR).

Flight Test Milestone	Metric
Take-off	0–5 min climb to 1 kft.
Cruise	120 mph at 3 kft.
Landing	Safe touchdown within 300 ft.

What is the FAA’s Phase III and what does it certify?

Phase III is the final certification phase. It validates that the aircraft meets all regulatory requirements and issues the Type Certificate. The aircraft can then be produced and operated.

Certification Outcome	Implication
Type Certificate granted	Manufacturer may sell and operate.
Special Conditions issued	Non-standard compliance path.
Rejection	Design must be revised.

How does EASA’s certification process differ from the FAA’s?

EASA’s process mirrors the FAA but uses different phase labels: A-Phase, B-Phase, C-Phase, and D-Phase. The content of each phase is equivalent, though the documentation is tailored to EASA’s regulatory framework.

What is an EASA G-1 issue paper and how does it start the process?

Like the FAA, EASA requires a G-1 issue paper to initiate the certification. It contains the aircraft’s concept, intended operations, and a preliminary safety assessment.

What are the key milestones in EASA’s Phase A?

Phase A focuses on the design and documentation. The manufacturer submits the Design Data Package (DDP) and the Safety Assessment Report (SAR).

Document	Purpose
DDP	Detailed design, drawings, calculations.
SAR	Risk analysis, mitigation strategies.

What does EASA’s Phase B require?

Phase B is the flight test phase. The manufacturer must conduct a Flight Test Campaign (FTC) covering all operational envelopes.

Test	Metric
Hover	30 s at 0 ft.
Transition	5 min to 2 kft.
Emergency	Battery cut-off at 20 % SOC.

What is the final certification step in EASA’s Phase D?

Phase D culminates in the issuance of a Type Certificate or a Type Certificate Supplement (TCS) if special conditions apply.

How long does each phase typically take for electric aircraft?

Typical timelines: Pre-Certification 6–12 months; Phase I 12–18 months; Phase II 12–18 months; Phase III 12–24 months. Larger electric airliners may extend to 30–36 months.

What is a Technical Information Application (TIA) and why is it critical?

A TIA is a comprehensive document detailing the aircraft’s design, systems, and performance. It is the basis for FAA review and is required before flight testing.

What are Special Conditions and how do they affect certification?

Special Conditions are regulatory deviations granted when standard rules cannot accommodate a novel design. They must be documented, justified, and approved by the FAA or EASA.

How does a manufacturer request a Type Certificate?

After completing all phases, the manufacturer submits a Type Certificate Application (TCA) with all test data, design documents, and compliance evidence. The regulator reviews and, if satisfied, issues the certificate.

What is the difference between a Type Certificate and a Type Certificate Supplement?

A Type Certificate (TC) authorizes the base design. A Type Certificate Supplement (TCS) adds modifications or special conditions that were not covered in the original TC.

What is the role of the Design Review Board (DRB) in the certification process?

The DRB evaluates the aircraft’s design intent, identifies major safety concerns, and sets the direction for subsequent phases.

How do battery performance metrics factor into certification?

Battery energy density (Wh/kg), cycle life, and thermal management are scrutinized. The FAA requires a minimum of 300 Wh/kg for eVTOLs and 200 Wh/kg for electric airliners.

What is the significance of the FAA’s “G-1 issue paper”?

The G-1 issue paper is the formal request to begin certification. It triggers the assignment of a DER and the scheduling of the DRB.

What are the typical cost implications of the certification process?

Estimated costs: $5–10 million for an eVTOL, $20–30 million for an electric airliner. These include design, testing, and regulatory fees.

What is the average time from first flight to Type Certificate issuance?

For electric aircraft, the average is 3–4 years from first flight to Type Certificate, though some programs complete in 2 years.

What are the key regulatory documents a manufacturer must submit?

Key documents: G-1 issue paper, TIA, Flight Test Plan, Flight Test Report, Safety Assessment Report, and the final TCA.

How does the FAA’s “Special Conditions” process differ from EASA’s?

FAA Special Conditions are negotiated during Phase III; EASA issues them during Phase D. Both require a written justification and evidence of compliance.

What are the main differences in the certification timelines between the FAA and EASA?

FAA timelines are typically 3–4 years; EASA timelines can be 2–3 years due to a more streamlined review process for new technologies.

What is the role of the FAA’s Designated Engineering Representative (DER) in certification?

The DER acts as the FAA’s technical liaison, reviewing design documents and ensuring compliance with regulations.

What is the impact of a Type Certificate on market entry for electric aircraft?

Without a Type Certificate, an aircraft cannot be sold or operated commercially. The certificate is the final regulatory green light.

How do manufacturers track certification status in real time?

Both FAA and EASA maintain public databases where the current phase, key dates, and status notes are searchable.

What is the typical duration of the flight test campaign in Phase II?

Flight test campaigns average 180–240 flight hours, covering all operational envelopes and emergency scenarios.

What are the major safety concerns for electric aircraft during certification?

Key concerns: battery thermal runaway, electrical fault isolation, and loss-of-propulsion scenarios.

What is the role of the FAA’s “Type Certificate Supplement” (TCS) in modifications?

A TCS authorizes changes that do not alter the fundamental design, such as avionics upgrades or paint schemes.

What is the significance of the FAA’s “Type Certificate” in the context of resale and leasing?

Only aircraft with a Type Certificate can be resold or leased; the certificate ensures regulatory compliance and insurance eligibility.

What is the typical cost of a Type Certificate for an eVTOL versus an electric airliner?

eVTOLs: $5–10 million; electric airliners: $20–30 million, reflecting larger test fleets and more complex systems.

What are the main challenges for electric aircraft certification?

Challenges: battery safety, integration of electric propulsion, and proving reliability over long flight cycles.

What is the FAA’s “Type Certificate” approval process for hydrogen aircraft?

Hydrogen aircraft follow the same phases but include additional safety assessments for cryogenic fuel handling.

What is the impact of the FAA’s “Special Conditions” on certification timelines?

Special Conditions can add 6–12 months if extensive testing is required to validate the deviation.

What is the FAA’s “Type Certificate” for a hybrid electric aircraft?

Hybrid aircraft are treated as a distinct category, requiring additional propulsion system testing and integration analysis.

What is the role of the FAA’s “Pre-Certification” phase in the overall timeline?

Pre-Certification sets the groundwork, identifies major risks, and establishes the baseline for the subsequent phases.

What is the FAA’s “Phase I” focus for electric aircraft?

Phase I focuses on design and ground testing, ensuring that all systems meet performance and safety requirements.

What is the FAA’s “Phase II” focus for electric aircraft?

Phase II focuses on flight testing, validating the aircraft’s performance across all operational envelopes.

What happens if a manufacturer misses a certification milestone?

Missing a milestone triggers a delay notice from the regulator. The FAA or EASA will issue a “deficiency letter” outlining required corrective actions. If the manufacturer cannot resolve the issue within the stipulated time, the certification schedule is extended, and additional flight tests may be mandated.

How do regional regulatory differences affect electric aircraft certification?

While the FAA and EASA share core safety principles, they differ in data requirements and review timelines. For example, the FAA mandates a 100-hour flight test for large electric airliners, whereas EASA allows a 75-hour campaign if the design demonstrates comparable risk mitigation. These differences can shift overall timelines by 3–6 months.

What are the cost implications of Special Conditions?

Special Conditions often require extra testing, such as isolated battery fault scenarios or high-temperature endurance runs. The additional flight hours can cost $50–$80 k per hour, adding $3–$5 million to the certification budget for a large eVTOL program.

What is the typical duration of a flight test campaign for a hydrogen aircraft?

Hydrogen aircraft flight tests average 250–300 hours, including cryogenic fuel handling drills and emergency landing procedures. The extra 50–70 hours compared to all-electric aircraft reflect the added safety complexity of hydrogen systems.

What are the main failure modes that can derail a certification program?

Common failure modes include battery thermal runaway, inverter failure under high load, and structural fatigue in composite airframes. Each failure mode requires a dedicated mitigation plan; failure to address any can result in a denial of the Type Certificate.

What is the impact of the FAA’s “Type Certificate” on resale and leasing?

Only aircraft with a Type Certificate can be resold or leased; the certificate ensures regulatory compliance and insurance eligibility.

What happens if a manufacturer has a non-standard battery chemistry?

When a new chemistry such as Li-S or solid-state is used, the FAA requires a dedicated Battery Safety Assessment (BSA) that includes accelerated aging, thermal runaway, and cell-to-cell variability studies. The BSA must demonstrate that the energy density meets the 300 Wh/kg minimum and that the thermal envelope stays below 75 °C under fault conditions.

Failure to provide a satisfactory BSA results in a deficiency letter that can delay Phase II by 6–9 months, as additional flight test hours are mandated to validate the chemistry under real-world loads.

How do certification costs differ between a single-pilot eVTOL and a multi-crew electric airliner?

Single-pilot eVTOLs typically incur $5–7 million in certification costs, driven by a smaller test fleet and fewer avionics. Multi-crew airliners can exceed $25 million, largely due to the need for larger flight test fleets, crew-resource management studies, and more extensive structural testing.

Cost drivers include:

Flight test hours: 200–300 for eVTOL vs. 500–700 for airliners.
Avionics integration: $1–2 million extra for multi-crew displays and workload analysis.
Certification engineer time: 20–30% higher for complex systems.

What is the impact of a “deficiency letter” on a certification schedule?

A deficiency letter identifies a specific gap, such as incomplete data on a new control system. The manufacturer must submit a Corrective Action Plan (CAP) within 30 days. If the CAP is rejected, a new deficiency letter is issued, potentially extending the schedule by 3–6 months per cycle.

How does the FAA handle certification of hybrid electric aircraft with internal combustion engines?

Hybrid aircraft must satisfy both electric propulsion and combustion engine regulations. The FAA requires a separate Engine Safety Assessment (ESA) that documents emissions, fuel system integrity, and integration with the electric drive. The hybrid program typically adds 12–18 months to the overall timeline due to the dual certification paths.

What are the key differences between FAA and EASA Special Conditions for battery safety?

FAA Special Conditions often focus on thermal runaway limits and battery management system (BMS) fault isolation. EASA tends to emphasize the overall risk assessment and requires a detailed Safety Assessment Report (SAR) that includes probabilistic risk analysis. In practice, FAA conditions can add 6–8 months, while EASA conditions may add 4–6 months.

What happens if a manufacturer cannot meet the required flight test hours?

Failure to complete the mandated flight test hours triggers a certification hold. The manufacturer must request a Flight Test Extension (FTE) from the regulator, providing a revised test plan and justification. An FTE can add 3–6 months and requires additional funding, typically $1–2 million per 50 extra hours.

How do environmental regulations intersect with type certification for electric aircraft?

ICAO’s Environmental Protection Regulation requires that new aircraft meet noise and emissions criteria. For electric aircraft, noise limits are usually met automatically, but the FAA still requires a Noise Impact Assessment (NIA). The NIA must show peak noise < 65 dB(A) for eVTOLs and < 78 dB(A) for airliners during take-off.

What is the role of a Flight Test Data Management System (FTDMS) in certification?

An FTDMS collects, stores, and analyses flight test data in real time. It must provide traceability for every flight hour and support data integrity checks. The FAA recommends using a system that complies with DO-178C for avionics software and DO-254 for hardware.

What are the typical penalties for non-compliance during the certification process?

Non-compliance can result in civil penalties up to $10,000 per violation, suspension of the certification process, or revocation of the Type Certificate. In extreme cases, the manufacturer may be barred from future certification attempts for five years.

How does a manufacturer handle changes to the airframe after certification?

Post-certification modifications require a Supplemental Type Certificate (STC). The STC process involves submitting a design change document, updated flight test data, and a revised safety assessment. The FAA typically approves STCs within 6–12 months, depending on the complexity of the change.

What is the impact of a “Type Certificate Hold” on market launch?

A Type Certificate Hold pauses all production and flight operations. The manufacturer must resolve the holding issue within 90 days or face a permanent suspension. Market launch is delayed by the duration of the hold plus any required re-testing.

What are the common pitfalls in the FAA’s Phase I documentation?

Common pitfalls include:

Inadequate structural load calculations for high-cycle flight envelopes.
Missing thermal analysis for battery packs under fault conditions.
Insufficient documentation of software safety integrity levels (SIL).

Addressing these early reduces Phase II delays.

What is the typical cost of a Flight Test Extension (FTE) for an electric aircraft?

Each 50-hour extension costs approximately $1.5 million, covering pilot time, aircraft rental, and ground support. The cost scales linearly with additional hours.

What is the role of the FAA’s Designated Engineering Representative (DER) in a multi-crew airliner program?

The DER oversees integration of complex systems such as flight management computers, crew-resource management software, and redundancy architectures. The DER’s review can add 2–3 months to Phase I if significant changes are identified.

How do certification timelines change for a hydrogen-electric hybrid aircraft?

Hydrogen-electric hybrids add an extra 6–12 months for cryogenic safety testing, including pressure vessel certification and fuel leak detection. The overall timeline can extend to 5–6 years from first flight to Type Certificate.

What is the FAA’s stance on using off-the-shelf commercial batteries in aircraft?

The FAA requires that off-the-shelf batteries undergo a full BSA, including cycle life, temperature cycling, and safety testing. Without this, the FAA will issue a deficiency letter, potentially delaying certification by 12 months.

How does the FAA’s “Special Conditions” process affect the cost of a Type Certificate?

Special Conditions can add $3–5 million in testing and documentation costs, depending on the deviation’s complexity.

What is the impact of a “Type Certificate Hold” on the manufacturer’s financials?

A hold can lead to a 20–30% loss in projected revenue per year, plus additional legal and compliance costs.

What is the typical cost of a Type Certificate for a hydrogen aircraft?

Hydrogen aircraft certification costs range from $30–$40 million due to extensive safety testing and infrastructure validation.

Hydrogen aircraft follow the same phases but include additional safety assessments for cryogenic fuel handling.

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Battery capacity (kWh):
Utility rate ($/kWh):

Below is a bar chart showing the time (in months) each certification phase has taken for selected electric and eVTOL programmes.

Where do the figures in this article come from?

Every rule, threshold and definition above is taken from a primary publisher rather than a secondary summary. These are the documents behind them, and each one is worth reading in full before acting on a number: FAA: aircraft certification, EASA: general aviation and new technologies, EASA: type certificate data sheets, ICAO: environmental protection, IEA: aviation.

Frequently Asked Questions

How does a manufacturer track certification status in real time?

Regulators provide online portals (e.g., FAA’s ACARS, EASA’s e-certification platform) where manufacturers can upload documents, receive feedback, and monitor milestone completion.

What is the significance of the FAA’s “G-1 issue paper” in the certification process?

The G-1 paper initiates the formal certification process, outlining the aircraft’s design intent, scope of certification, and preliminary safety assessment.

What is the typical duration of a flight test campaign in Phase II?

Phase II flight tests usually last 300–600 hours, depending on aircraft size and the complexity of the power-train systems.

How long does a typical FAA Phase I documentation review take for a new electric aircraft?

Phase I reviews usually last 6–9 months, depending on the completeness of the design data and the complexity of the power-train architecture. A well-prepared submission can shave a month or two off the schedule.

What is the cost range for an FAA Type Certificate Supplement (TCS) for a single-pilot eVTOL?

Issuing a TCS generally costs between $25 k and $45 k, covering administrative fees, review staff time, and the cost of any required supplemental flight testing.

How can a manufacturer verify that its battery meets the FAA’s “battery safety” criteria before filing a TIA?

Manufacturers should conduct a third-party battery safety assessment (e.g., IEC 62133 or UL 9543) and submit the test report to the FAA. The agency will review the data against its safety matrix and may request additional tests.

What happens if an electric aircraft manufacturer fails to meet a Phase II flight-test milestone?

Failure to meet a milestone triggers a deficiency letter. The manufacturer must submit a corrective action plan within 30 days; otherwise, the FAA may place a hold on the Type Certificate, delaying market entry.

How does the FAA’s “Special Conditions” process affect the cost of a Type Certificate for a hydrogen-electric hybrid?

Special Conditions can add $10 k–$30 k to the certification cost, reflecting the agency’s need for additional design reviews, risk analyses, and possibly extra flight tests to validate the hybrid power-train.

What is the typical duration of a flight-test campaign for a new electric airliner under EASA Phase B?

Phase B flight tests for an electric airliner usually span 12–18 months, covering a range of operating envelopes and contingency scenarios to satisfy EASA’s safety requirements.

How can a manufacturer track its certification status in real time using the FAA’s online tools?