Powerplant instruments.

CFR · 2024-01-01 · US · Title 14

The following are the required powerplant instruments: (a) A carburetor air temperature indicator, for each engine having a preheater that can provide a heat rise in excess of 60 °F. (b) A cylinder head temperature indicator, for each— (1) Air cooled engine; (2) Rotorcraft with cooling shutters; and (3) Rotorcraft for which compliance with § 27.1043 is shown in any condition other than the most critical flight condition with respect to cooling. (c) A fuel pressure indicator, for each pump-fed engine. (d) A fuel quantity indicator, for each fuel tank. (e) A means to indicate manifold pressure for each altitude engine. (f) An oil temperature warning device to indicate when the temperature exceeds a safe value in each main rotor drive gearbox (including any gearboxes essential to rotor phasing) having an oil system independent of the engine oil system. (g) An oil pressure warning device to indicate when the pressure falls below a safe value in each pressure-lubricated main rotor drive gearbox (including any gearboxes essential to rotor phasing) having an oil system independent of the engine oil system. (h) An oil pressure indicator for each engine. (i) An oil quantity indicator for each oil tank. (j) An oil temperature indicator for each engine. (k) A means to indicate the r.p.m. of each engine and at least one tachometer, as applicable, for: (1) The r.p.m. of the single main rotor; (2) The common r.p.m. of any main rotors whose speeds cannot vary appreciably with respect to eac

official document · source cfr-2024 · id 14:§ 27.1305