A380 - EDTO Flashcards
What does EDTO stand for?
Extended Diversion Time Operations
Introduced by ICAO in 2012 to reflect modern safety considerations for transport-category turbine-engine aircraft.
What is the primary regulation governing EDTO?
CASR Part 121 Manual of Standards (MOS)
Includes Chapter 2 for EDTO and Chapter 4 for Flight Preparation.
What is the EDTO threshold time for the A380?
180 minutes (1500nm)
A flight exceeding this time/distance to an Adequate Airport must be conducted as an EDTO.
When was ETOPS introduced and what does it stand for?
Introduced in 1985, Extended Range Twin-Engine Operations
Allowed twin-engine aircraft to operate more than 60 minutes from an alternate airport.
What are the key requirements for EDTO approval?
- Electrical power redundancy (min 3 gens)
- APU cold soak start capability (for twins)
- Cargo compartment fire suppression
- Communication redundancies
- System redundancy
- Icing protection
- MEL limitations for EDTO
These requirements ensure safety during extended operations.
True or False: The term EDTO has been universally adopted by all states.
False
Not all states have adopted the term EDTO; some still use ETOPS.
What is the maximum diversion time for an A380 in EDTO operations?
275 minutes
This is derived from the cargo compartment fire suppression system endurance of 290 minutes, less 15 minutes.
What does the acronym EEP refer to in EDTO?
Entry Point
The point where the aircraft exceeds the EDTO threshold time.
What is the purpose of the EDTO Alternate?
To provide an Adequate Airport forecasted to meet defined weather criteria
It must be available within specified time frames for EDTO operations.
What does the term CPE refer to in the context of EDTO?
Critical Point EDTO
The most fuel-critical Estimated Time of Arrival (ETA) between any two EDTO Alternates.
Fill in the blank: The EDTO segment extends from the __________ to the __________.
EEP, EXP
EEP is the point where the aircraft exceeds the EDTO threshold, and EXP is the point from which the aircraft remains within the EDTO threshold time.
What is required for the A380’s critical scenario during EDTO operations?
One Engine Inoperative (OEI) plus depressurisation
This scenario is critical for calculating EDTO fuel requirements.
What does the term LROPS stand for?
Long Range Operations
Adopted by EASA for three and four-engine aircraft.
What factors are considered in EDTO weather assessment?
- Forecast ceiling
- Visibility
- Crosswind (for OEI)
These factors are evaluated during preflight and inflight assessments.
What is the significance of the term ‘Adequate Airport’ in EDTO?
Refers to airports that meet defined criteria for supporting EDTO operations
Includes Category A, B, or C airports.
What is the maximum holding fuel time for EDTO?
15 minutes
What critical scenario applies to the A380 during EDTO?
One Engine Inoperative and Depressurised
What factors are applied to the CPE calculation for EDTO?
Forecast wind and temperature, plus a 5% wind factor
What indicates that an aircraft is approved for 275 minutes EDTO?
A ‘Y’ in the ER box of the Tech Log
What does ‘N’ indicate in the ER box of the Tech Log?
Non-EDTO (limited to 180 minutes)
What does the EDTO Data page in EFF+ provide to the crew inflight?
Situational awareness related to EDTO area and maximum diversion time
What are the maximum diversion times for EDTO?
(180/275) minutes
What must be ensured prior to passing the EEP?
Two-way comms with ATC and Flight Dispatch, Inflight Fuel Requirements met, significant system failures reviewed
What should be assessed prior to passing the EEP?
EDTO Alternate usability and weather
What indicates a significant system failure during EDTO?
A ‘LAND ASAP’ ECAM
What is the requirement for landing after a significant system failure in EDTO?
Land at a Category A, B, or C airport within the defined EDTO Maximum Diversion Time
What are the three EDTO diversion strategies available for the A380?
- Time Strategy
- Obstacle Strategy
- Fuel Strategy
What is the focus of the Time Strategy in EDTO diversion?
Minimizes fuel burn but increases diversion time
What is a caution when entering an ATS WPT in the Active Route?
It may cause problems with CPDLC/ADS route data to ATC
What is the requirement for flight time to the landing airport during EDTO?
Must not exceed the flight time to the nearest suitable airport unless deemed safer
What are the suggested references for crew before operating a Polar flight?
- CASR Part 121 MOS 2.08
- FAM > POLAR OPS 15.13
- RMS > POLAR REGIONS 4.3.3
- FCOM > Aircraft Systems (FMS, CDS, Surveillance)
What does the ‘Land ASAP’ ECAM indicate?
A time-critical situation requiring immediate landing planning
What are the altitude profiles during the EDTO diversion strategies?
- Descent (Standard or Obstacle)
- Cruise up to VMO/MMO
- Descent to land up to VMO/MMO
What is the significance of the EDTO entry and exit points?
They may be entered as Waypoints or a Fix in the FMS
What is the maximum diversion time for aircraft dispatched on EDTO?
275 minutes
What does the EDTO Data page assist with inflight?
Providing situational awareness for planned alternate airports
What must be reviewed before proceeding past the EEP?
NOTAMS and messages from relevant EDTO Alternates
Fill in the blank: EDTO applies when more than _______S or _______N.
60°S or 78°N
