ETOPS
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ETOPS
Hello everyone....I have a few questions on etops....
Can someone please tell me...specific to the A330...what system failures (hydraulics,electrical etc) require a etops diversion?
Thank you.
Also,how many gens are required for etops?
Can someone please tell me...specific to the A330...what system failures (hydraulics,electrical etc) require a etops diversion?
Thank you.
Also,how many gens are required for etops?
Join Date: Jul 2008
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FCOM-PRO-SPO-EXTENDED RANGE OPS
The technical criteria governing a re-routing or diversion decision can be classified into four
categories, as follows:
‐ Loss of MNPS capability, before entering the MNPS area (as applicable).
‐ Weather minima at diversion airport(s) going below the company/crew en-route minima, before
reaching the ETOPS Entry Point, or diversion airport(s) becoming unsuitable for any reason.
‐ Failure cases requiring a diversion to the nearest airport (cases leading to a LAND ASAP message
on the ECAM and/or in the QRH).
‐ Failure cases resulting in increased fuel consumption, exceeding the available fuel reserves.
Comments and recommendations
‐ Electrical generation
Diversion is required in case of:
• Only one generator (either one IDG, APU GEN or EMER GEN) remaining available following a multiple failure,or
• Only one main generator (either one IDG or APU GEN) remaining available, and low level, low pressure or overheat on the green hydraulic circuit.
‐ Fuel system
Some failure cases may lead to fuel gravity feeding which implies flight at lower altitude or to some
fuel being unusable. The flight crew’s evaluation of the actual situation and the fuel remaining may
lead to the decision that a diversion is required.
To dispatch an ETOPS flight, you need three sources and EMER GEN must be operative anyway. Check MEL.
The technical criteria governing a re-routing or diversion decision can be classified into four
categories, as follows:
‐ Loss of MNPS capability, before entering the MNPS area (as applicable).
‐ Weather minima at diversion airport(s) going below the company/crew en-route minima, before
reaching the ETOPS Entry Point, or diversion airport(s) becoming unsuitable for any reason.
‐ Failure cases requiring a diversion to the nearest airport (cases leading to a LAND ASAP message
on the ECAM and/or in the QRH).
‐ Failure cases resulting in increased fuel consumption, exceeding the available fuel reserves.
Comments and recommendations
‐ Electrical generation
Diversion is required in case of:
• Only one generator (either one IDG, APU GEN or EMER GEN) remaining available following a multiple failure,or
• Only one main generator (either one IDG or APU GEN) remaining available, and low level, low pressure or overheat on the green hydraulic circuit.
‐ Fuel system
Some failure cases may lead to fuel gravity feeding which implies flight at lower altitude or to some
fuel being unusable. The flight crew’s evaluation of the actual situation and the fuel remaining may
lead to the decision that a diversion is required.
To dispatch an ETOPS flight, you need three sources and EMER GEN must be operative anyway. Check MEL.
