Section 29.1519

14 CFR Ch. I (1-1-19 Edition)

variation with forward speed must be
established, together with any other
pertinent information, such as the kind
of landing surface.
[Amdt. 29-21, 48 FR 4391, Jan. 31, 1983]

spaschal on DSK3GDR082PROD with CFR

Section 29.1519 Weight and center of gravity.
The weight and center of gravity limitations determined under SectionSection 29.25 and
29.27, respectively, must be established
as operating limitations.
Section 29.1521 Powerplant limitations.
(a) General. The powerplant limitations prescribed in this section must be
established so that they do not exceed
the corresponding limits for which the
engines are type certificated.
(b) Takeoff operation. The powerplant
takeoff operation must be limited by - 
(1) The maximum rotational speed,
which may not be greater than - 
(i) The maximum value determined
by the rotor design; or
(ii) The maximum value shown during the type tests;
(2) The maximum allowable manifold
pressure (for reciprocating engines);
(3) The maximum allowable turbine
inlet or turbine outlet gas temperature
(for turbine engines);
(4) The maximum allowable power or
torque for each engine, considering the
power input limitations of the transmission with all engines operating;
(5) The maximum allowable power or
torque for each engine considering the
power input limitations of the transmission with one engine inoperative;
(6) The time limit for the use of the
power corresponding to the limitations
established
in
paragraphs
(b)(1)
through (5) of this section; and
(7) If the time limit established in
paragraph (b)(6) of this section exceeds
2 minutes - 
(i) The maximum allowable cylinder
head or coolant outlet temperature (for
reciprocating engines); and
(ii) The maximum allowable engine
and transmission oil temperatures.
(c) Continuous operation. The continuous operation must be limited by - 
(1) The maximum rotational speed,
which may not be greater than - 
(i) The maximum value determined
by the rotor design; or
(ii) The maximum value shown during the type tests;

(2) The minimum rotational speed
shown under the rotor speed requirements in Section 29.1509(c).
(3) The maximum allowable manifold
pressure (for reciprocating engines);
(4) The maximum allowable turbine
inlet or turbine outlet gas temperature
(for turbine engines);
(5) The maximum allowable power or
torque for each engine, considering the
power input limitations of the transmission with all engines operating;
(6) The maximum allowable power or
torque for each engine, considering the
power input limitations of the transmission with one engine inoperative;
and
(7) The maximum allowable temperatures for - 
(i) The cylinder head or coolant outlet (for reciprocating engines);
(ii) The engine oil; and
(iii) The transmission oil.
(d) Fuel grade or designation. The minimum fuel grade (for reciprocating engines) or fuel designation (for turbine
engines) must be established so that it
is not less than that required for the
operation of the engines within the
limitations in paragraphs (b) and (c) of
this section.
(e) Ambient temperature. Ambient
temperature
limitations
(including
limitations for winterization installations if applicable) must be established
as the maximum ambient atmospheric
temperature at which compliance with
the cooling provisions of SectionSection 29.1041
through 29.1049 is shown.
(f) Two and one-half minute OEI power
operation. Unless otherwise authorized,
the use of 21-2-minute OEI power must
be limited to engine failure operation
of multiengine, turbine-powered rotorcraft for not longer than 21-2 minutes
for any period in which that power is
used. The use of 21-2-minute OEI power
must also be limited by - 
(1) The maximum rotational speed,
which may not be greater than - 
(i) The maximum value determined
by the rotor design; or
(ii) The maximum value shown during the type tests;
(2) The maximum allowable gas temperature;
(3) The maximum allowable torque;
and

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