CS-VLA 1337 Powerplant instruments
ED Decision 2003/18/RM
(a) Instruments and instrument lines
(1) Each powerplant instrument line must meet the requirements of CS-VLA 993.
(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 instrument that utilises flammable fluids must be installed and located so that the escape of fluid would not create a hazard.
(b) Fuel quantity indicator. There must be a means to indicate to the pilot the quantity of fuel in each tank during flight. In addition -
(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 CS-VLA 959;
(2) Each exposed sight gauge used as a fuel quantity indicator must be protected against damage;
(3) Each sight gauge that forms a trap in which water can collect and freeze must have means to allow drainage on the ground;
(4) Tanks with interconnected outlets and airspaces may be considered as one tank and need not have separate indicators.
(c) Fuel flowmeter system. If a fuel flowmeter system is installed, each metering component must have a means to by-pass the fuel supply if malfunctioning of that component severely restricts fuel flow.
Summary: EASA aviation regulations for Very Light Aeroplanes (VLA) mandate specific safety measures for powerplant instruments, fuel lines, and fuel quantity indicators. Fuel lines must prevent excessive fluid escape, and fuel instruments must avoid hazards. Fuel quantity indicators must accurately display usable fuel, and fuel flowmeter systems require bypass mechanisms.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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