ED Decision 2003/13/RM
(a) The engine mount and its supporting structure must be designed for the effects of:
(1) the limit torque corresponding to take-off power and propeller speed, acting simultaneously with 75% of the limit loads from flight condition A of CS 22.333(b);
(2) the limit torque corresponding to the maximum continuous power and propeller speed, acting simultaneously with the limit loads from flight condition A of CS 22.333(b).
(b) For reciprocating engines the limit torque to be accounted for in CS 22.361(a) is obtained by multiplying the mean torque by one of the following factors:
(1) 1.33 for engines with 5 or more cylinders;
(2) 2 for engines with 4 cylinders;
(3) 3 for engines with 3 cylinders;
(4) 4 for engines with 2 cylinders.
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