Transcript Document
Extended Diversion Time Operations Presented by Mark Sinclair, CASA CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY EDTO Rules • EDTO operations rules provided under • ICAO annex 6 • CAO 82.0 CIVIL AVIATION SAFETY AUTHORITY 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. CIVIL AVIATION SAFETY AUTHORITY Threshold Time • More than 19 passengers or max payload capacity exceeds 3410kg: • twin engine – 90 minutes; or • more than 2 engines – 180 mins CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY 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) CIVIL AVIATION SAFETY AUTHORITY 180 min Adequate Aerodrome • CAO 82.0 • Physical requirements • Provides facilities and services for type • meteorological forecasts • authorised instrument approach CIVIL AVIATION SAFETY AUTHORITY EDTO Alternate Aerodrome • adequate aerodrome listed in AOC holder’s EDTO safety operational specifications • inside Australian territory • outside Australian territory CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY 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 CIVIL AVIATION SAFETY AUTHORITY