14 CFR §29.361
The limit engine torque may not be less than the following:
- (a)For turbine engines, the highest of—
- (1)The mean torque for maximum continuous power multiplied by 1.25;
- (2)The torque required by § 29.923;
- (3)The torque required by § 29.927; or
- (4)The torque imposed by sudden engine stoppage due to malfunction or structural failure (such as compressor jamming).
- (b)For reciprocating engines, the mean torque for maximum continuous power multiplied by—
- (1)1.33, for engines with five or more cylinders; and
- (2)Two, three, and four, for engines with four, three, and two cylinders, respectively.