Extended Diversion Time Operations

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Extended Diversion Time Operations

• Presented by Mark Sinclair, CASA

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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 gt
  threshold time.
• Prior ETOPS
• CAO 82.0 amended - new EDTO rules

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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

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EDTO Rules

• EDTO operations rules provided under
• ICAO annex 6
• CAO 82.0

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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.

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Threshold Time

• More than 19 passengers or max payload capacity
  exceeds 3410kg
• twin engine 90 minutes or
• more than 2 engines 180 mins

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Route Distance Limitations

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

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(No Transcript)
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Adequate Aerodrome

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

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EDTO Alternate Aerodrome

• adequate aerodrome listed in AOC holders EDTO
  safety operational specifications
• inside Australian territory
• outside Australian territory

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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

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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

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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

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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

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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