Transcript HUDEVS Ad Hoc Working Group May 06

oint Aviation Authorities
Enhanced Vision Systems
Terry Neale & Alex Hartland UK CAA
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Introduction
• What is EVS
• Background
• Evaluation
• Rule change proposal
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What Is a Enhanced Vision
System?
• Proposed JAA Definition
• Enhanced Vision System (EVS). An
aeroplane system which uses sensing
technology to provide a real time image of
the outside world, displayed to the pilot on
either a HUD or head- down display. It
includes all sensors, computers, power
supplies, display systems, indicators and
controls.
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The System
• Nose-mounted
infrared camera
• Image-processing
software algorithms
• Live conformal image
displayed on the Head Up
Display (HUD) combiner
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Background
•Enhanced Vision Systems certified on
Bombardier and Gulfstream aircraft
•Work at advanced stage for Dassault aircraft
•Programmes in place for larger aircraft
•Published FAA airworthiness and operational
regulations
•On the work programme of the ICAO Operations
Panel
•Need for rule material!
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Flight Evaluations
• FAA Proof of Concept (Gulfstream aircraft)
• FAA Certification projects
(Gulfstream/Bombardier)
• Transport Canada Certification (Bombardier)
• JAA Certification projects
(Gulfstream/Bombardier)
• JAA JOEB Evaluations
(Gulfstream/Bombardier)
• JAA AWOSG Demonstrations (5 members)
(Gulfstream)
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Weather Conditions Evaluated by
JAA
• Low cloud
• Advection Fog (RVR 300-1000 metres)
• Radiation Fog (RVR 300-1000 metres)
• Night VMC approaches in mountainous terrain
• Snow Showers
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Conclusions for Infra Red Based
EVS
• No significant benefit in RVRs less than 300
metres and solid cloud
• Benefit can be very variable depending on type
of fog on the day
• Good benefit in night VMC operations
particularly in hazardous terrain
• Benefits in taxi operations at night and in low
visibilities
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Rationale for Rule Development
• Fit within current JAA operational regulations
• Harmonised as much as possible with FAA
• Give a benefit appropriate to the equipment
performance
• Cater for the variability of EVS performance
• Anticipate the risks associated with new
technologies prior to wide scale operational
experience
• Acknowledge the overall benefit in all operating
phases of fitting this equipment.
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The Proposed Rule
(1)A pilot using an enhanced vision systems
certificated for the purpose of this
paragraph may:
(i) Continue an approach below DA(H) or
MDA(H) to 100 feet above the threshold
elevation of the runway provided that he
has at least one of the following visual
references displayed on the enhanced
vision system:
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The Proposed Rule
(A) Elements of the approach lighting; or
(B) The runway threshold, identified by at
least one of the following: the beginning of
the runway landing surface, the threshold
lights, the threshold identification lights;
and
(C) The touchdown zone, identified by at
least one of the following: the runway
touchdown zone landing surface, the
touchdown zone lights, the touchdown zone
markings or the runway lights.
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The Proposed Rule
• (ii) Reduce the calculated RVR for the
approach from the value in column 1 of
table 9 below to the value in column 2:
• 1.430(a)(2) Notwithstanding paragraph (a)(1)
above, in-flight calculation of minima for
use at unplanned alternate aerodromes
and/or for EVS approaches may be carried
out in accordance with a method acceptable
to the Authority.
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RVR Credit Table (extracts)
RVR/CMV Normally
required
RVR/CMV used for
EVS approach
550
350
600
400
1000
650
1500
1000
2000
1300
2500
1700
3000
2000
4000
2600
4500
3000
5000
3300
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The Proposed Rule
(2) Paragraph (h)(1) above may only be used
for ILS, MLS, GLS, and PAR approaches
with a DA(H) no lower than 200 feet or an
approach flown using certified vertical flight
path guidance to a MDA(H) or DA(H) no
lower than 250 feet.
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The Proposed Rule
(3) A pilot may not continue an approach below 100
feet above runway threshold elevation for the
intended runway, unless at least one of the visual
references specified below is distinctly visible and
identifiable to the pilot without reliance on the
enhanced visual system:
(A) The lights or markings of the threshold; or
(B) The lights or markings of the touchdown
zone.
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ACJ – Need for Qualifying Equipment
• Qualifying EVS equipment
• 3.1 An enhanced vision system certificated for the
purpose of Appendix 1 to JAR-OPS 1.403(h) will
typically have:
• (i) A head up display system (capable of displaying,
airspeed, vertical speed, aircraft attitude, heading,
altitude, command guidance as appropriate for the
approach to be flown, path deviation indications, flight
path vector, flight path angle reference cue and the
EVS imagery),
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ACJ
• (ii) A radio altimeter system,
• (iii) For two pilot operation, a head-down view
of the EVS image, or other means of displaying
the EVS-derived information easily to the pilot
monitoring the progress of the approach,
• 3.2 For operations in RVRs below 550m twopilot operation will be required.
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Summary
• EVS is here and will only get better
• Other regulators have responded to the
requirement for a rule change
• Demand from industry and manufacturers is
high
• A lot of work has already been done
• Draft rule change has been published
• Certification and Ops coordination needed!
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Any questions?
Terry Neale
UK CAA – GV JOEB Chairman
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