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EDTO philosophy is to?
Preclude - less diversions through better reliability and maintenance
Protect - Rules protect A/C required to divert to make as safe as possible
What approvals are needed for EDTO?
Type Approval - manufacturer must have demonstrated that the A/C complies
Operational approval - (up to 180mins) operator demonstrate competence to the regulator
Beyond 180mins, must have at least 12 months experience with type and engine, and have SATCOM
Dispatch requirements for EDTO beyond 180mins
what MUST be 100% servicable?
- Fuel Quantity indicators
- AutoLand capability on one engine.
Define an EDTO operation
Ops over routes that contain a point further than 60mins flying time (180mins 3-4 engine A/C) from an adequate aerodrome at the approve one engine inop cruise speed in still air
Define EDTO Entry/Exit point
The first of last point on the route where the A/C is 60mins away.
Alternate Aerodrome must have what?
- Appropriate Fire/Rescue service (ICAO Cat 4) available within 30mins
- PAPI, VASI or an ILS
- Met Forcast is available
- At least one instrument approach
- ATC or AFIS that can be started at 30mins before expected arrival
- Medium intensity runway lights for night ops
What happens, once in flight, the weather at an EDTO enroute alternate falls below landing minima,
A new plan must be made as this alternate can no longer be used.
Note: at the dispatch stage, different alternate requirements are used, relating to number of runways etc
Define Max diversion Time
Granted by CAA - usually 120 or 180mins
Gives the EDTO area of operation for planning purposes
For greater than 180mins (where approved) range circles are wind and temp corrected
Fuel Requirements for EDTO
The Greater of
Flight to EDTO alternate from the most critical point ETP (CP) after suffering an engine failure, decompression, or both.
15mins hold fuel at 1500ft and then instrument approach and landing
APU and anti icing requirements
Adequate Aerodrome must have what?
Suitable in length for A/C
PAPI, VASI or an ILS