§29.1305 Powerplant instruments

The following are the required powerplant instruments: (a) For each rotorcraft: (1) A carburettor air temperature indicator for each reciprocating engine; (2) A cylinder head temperature indicator for each air-cooled reciprocating engine, and a coolant temperature indicator for each liquid-cooled reciprocating engine; (3) A fuel quantity indicator for each fuel tank; (4) A low-fuel warning device for each fuel tank which feeds an engine. This device must: (i) Provide a warning to the crew when approximately 10 minutes of usable fuel remains in the tank; and (ii) Be independent of the normal fuel quantity indicating system or be designed and constructed so as to meet the minimum safety objectives compatible with the most severe hazard induced by the combination of any failures of the fuel quantity indicator device and the low-fuel level warning device. (5) A means to indicate the manifold pressure for each reciprocating engine of the altitude type; (6) An oil pressure indicator for each pressure-lubricated gearbox; (7) An oil pressure warning device for each pressure-lubricated gearbox to indicate when the oil pressure falls below a safe value; (8) An oil quantity indicator for each oil tank and each rotor drive gearbox, if lubricant is self-contained; (9) An oil temperature indicator for each engine; (10) An oil temperature warning device to indicate unsafe oil temperatures in each main rotor drive gearbox, including gearboxes necessary for rotor phasing; (11) A means to indicate the gas temperature for each turbine engine; (12) A means to indicate the gas producer speed for each turbine engine; (13) A tachometer for each engine that, if combined with the applicable instrument required by sub-paragraph (a)(14), indicates rotor rpm during autorotation; (14) At least one tachometer to indicate, as applicable: (i) The rpm of the single main rotor; (ii) The common rpm of any main rotors whose speeds cannot vary appreciably with respect to each other; and (iii) The rpm of each main rotor whose speed can vary appreciably with respect to that of another main rotor; (15) A free power turbine tachometer for each turbine engine; (16) A means, for each turbine engine, to indicate power for that engine; (17) For each turbine engine, an indicator to indicate the functioning of the power plant ice protection system; (18) An indicator for the fuel filter required by CS 29.997 to indicate the occurrence of contamination of the filter to the degree established in compliance with CS 29.955; (19) For each turbine engine, a warning means for the oil strainer or filter required by CS 29.1019, if it has no bypass, to warn the pilot of the occurrence of contamination of the strainer or filter before it reaches the capacity established in accordance with CS 29.1019(a)(2); (20) An indicator to indicate the functioning of any selectable or controllable heater used to prevent ice clogging of fuel system components; (21) An individual fuel pressure indicator for each engine, unless the fuel system which supplies that engine does not employ any pumps, filters, or other components subject to degradation or failure which may adversely affect fuel pressure at the engine; (22) A means to indicate to the flight crew the failure of any fuel pump installed to show compliance with CS 29.955; (23) Warning or caution devices to signal to the flight crew when ferromagnetic particles are detected by the chip detection system required by CS 29.1337(e); and (24) For auxiliary power units, an individual indicator, warning or caution device, or other means to advise the flight crew that limits are being exceeded, if exceeding these limits can be hazardous, for: (i) Gas temperature; (ii) Oil pressure; and (iii) Rotor speed. (25) For rotorcraft for which a 30-second/2-minute OEI power rating is requested, a means must be provided to alert the pilot when the engine is at the 30-second and 2-minute OEI power levels, when the event begins, and when the time interval expires. (26) For each turbine engine utilising 30-second/2-minute OEI power, a device or system must be provided for use by ground personnel which: (i) Automatically records each usage and duration of power at the 30-second and 2- minute OEI levels; (ii) Permits retrieval of the recorded data; (iii) Can be reset only by ground maintenance personnel; and (iv) Has a means to verify proper operation of the system or device. (27) For rotorcraft for which a 30-minute power rating is claimed, a means must be provided to alert the pilot when the engines are at the 30-minute power rating levels, when the event begins, when the time interval expires and, if a cumulative limit in one flight exists, when the cumulative time in one flight is reached. (b) For Category A rotorcraft: (1) An individual oil pressure indicator for each engine, and either an oil pressure warning for each engine or a master warning device for all engines with means for isolating the individual warning circuit from the master warning device; (2) An independent fuel pressure warning device for each engine or a master warning device for all engines with provision for isolating the individual warning device from the master warning device; (3) Fire warning indicators; and (4) When the OEI Training Mode is prescribed, a means must be provided to indicate to the pilot the simulation of an engine failure, the annunciation of that simulation, and a representation of the OEI power being provided. (c) For Category B rotorcraft: (1) An individual oil pressure indicator for each engine; and (2) Fire warning indicators, when fire detection is required.