When planning a driftdown procedure for obstacle clearance, what adjustment must be made to the scheduled en-route one-engine-inoperative descent data?

The scheduled en-route OEI descent data must be increased by 0.5% gradient.

What does the 300 ft per minute rate of climb altitude represent in the context of en-route operations for multi-engined aeroplanes?

It represents the maximum altitude from which the driftdown procedure can be planned to start, not a restriction on the maximum cruising altitude.

GM1 CAT.POL.A.315 En-route - multi-engined aeroplanes

Q: What is the significance of the altitude where the rate of climb equals 300 feet per minute for a multi-engined aeroplane during en-route operations?

It is not a restriction on the maximum cruising altitude at which the aeroplane can fly in practice; it is merely the maximum altitude from which the driftdown procedure can be planned to start.

Q: Is the altitude where the rate of climb equals 300 ft/min a hard limit on the maximum cruising altitude for a multi-engined aeroplane?

No, it is not a restriction on the maximum cruising altitude at which the aeroplane can fly in practice; it is merely the maximum altitude from which the driftdown procedure can be planned to start.

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GM1 CAT.POL.A.315 En-route – multi-engined aeroplanes

ED Decision 2014/015/R

CRUISING ALTITUDE

(a) The altitude at which the rate of climb equals 300 ft per minute is not a restriction on the maximum cruising altitude at which the aeroplane can fly in practice, it is merely the maximum altitude from which the driftdown procedure can be planned to start.

(b) Aeroplanes may be planned to clear en-route obstacles assuming a driftdown procedure, having first increased the scheduled en-route OEI descent data by 0.5 % gradient.

Details

Source-Title: GM1 CAT.POL.A.315 En-route - multi-engined aeroplanes View latest amendments

Erulesid: ERULES-1963177438-12614 Compare versions

Domain: Air operations

Applicabilitydate: 1 July, 2014

Entryintoforcedate: 1 July, 2014

Regulatorysource: ED Decision 2014/015/R Navigate

Regulatorysubject: Part-CAT

Typeofcontent: GM to IR (Guidance material to implementing rule)

Parentir: CAT.POL.A.315 En-route - multi-engined aeroplanes

Origin: EASA

Category: EAR