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Extended Diversion Time Operations

Extended Diversion Time Operations. Presented by Mark Sinclair, CASA. Extended Diversion Time Operations. Applies to all turbine-engine aircraft Flight time - 1 engine inoperative cruise speed - from point on route to adequate aerodrome is > threshold time. Prior ETOPS

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Extended Diversion Time Operations

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  1. Extended Diversion Time Operations Presented by Mark Sinclair, CASA

  2. Extended Diversion Time Operations • Applies to all turbine-engine aircraft • Flight time - 1 engine inoperative cruise speed - from point on route to adequate aerodrome is > threshold time. • Prior ETOPS • CAO 82.0 amended - new EDTO rules

  3. EDTO vs ETOPS • EDTO • Affects all aircraft • Alternates Aerodromes • Threshold 90 mins • Range circles 410nm - 60mins, 800nm-120mins. • Same weather holding requirements • Window of suitability buffer not applicable

  4. EDTO Rules • EDTO operations rules provided under • ICAO annex 6 • CAO 82.0

  5. Aeroplane Eligibility for EDTO • EDTO approval eligible - must have EDTO type design approval in: • Flight Manual or supp or • Type Cert. Data Sheet or Supp Type Cert.

  6. Threshold Time • More than 19 passengers or max payload capacity exceeds 3410kg: • twin engine – 90 minutes; or • more than 2 engines – 180 mins

  7. Route Distance Limitations • Piston-engined aeroplanes • MTOW exceeds 5700 Kg • Engaged in charter or regular public transport • Limited route • no point > 60 mins • 1 eng inoperative cruise speed • from adequate aerodrome

  8. Piston > 5700 Kg 60 min EDTO Turbine < 19 passengers and > 5700 Kg 180 min EDTO (120, 180, 240) <90 min 60 min <75 min Twin Turbine > 19 pax or > 3410 Kg payload EDTO Three, Four Turbine Engine (Passenger Operations Only) 180 min

  9. Adequate Aerodrome • CAO 82.0 • Physical requirements • Provides facilities and services for type • meteorological forecasts • authorised instrument approach

  10. EDTO Alternate Aerodrome • adequate aerodrome listed in AOC holder’s EDTO safety operational specifications • inside Australian territory • outside Australian territory

  11. ETP Critical Fuel Scenario • CAO 82.0 s6.1 • EDTO flight cannot depart unless fuelled to cover most limiting scenario • Depressurisation 2 engines • Depressurisation 1 engine • Failure 1 engine

  12. Calculate ETP Critical Fuel Scenario • ID most limiting scenario then include: • Fuel burn-off • 15 minutes hold at 1500ft • Fuel for and instrument approach and landing • 5% wind speed factor • 5% PDA • Add fuel required by M.E.L / enroute icing

  13. Earliest & Latest Times of Arrival • Earliest ETA • add to ETD, interval dep point to ETP, estimate elapsed time from critical point to EDTO Alternate Aerodrome. • Latest ETA • add to ETD, interval dep point to ETP, estimate elapsed time from that point back to EDTO Alternate Aerodrome. • No 30 min buffers as with ETOPs

  14. Window of Suitability • time between earliest possible ETA and latest possible ETA, for specific EDTO Alternate Aerodromes. • forecast weather conditions, must meet EDTO Dispatch Minima requirements for entire period. • No 30min buffer in calculation

  15. EDTO Dispatch Minimas • CAO82.0 Appendix 5 .Table 1 • New EDTO dispatch minima adds a buffer based on: • accuracy of approach aid • ability to control aircraft • reliability of approach aid • and crew workload • Note: only ILS precision approach

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