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Elodie Roux. Septembre 2003
Subpart F : Equipment
(1)
Laboratory dry air or simulated icing tests, or a combination of both, of the components or models of the components.
(2)
Flight dry air tests of the ice protection system as a whole, or its individual components.
(3)
Flight tests of the rotorcraft or its components in measured simulated icing conditions.
(d)
Theiceprotectionprovisions ofthis section are consideredtobe applicableprimarily to the airframe. Powerplant installation requirements are contained in Subpart E of this Part.
(e)
A means must be identi.ed or provided for determining the formation of ice on critical parts of the rotorcraft. Unless otherwise restricted, the means must be available for nighttime as well as daytime operation. The rotorcraft .ight manual mustdescribethe means ofdeterminingiceformation and must containinformation necessary for safe operation of the rotorcraft in icing conditions.]
Amdt. 29-21, E.. 3/2/83
76.6 Miscellaneous Equipment
FAR 29.1431 : Electronic equipment.
(a)
Radio communication and navigation equipment installations must be free from hazards in themselves, in their method of operation, and in their e.ects on other components, under any critical environmental conditions.
(b)
Radio communication and navigation equipment, controls, and wiring must be ins-talled so that operation of any one unit or system of units will not adversely a.ect the simultaneous operation of any other radio or electronic unit, or system of units, required by this chapter.
FAR 29.1433 : Vacuum systems.
(a)
There must be means, in addition to the normal pressure relief, to automatically relieve the pressure in the discharge lines from the vacuum air pump when the delivery temperature of the air becomes unsafe.
(b)
Eachvacuumairsystemlineand.tting onthedischargesideofthepump that might contain .ammable vapors or .uids must meet the requirements of Sec. 29.1183 if they are in a designated .re zone.
(c)
Other vacuum air system components in designated .re zones must be at least .re resistant.
FAR 29.1435 : Hydraulic systems.
(a)
Design. Each hydraulic system must be designed as follows :
(1)
Each element of the hydraulic system must be designed to withstand, without detrimental,permanentdeformation anystructuralloadsthat maybeimposed simultaneously with the maximum operating hydraulic loads.
(2)
Each element of the hydraulic system mustbe designed to withstandpressures su.cientlygreater than thoseprescribedinparagraph(b) of this section to show that the system will not rupture under service conditions.
(3)
There must be means to indicate the pressure in each main hydraulic power system.
(4)
Theremustbe meansto ensurethat nopressureinanypart of the systemwill exceed a safelimit abovethe maximum operatingpressureof the system, and to prevent excessive pressures resulting from any .uid volumetric change in lineslikely to remain closedlong enoughfor such a changetotakeplace.The possibility of detrimental transient (surge) pressures during operation must be considered.
(5)
Each hydraulic line, .tting, and component must be installed and supported toprevent excessive vibration and to withstand inertia loads.Each element of the installation must be protected from abrasion, corrosion, and mechanical damage.
(6)
Means for providing .exibility must be used to connect points, in a hydraulic .uid line, between which relative motion or di.erential vibration exists.
(b)
Tests.Each element of the system mustbe tested to aproofpressure of1.5 times the maximum pressure to which that element will be subjected in normal operation, without failure, malfunction, ordetrimentaldeformation of anypart of the system.
