STANDALONE APPROACH OPERATIONS FOR CLASS A GPS

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STAND-ALONE APPROACH OPERATIONS FOR CLASS A GPS
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DOCUMENTATION

• Basic documents
• TSO C129()
• TGL( Temporary guidance Leaflet 3 rev 1
• French technic note SFACT/N.ST/AVI N1
• Future
• TGL on Approach operations in progress

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INSTALLATION GPS CLASSE A TYPE
Installation à titre d information
230
Annonciateurs extérieurs
LFYY
BRL
NAV MSG GPS WPT APPR
MAP 23
FAF 23
IAF 23
IF 23
2.6 Nm
Antenne GPS 1
Interface aéronef (altitude,cap,..).
GPS 1
HSI 1
NAV MSG GPS WPT APPR
XTLK
Antenne GPS 2
GPS 2
OBS 2
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TROUBLES

• Ergonomy
• adequate integration in the aircraft
• Data base contents
• No mandate to be in compliance with ARINC code
  424
• Troubles with CF path terminator
• Direction of turn
• Bad turn inititation

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PATH TERMINATOR

• Class A can interpretate very few Path
  terminator
• eg TF
• Solution use only TF as in Y and T concept

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EUROPE AIRWORTHINESS POINT OF WIEW

• Equipment requirement TSO C 129a
• Class A1
• Improvement of integrity requirement.
• Improvement of Mode Activation
• TSO C129 is acceptable if previous criteria are
  achieved.
• Validation of turn initiation criteria
• Compliant with ED 75 (RNP MASP) or equivalent.
• Lot of gaps in TSO C129

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Validation and checking of the on board material
based on specific flight trials To carry out at
least 3 approach procedure.Evaluation of the
turn initiation fonction Evaluation of Missed
approach phase with autopilot.Evaluation of FTE
(manual, flight director and autopilot)TGL
devoted to approach ( RNP 0.3)Solution can be
 T  or  Y  approach.Recommeded function
Display system as electornic map
WHAT PROPOSALS?
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Y BAR DESIGN CONCEPT
70
TF coding
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T BAR DESIGN CONCEPT
IAF
90
IAF
IAF
IF
FAF
Turn initiation
MAPt
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APPROACH CONSTRAINT

• Length
• minimum stabilization distance (MSD)
• Initial Optimal 5 Nm
• Intermediate min 2 Nm MSD
• Final Optimal 5 Nm
• AREA
• IAWP , MATWP ,MAHWP
• 1/2 AW 5Nm XTT 1.5 Nm ATT 1 Nm
• FAWP 1/2 AW 2Nm XTT 0.6 Nm ATT 0.3 Nm
• MAWP 1/2 AW 1Nm XTT 0.5 Nm ATT 0.3 Nm
• Descent Gradient
• Initial max 8 optimal 4
• Final 6.5 cat A/B / 6.1 CAT C/D , 4.3
  optimal 5

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DESCENT GRADIENT CALCULATION
Gradient ?h / TRD
TRD D -(r tanB/2) - ( r tanA/2 )
(r?/180B/2) (r ?/180 A/2)
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GNSS Protection area for initial segment
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(No Transcript)
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PAMIERS DEPARURE
Solution USE TF path terminator
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Montpellier
Solution USE another WP to impose the turn
direction
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Visual Primary field
Information of GPS Activation