If the total flight plan distance is 300 NM, what is the radius of the fuel ERA circle and the distance from the destination to its centre?

The radius is 60 NM (20% of 300 NM). The centre distance from the destination is the greater of 75 NM (25% of 300 NM) or 60 NM + 50 NM = 110 NM, so 110 NM.

What is the radius of the circle within which the fuel ERA aerodrome must be located?

The radius is equal to 20% of the total flight plan distance.

What is the minimum distance from the destination aerodrome to the centre of the fuel ERA circle?

The minimum distance is 20% of the total flight plan distance plus 50 NM, if that is greater than 25% of the total flight plan distance.

If the total flight plan distance is 1000 NM, what is the radius of the fuel ERA circle and the distance from the destination to its centre?

The radius is 200 NM (20% of 1000 NM). The centre distance from the destination is the greater of 250 NM (25% of 1000 NM) or 200 NM + 50 NM = 250 NM, so 250 NM.

AMC7 CAT.OP.MPA.181 Fuel/energy scheme -- fuel/energy planning and in-flight re-planning policy -- aeroplanes

Q: How should the fuel en route alternate (fuel ERA) aerodrome be located when reducing contingency fuel to 3%?

The fuel ERA aerodrome should be located within a circle with a radius equal to 20% of the total flight plan distance; the centre of this circle lies on the planned route at a distance from the destination aerodrome equal to 25% of the total flight plan distance, or at least 20% of the total flight plan distance plus 50 NM, whichever is greater. All distances should be calculated in still-air conditions.

Q: Where is the centre of the circle for locating the fuel ERA aerodrome?

The centre lies on the planned route at a distance from the destination aerodrome equal to 25% of the total flight plan distance, or at least 20% of the total flight plan distance plus 50 NM, whichever is greater.

Q: In what conditions should all distances for locating the fuel ERA aerodrome be calculated?

All distances should be calculated in still-air conditions.

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AMC7 CAT.OP.MPA.181 Fuel/energy scheme — fuel/energy planning and in-flight re-planning policy — aeroplanes

ED Decision 2022/005/R

BASIC FUEL SCHEME WITH VARIATIONS — LOCATION OF THE FUEL EN ROUTE ALTERNATE AERODROME TO REDUCE CONTINGENCY FUEL TO 3 %

The fuel en route alternate (fuel ERA) aerodrome should be located within a circle with a radius equal to 20 % of the total flight plan distance; the centre of this circle lies on the planned route at a distance from the destination aerodrome equal to 25 % of the total flight plan distance, or at least 20 % of the total flight plan distance plus 50 NM, whichever is greater. All distances should be calculated in still‑air conditions (see Figure 1). The fuel ERA aerodrome should be nominated in the operational flight plan.

Figure 1 — Location of the fuel ERA aerodrome to reduce contingency fuel to 3 %

Details

Source-Title: AMC7 CAT.OP.MPA.181 Fuel/energy scheme -- fuel/energy planning and in-flight re-planning policy -- aeroplanes View latest amendments

Erulesid: ERULES-1963177438-19407 Compare versions

Domain: Air operations

Applicabilitydate: 30 October, 2022

Entryintoforcedate: 26 March, 2022

Regulatorysource: ED Decision 2022/005/R Navigate

Regulatorysubject: Part-CAT

Typeofcontent: AMC to IR (Acceptable means of compliance to implementing rule)

Parentir: CAT.OP.MPA.181 Fuel/energy scheme - fuel/energy planning and in-flight re-planning policy - aeroplanes

Origin: EASA

Category: EAR