---
title: "CAT.POL.A.315 En-route – multi-engined aeroplanes — Part-CAT · Avioverse"
description: "The aeroplane, in the meteorological conditions expected for the flight and in the event of the failure of one engine, with the remaining engines…"
url: "https://avioverse.aero/regulations/easa/air-ops/part-cat/subpart-c/cat-pol-a-315"
---

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

ANNEX IV (Part-CAT) · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026

Official sources: [EASA Easy Access Rules (opens in a new tab)](https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-air-operations) · [EUR-Lex 2012/965 (opens in a new tab)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32012R0965)

IR Implementing rule

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

(a) The [aeroplane](https://avioverse.aero/glossary/easa/aeroplane), in the meteorological conditions expected for the flight and in the event of the failure of one engine, with the remaining engines operating within the maximum continuous power conditions specified, shall be capable of continuing flight at or above the relevant minimum altitudes for safe flight stated in the operations manual to a point of 1 000 ft above an aerodrome at which the performance requirements can be met.

(b) It shall be assumed that, at the point of engine failure:

(1) the aeroplane is not flying at an altitude exceeding that at which the rate of climb equals 300 ft per minute with all engines operating within the maximum continuous power conditions specified; and

(2) the en-route gradient with OEI shall be the gross gradient of descent or climb, as appropriate, respectively increased by a gradient of 0,5 %, or decreased by a gradient of 0,5 %.

IR · CAT.POL.A.315 — Regulation (EU) No 965/2012 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

GM Guidance material

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

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](https://avioverse.aero/glossary/easa/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.

GM · GM1 CAT.POL.A.315 — Regulation (EU) No 965/2012 · ED Decision 2014/015/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

[All rules in SUBPART C: AIRCRAFT PERFORMANCE AND OPERATING LIMITATIONS](https://avioverse.aero/regulations/easa/air-ops/part-cat/subpart-c)

Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 2 Nov 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.