(a) Unless specifically approved by the Authority in accordance with OPS 1.246 (a) (ETOPS approval), an operator shall not operate a two-engined aeroplane over a route which contains a point further from an adequate aerodrome (under standard conditions in still air) than, in the case of:
- 1. Performance Class A aeroplanes with either:
(i) a maximum approved passenger seating configuration of 20 or more; or
(ii) a maximum take-off mass of 45 360 kg or more,
the distance flown in 60 minutes at the one-engine-inoperative cruise speed determined in accordance with sub- paragraph (b) below;
2. Performance Class A aeroplanes with:
(i) a maximum approved passenger seating configuration of 19 or less; and
(ii) a maximum take-off mass less than 45 360 kg,
the distance flown in 120 minutes or, if approved by the Authority, up to 180 minutes for turbo-jet aeroplanes, at the one-engine-inoperative cruise speed determined in accordance with subparagraph (b) below;
3. Performance Class B or C aeroplanes:
(i) The distance flown in 120 minutes at the one-engine-inoperative cruise speed determined in accordance with subparagraph (b) below; or
(ii) 300 nautical miles, whichever is less.
(b) An operator shall determine a speed for the calculation of the maximum distance to an adequate aerodrome for each two-engined aeroplane type or variant operated, not exceeding VMO, based upon the true airspeed that the aeroplane can maintain with one-engine-inoperative.
(c) An operator must ensure that the following data, specific to each type or variant, is included in the Operations Manual:
1. the one-engine-inoperative cruise speed determined in accordance with subparagraph (b) above; and
2. the maximum distance from an adequate aerodrome determined in accordance with subparagraphs (a) and (b) above.
Note: The speeds specified above are only intended to be used for establishing the maximum distance from an adequate aerodrome.
See also:
ETOPS (Extended range operations for two engine aeroplanes)