Lilium details next stages in their development plans

Lilium details next stages in their development plans

19-Nov-2021 Source: Lilium

With the all electric Lilium Jet we are building a radically better way of moving – our innovative aircraft design can be a true game-changer. The development of a new commercial aircraft requires vision, but also meticulous planning and discipline. The task ahead is to ensure that we execute on the design, engineering, certification and manufacturing to successfully bring that product to market.

For an aircraft, development is unforgiving and there can be no compromise on safety.

We are designing our Lilium Jet on the principles of simplicity, manufacturability and scalability, and for the achievement of certification.

Our processes have been developed within a well recognized regulatory framework. In 2017, we applied for Design Organization Approval (DOA), the regulatory approval required for organizations to design and certify new aircraft from the European Union Aviation Safety Agency (EASA). In parallel, we applied for a Production Organization Approval (POA) from the Luftfahrt-Bundesamt (LBA) – the national Civil Aviation Authority of Germany – to enable us to manufacture and produce aircraft at scale. Like DOA, POA is a fundamental requirement for all commercial aircraft manufacturers in Germany. We would expect DOA to be granted shortly before Type Certification, and DOA would enable us to receive POA, provided we have successfully met the requirements of these authorities.

Lilium is pursuing a cross validation between EASA and the US regulatory authority, the Federal Aviation Administration (FAA). In 2018, we applied for a concurrent Type Certificate validation of the Lilium Jet with the FAA, with EASA as our lead certifying authority. The certification basis (CRI-A01) was agreed with and issued by EASA in 2020. To ensure we receive concurrent certification with FAA as planned, we continue to pursue standard protocols and have been working closely on technical familiarization with FAA, in parallel with our primary discussions with EASA.

For operations of the Lilium Jet in Brazil, a validation of the EASA type certificate would have to be obtained by the national regulatory authority, Agência Nacional de Aviação Civil (ANAC), under the existing bilateral agreement between the European Union and Brazil and established Technical Implementation Procedure for EASA and ANAC coordination. While Lilium continues to advance the certification programs with EASA and the FAA, best practices from these programs could be leveraged during early engagement between Lilium and ANAC for the Type Certificate validation. We expect the Lilium Jet to be added onto an Azul Air Operator Certificate (AOC), and Lilium would pursue the necessary operational rulemaking activities jointly with ANAC and Azul.

To enable certification, we follow a structured aircraft Program Development Plan (PDP) with defined milestones called maturity gates. Based on the development plan, activities are synchronized across the Company. As we advance, we assess the program status at each maturity gate before moving on to the next stage. Disciplined program management significantly reduces the risk of major delays and disruptions further down the line.

  • Compliance to regulatory requirements
  • Payload
  • Cruise & Maximum Speed
  • Maximum Range
  • Operational Capabilities (e.g. Visual Flight Rules, Instrument Flight Rules)
  • Charge Time
  • Noise during takeoff
  • Recurring cost
  • Annual operating cost
  • Program & production cost
  • Adherence to Program Schedule

There are of course, many other attributes that need to be addressed thoughtfully in order for an aircraft program to be successful. The set above is deliberately shortened to emphasize those aspects we believe are important in a regional eVTOL aircraft development Program.

Program Maturity Gates

In the following outline, we describe the most important current and future maturity gates and their significance for the Lilium Jet development program. Our key gates on the route to certification and entry into service (EIS) can essentially be summarized as follows:

  1. Prior to Preliminary Design Review (PDR)
  2. Preliminary Design Review (PDR)
  3. Critical Design Review (CDR)
  4. Production Start
  5. Ground Test & First Flight of Conforming Aircraft
  6. Type Certificate & EIS

 

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