Single Engine Operations Single engine operations 1 Engine
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Single Engine Operations Single engine operations 1
Engine Failure • Standard Strategy • Obstacle Strategy Single engine operations 2
Standard Strategy • In case of engine failure and if no constraining obstacle is found on the route, the AIRBUS ‘Standard strategy’ will be adopted. • It ensures MAX range at the expense of rate of descent and descent ceiling Single engine operations 3
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In case of engine failure the progress page of FMS presents the LRC ceiling as the REC MAX altitude FL 165 Single engine operations 5
FL 166 Single engine operations 6
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Ex: Descent from FL 330 to FL 160 MCT Thrust GW 68 t Result: Fuel 1347 -433=914 Kg Time 38 -12=26 min Dist 253 -72=181 Nm Single engine operations 8
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Obstacle Strategy • If constraining obstacles are met on the route after an engine failure, the ‘AIRBUS Obstacle strategy’ (Drift down) will be adopted in order to maintain the highest possible level. • It ensures min rate of descent and max E/O descent ceiling at the expense of range. Single engine operations 11
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359 234 66. 5 21. 7 22000 Single engine operations 13
359 234 66. 5 21. 7 22000 Single engine operations 14
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Example • Determination of LRC ceiling • Determination of Drift Down Ceiling • Conclusion Single engine operations 16
Example • DATA – SAT: -36ºC – GW 68 000 kg – FL 330 – MORA : 18 300 ft Single engine operations 17
• DATA – – SAT: -36 GW 68 000 kg FL 330 MORA 18300 ft DISA=+15 LRC Ceiling 16600 ft As LRC ceiling is below the MORA, the Standard strategy can not be adopted. Single engine operations 18
• DATA – SAT: -36 – GW 68 000 kg – FL 330 – MORA 18300 ft DISA=+15 LRC Ceiling 16600 ft As the Drift Down ceiling (19 800 ft) is above the MORA, the Drift Down Procedure is adopted. 409 234 75. 5 25. 2 19800 Single engine operations 19
Procedure • Set MCT on the remaining engine • Decelerate to green dot speed: 234 kt Then Descend to level off • Set, on FCU green dot speed and pull • A/THR : OFF • Set on FCU Drift Down Ceiling and pull. Single engine operations 20