NPA OPS 41 Workshop

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Aerodrome Operating MinimaHead-Up
DisplaysEnhanced Vision Systems

• NPA-OPS 41

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Presenters

• Robert-Jan Venema (CAA NL)
• Chairman, AWOSG
• Tim Price (AEA / British Airways)
• Secretary, AWOSG
• Bo Eckerbert (LS Sweden)
• Retiring Chairman, AWOSG

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Organisations Participating

• AWOSG Member Organisations
• CAA NL
• LS (Sweden)
• DGAC (France)
• CAA UK
• FAA
• AEA (British Airways, BMI, Air France, KLM)
• IFALPA (Braathens)
• EAG UK
• Jeppesen
• ( ICAO Panel Members)

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Background

• OST endorsed NPA OPS 41 in May 05
• Editorial and harmonisation work
• Workshop for industry on 10 Nov 05
• OST further endorsement 30 Nov 05
• RST endorsement end 05
• Public Consultation 1 Mar 31 May 06
• Revision of NPA in light of CRD

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Contents of Todays Presentation

• Rationale for NPA 41
• Contents of the NPA
• Stabilised Approach
• Continuous Descent Final Approach
• Harmonisation work
• Comment Response Period
• Detailed Rule ACJ changes following on from CRD
• Conclusion

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NPA-OPS 41

• The proposal contains draft texts for
• Aerodrome Operating Minima (1.430)
• Comments received post NPA 20, OST, Workshop
• JAA / FAA harmonisation work (ongoing)
• Requirements for Cat I, II and III Operations
  (1.440 and Appendix)
• JAA / FAA harmonisation work
• Introduction of HUD HUDLS
• Introduction of EVS
• Training and qualification requirements for all
  of the above (1.450)

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Stabilised Approach - Background

• CFIT ALARP programmes encouraged authorities to
  prescribe stabilised approach criteria
• SAp An approach which is flown in a controlled
  and appropriate manner in terms of configuration,
  energy and control of the flight path from a
  pre-determined point or altitude/height down to a
  point 50 feet above the threshold or the point
  where the flare manoeuvre is initiated if higher.

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Stabilised Approach and CDFA

• NPA 20 / 41 defines a new method of meeting the
  Stabilised Approach criteria the Continuous
  Descent Final Approach (CDFA) technique
• A specific technique for flying the
  final-approach segment of a non-precision
  instrument approach procedure as a continuous
  descent, without level-off, from an altitude /
  height at or above the Final Approach Fix
  altitude / height to a point approximately 15m
  (50ft) above the landing runway threshold or the
  point where the flare manoeuvre should begin for
  the type of aeroplane flown.

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CDFA and SAp - Benefits

• The CDFA technique aims to increase the safety of
  inter alia Non-Precision Approaches by
  eliminating level flight at MDA, ie close to the
  ground
• Pilot workload is reduced as a/c attitude, power
  and energy are stabilised
• One decision point for the pilot
• The intention is that all approaches should be
  flown using the CDFA technique (if physically
  possible)

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CDFA Technique v Dive Drive NPA
Continuous descent from FAF no level-flight
segment at MDH
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Harmonisation Work

• Further meeting of JAA / FAA AWO Harmonisation
  Working Group in Mar 05
• FAA members participated in AWOSG meetings
• FAA will soon publish revised Ch 3 of TERPS
  (harmonised AOM) for consultation
• NPA41 represents the European end of the
  harmonisation process hence, it is of vital
  importance

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Comment Response Period

• About 200 responses received
• Hard to be precise some were multiple comments
  on one form
• Very useful process much help to the AWOSG from
  interested parties
• Most important none of the comments said this
  is rubbish, get rid of it!
• All were supportive
• Thank you to all who commented

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Detailed Rule, Appendix and ACJ ChangesFrom CRD
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Changes

• No major change has occurred as a result of the
  Comment Period
• The changes fall into 3 main categories
• Editing of the English (many thanks to UK CAA for
  very detailed editorial comments)
• Clarification of what constitutes an approach
  operation, and the techniques which may be
  employed to fly an approach
• Some better definitions

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Changes - CDFA Technique

• Continuous Descent Final Approach
• A specific technique for flying the last part of
  an instrument approach (as proposed by ICAO
  OPSP/7, May 06)
• Not an approach operation in itself
• This clarification is applied throughout the
  NPA41 document, notably in the appropriate ACJ
• Important clarification

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Changes -Enhanced Vision Systems

• An approach may be flown utilising EVS guidance
  to obtain lower minima
• There is no such thing as an EVS approach
• Another important clarification

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Better definitions

• JAR OPS 1.435 Terminology
• (9) CDFA
• (11) HUD
• (14) EVS
• (17) Other than Standard Cat II Operation
• (18) GNSS Landing System new

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Other changes

• Appendix 1 to 1.430
• (c) Criteria for establishing RVR / Converted Met
  Visibility clarified
• (d)(5) Clarification of the requirements for
  allowing an RVR of lt750m
• Table 4. Lighting-system definitions improved and
  aligned with ICAO
• (f) Requirements for Cat II and OS Cat II
  clarified
• (j) Requirements for Circling clarified
• ACJs improved

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Conclusion

• No major changes have been made since OST 05/2
• Many of the items have been endorsed separately
  by the OST at various times in the past
• Circling ACJ
• HUD material
• NPA 20
• NPA 41 (first draft reworking)
• This major reworking of Sub Part E is overdue and
  should be well received by the aviation community

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Questions??

• Robert-Jan Venema (robert-jan.venema_at_ivw.nl)
• Tim Price (tim.price_at_ba.com)

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