Powerplant instruments.

CFR · 2024-01-01 · US · Title 14

(a) (2) Each line carrying flammable fluids under pressure must— (i) Have restricting orifices or other safety devices at the source of pressure to prevent the escape of excessive fluid if the line fails; and (ii) Be installed and located so that the escape of fluids would not create a hazard. (3) Each powerplant and auxiliary power unit instrument that utilizes flammable fluids must be installed and located so that the escape of fluid would not create a hazard. (b) (1) Each fuel quantity indicator must be calibrated to read “zero” during level flight when the quantity of fuel remaining in the tank is equal to the unusable fuel supply determined under § 25.959; (2) Tanks with interconnected outlets and airspaces may be treated as one tank and need not have separate indicators; and (3) Each exposed sight gauge, used as a fuel quantity indicator, must be protected against damage. (c) (d) (e) (f) (1) If necessary for the maintenance of proper fuel delivery pressure, there must be a connection to transmit the carburetor air intake static pressure to the proper pump relief valve connection; and (2) If a connection is required under paragraph (f)(1) of this section, the gauge balance lines must be independently connected to the carburetor inlet pressure to avoid erroneous readings.

official document · source cfr-2024 · id 14:§ 25.1337