CS 31TGB.71 Function and installation
ED Decision 2013/011/R
(a) Equipment is:
(1) of a kind and design appropriate to its intended function;
(2) labelled as to its identification, function, or operating limitations, or any applicable combination of these factors; and
(3) installed according to limitations specified for that equipment.
(b) Instruments and other equipment do not in themselves, or by their effect upon the balloon, constitute a hazard to safe operation.
(c) The following instruments are installed if required to monitor the operating limitations:
(1) An envelope pressure gauge which displays the limits of permissible internal pressure. The operator is warned by an unambiguous signal if the limit of airborne operating pressure is exceeded.
(2) A temperature measuring device mounted at a point of the envelope that provides a measurement of the operational limitation.
(3) A wind velocity measuring device mounted at the most appropriate point of the envelope.
(4) A load cell at the most appropriate place in order to monitor the tensile force in the tether cable in service.
(5) Device(s) to provide the operational or design limitations information to the operator.
(d) Systems and equipment that need to function properly for safe operation are identified in the operational instructions.