FAA Federal Aviation Regulations (FARS, 14 CFR)

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.

[Amdt. 29-26, 53 FR 34215, Sept. 2, 1988]