STAND-ALONE APPROACH OPERATIONS FOR CLASS A GPS

1. STAND-ALONE APPROACH OPERATIONS FOR CLASS A GPS ARAB INSTRUMENT PROCEDURE DESIGN SEMINAR

2. DOCUMENTATION • Basic documents • TSO C129() • TGL( Temporary guidance Leaflet 3 rev 1 • French technic note SFACT/N.ST/AVI N°1 • Future • TGL on Approach operations in progress Approbation GPS classe A sur approche

3. Installation à titre d ’information 230° Annonciateurs extérieurs INSTALLATION GPS CLASSE A TYPE LFYY BRL NAV MSG GPSWPT APPR MAP 23 FAF 23 2.6 Nm IF 23 IAF 23 Antenne GPS 1 GPS 1 Interface aéronef (altitude,cap,..). HSI 1 NAV MSG GPSWPT APPR XTLK Antenne GPS 2 GPS 2 OBS 2 Approbation GPS classe A sur approche

4. 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 Approbation GPS classe A sur approche

5. PATH TERMINATOR • Class A can interpretate very few Path terminator • eg: TF • Solution : use only TF as in Y and T concept Approbation GPS classe A sur approche

6. 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 Approbation GPS classe A sur approche

7. WHAT PROPOSALS? 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 Approbation GPS classe A sur approche

8. IAF IAF INITIAL SEGMENT IAF IF INTERMEDIATE SEGMENT Turn initiation FAF FINAL SEGMENT MAPt Y BAR DESIGN CONCEPT 70° TF coding Approbation GPS classe A sur approche

9. INITIAL SEGMENT INTERMEDIATE SEGMENT FINAL SEGMENT IAF T BAR DESIGN CONCEPT 90° IAF IAF IF Turn initiation FAF MAPt Approbation GPS classe A sur approche

10. 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 % Approbation GPS classe A sur approche

11. B D IAWP IWP B/2 A A/2 FAWP DESCENT GRADIENT CALCULATION Gradient = h / TRD TRD = D -(r* tanB/2) - ( r *tanA/2 ) + (r*/180*B/2) + (r* /180* A/2) Approbation GPS classe A sur approche

12. D IAWP IWP A D = R.Tan(A/2)+ATT FAWP GNSS Protection area for initial segment

13. NOW IT IS TIME FOR TRIALS ! Approbation GPS classe A sur approche

14. 034° PAMIERS DEPARURE Solution : USE TF path terminator Approbation GPS classe A sur approche

15. Montpellier Solution : USE another WP to impose the turn direction Approbation GPS classe A sur approche

16. Visual Primary field Information of GPS Activation Approbation GPS classe A sur approche