496 

14 CFR Ch. I (1–1–14 Edition) 

§ 25.1305 

(2) A machmeter is required at each 

pilot station for airplanes with com-
pressibility limitations not otherwise 
indicated to the pilot by the airspeed 
indicating system required under para-
graph (b)(1) of this section. 

[Amdt. 25–23, 35 FR 5678, Apr. 8, 1970, as 
amended by Amdt. 25–24, 35 FR 7108, May 6, 
1970; Amdt. 25–38, 41 FR 55467, Dec. 20, 1976; 
Amdt. 25–90, 62 FR 13253, Mar. 19, 1997] 

§ 25.1305

Powerplant instruments. 

The following are required power-

plant instruments: 

(a) 

For all airplanes. (1) A fuel pres-

sure warning means for each engine, or 
a master warning means for all engines 
with provision for isolating the indi-
vidual warning means from the master 
warning means. 

(2) A fuel quantity indicator for each 

fuel tank. 

(3) An oil quantity indicator for each 

oil tank. 

(4) An oil pressure indicator for each 

independent pressure oil system of 
each engine. 

(5) An oil pressure warning means for 

each engine, or a master warning 
means for all engines with provision 
for isolating the individual warning 
means from the master warning means. 

(6) An oil temperature indicator for 

each engine. 

(7) Fire-warning devices that provide 

visual and audible warning. 

(8) An augmentation liquid quantity 

indicator (appropriate for the manner 
in which the liquid is to be used in op-
eration) for each tank. 

(b) 

For reciprocating engine-powered 

airplanes. In addition to the powerplant 
instruments required by paragraph (a) 
of this section, the following power-
plant instruments are required: 

(1) A carburetor air temperature indi-

cator for each engine. 

(2) A cylinder head temperature indi-

cator for each air-cooled engine. 

(3) A manifold pressure indicator for 

each engine. 

(4) A fuel pressure indicator (to indi-

cate the pressure at which the fuel is 
supplied) for each engine. 

(5) A fuel flowmeter, or fuel mixture 

indicator, for each engine without an 
automatic altitude mixture control. 

(6) A tachometer for each engine. 

(7) A device that indicates, to the 

flight crew (during flight), any change 
in the power output, for each engine 
with— 

(i) An automatic propeller feathering 

system, whose operation is initiated by 
a power output measuring system; or 

(ii) A total engine piston displace-

ment of 2,000 cubic inches or more. 

(8) A means to indicate to the pilot 

when the propeller is in reverse pitch, 
for each reversing propeller. 

(c) 

For turbine engine-powered air-

planes.  In addition to the powerplant 
instruments required by paragraph (a) 
of this section, the following power-
plant instruments are required: 

(1) A gas temperature indicator for 

each engine. 

(2) A fuel flowmeter indicator for 

each engine. 

(3) A tachometer (to indicate the 

speed of the rotors with established 
limiting speeds) for each engine. 

(4) A means to indicate, to the flight 

crew, the operation of each engine 
starter that can be operated continu-
ously but that is neither designed for 
continuous operation nor designed to 
prevent hazard if it failed. 

(5) An indicator to indicate the func-

tioning of the powerplant ice protec-
tion system for each engine. 

(6) An indicator for the fuel strainer 

or filter required by § 25.997 to indicate 
the occurrence of contamination of the 
strainer or filter before it reaches the 
capacity established in accordance 
with § 25.997(d). 

(7) A warning means for the oil 

strainer or filter required by § 25.1019, if 
it has no bypass, to warn the pilot of 
the occurrence of contamination of the 
strainer or filter screen before it 
reaches the capacity established in ac-
cordance with § 25.1019(a)(2). 

(8) An indicator to indicate the prop-

er functioning of any heater used to 
prevent ice clogging of fuel system 
components. 

(d) 

For turbojet engine powered air-

planes.  In addition to the powerplant 
instruments required by paragraphs (a) 
and (c) of this section, the following 
powerplant instruments are required: 

(1) An indicator to indicate thrust, or 

a parameter that is directly related to 
thrust, to the pilot. The indication 

VerDate Mar<15>2010 

10:12 Mar 18, 2014

Jkt 232046

PO 00000

Frm 00506

Fmt 8010

Sfmt 8010

Y:\SGML\232046.XXX

232046

pmangrum on DSK3VPTVN1PROD with CFR