Avionics News May 2019 - 51

that in the event of a failure, including fire, of any one
SC-VTOL Subpart A, General, lays out some
component in the system does not result in the loss of
definitions and assumptions. For example, the SC can
energy storage or supply of another system. Systems
apply to aircraft with a pilot on board, remotely piloted,
must also be designed to prevent catastrophic events due
or with various degrees of autonomy, adding that any
to lightning strikes and have a means to safely remove or
references to "flight crew" should be considered "as
isolate the energy stored within the system.
applicable."
Subpart F, Systems and Equipment, focuses on
Subpart A also establishes two categories of aircraft.
general requirements applicable to all systems and
Category Enhanced is an aircraft "capable of continued
equipment in the aircraft. For example, all equipment
safe flight and landing after critical malfunction of thrust/
and systems must be designed and installed so that
lift. Aircraft intended for operations over congested areas
catastrophic failure condition is extremely improbable
or for commercial air transport operations of passengers
and doesn't result from a single failure. (The SC
must be certified in this category."
explains for Category Enhanced, failure conditions that
Throughout the SC-VTOL document, higher
prevent continued safe flight and landing are considered
requirements are mandated for Category Enhanced
catastrophic.) This section explains
aircraft, ranging from sufficient
lightning detection and recovery
protection from bird strikes to
requirements as well as external
adequate in-service monitoring
The
EASA
believes
and cockpit lighting minimums.
of equipment and systems which
these standards will
SC-VTOL Subpart F would also
failure may cause hazardous or
help
enable
safe
require cockpit voice recorders
catastrophic consequences.
implementation of
and/or flight data records to
Category Basic is an aircraft
urban
air
mobility
support accident investigations.
"capable of a controlled emergency
and air taxi aircraft.
Flight crew interface and
landing after critical malfunction of
other information are discussed
thrust/lift."
in Subpart G. For example, the
Subpart B, Flight, establishes
flight crew interface design must
minimum standards for mass and
allow for a controlled emergency landing after the loss
center of gravity, performance data, flight envelopes,
of vision through any windshield panel, for Category
control forces, and flight in icing conditions.
Enhanced. This section also describes instrument
Subpart C, Structures, covers structural loads,
markings, aircraft flight manual information, and
structural performance, and structural occupant
instructions for continued airworthiness.
protection. It includes requirements for a manufacturer
The EASA believes these standards will help enable
to develop and implement inspections to prevent
safe implementation of urban air mobility and air
structural failures "due to foreseeable causes of strength
taxi aircraft. Of course, writing design standards is
degradation" to minimize hazards due to structural
relatively easy work from a regulator's standpoint -
damage caused by high-energy fragments from an
meeting those requirements is more difficult from the
uncontained thrust/lift unit or rotating-machinery failure.
industry's perspective. The regulator's real challenge is
Subpart C also discusses requirements for protection
in developing requirements for the operational aspects of
of occupants, even when damaged in an emergency
VTOLs to ensure safe integration with other aircraft.
landing.
The EASA accepted public comment on SC-VTOL-01
Subpart D is dedicated to design and construction,
and now is considering those comments for a final draft.
covering flight control systems, landing gear, flotation,
Learn more about CS-23 at aea.net/regulatory/
occupant system design protection, and fire and highregulatoryupdates_item.asp?ID=854.
energy protection.
Learn more about the proposed special condition at
Subpart E, Thrust/Lift System Installation, includes
easa.europa.eu/document-library/product-certificationenergy storage systems. It requires independence
consultations/proposed-special-condition-vtol. q
between multiple storage energy and supply systems so
avionics news

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may

2019

51


http://www.aea.net/regulatory/regulatoryupdates_item.asp?ID=854 http://www.aea.net/regulatory/regulatoryupdates_item.asp?ID=854 http://easa.europa.eu/document-library/product-certification-consultations/proposed-special-condition-vtol http://easa.europa.eu/document-library/product-certification-consultations/proposed-special-condition-vtol

Avionics News May 2019

Table of Contents for the Digital Edition of Avionics News May 2019

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Avionics News May 2019 - Intro
Avionics News May 2019 - No label
Avionics News May 2019 - Cover2
Avionics News May 2019 - 1
Avionics News May 2019 - 2
Avionics News May 2019 - 3
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Avionics News May 2019 - Cover3
Avionics News May 2019 - Cover4
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