(ii)
Inspection intervals and methods must be established as necessary to ensurethatfailures aredetectedpriorto residual strength conditionsbeing reached.
(iii) If signi.cant changes in structural sti.ness or geometry, or both, follow from a structural failure or partial failure, the e.ect on .aw tolerance must be further investigated.
(3)
Safe-life evaluation. It must be shown that the structure is able to withstand repeated loads of variable magnitude without detectable cracks for the follo-wing time intervals–
(i)
Life of the rotorcraft; or
(ii)
Within a replacement time furnished under Section A29.4 of Appendix A to this part.]
Amdt. 29-28, E.. 11/27/89
′
Elodie Roux. Septembre 2003
Subpart C : Strength Requirements
Chapitre 74
Subpart D : Design and Construction
Sommaire
74.1General ............................... 960 FAR29.601:Design.. . . . . . . . . . . . . . . . . . . . . . . 960 FAR29.602:[Criticalparts.] .................. 960 FAR29.603:Materials. ..................... 960 FAR29.605:Fabricationmethods. . . . . . . . . . . . . . . . 960 FAR29.607:Fasteners. ..................... 960 FAR29.609:Protectionof structure. . . . . . . . . . . . . . 961 FAR29.610:[Lightning and staticelectricityprotection.] . . 961 FAR29.611:Inspectionprovisions.. . . . . . . . . . . . . . . 961 FAR 29.613 : Material strength properties and design values. 962 FAR29.619:Specialfactors. .................. 962 FAR29.621:Castingfactors. .................. 963 FAR29.623:Bearingfactors. . . . . . . . . . . . . . . . . . . 964 FAR29.625:Fittingfactors. .................. 964 FAR29.629:[Flutteranddivergence.] . . . . . . . . . . . . 964 FAR29.631:[Bird strike.] ................... 965
74.2Rotors ................................ 965 FAR 29.653 : Pressure venting and drainage of rotor blades. 965 FAR29.659:Massbalance. .................. 965 FAR29.661:Rotorbladeclearance. . . . . . . . . . . . . . . 965 FAR 29.663 : Ground resonance prevention means. . . . . . 965
74.3ControlSystems .......................... 966 FAR29.671:General. ...................... 966 FAR29.672 :[Stability augmentation, automatic, andpower-operated systems.] .................. 966 FAR29.673:[Primary .ightcontrols.] . . . . . . . . . . . . 966 FAR29.674:[Interconnected controls.] . . . . . . . . . . . . 967 FAR29.675:Stops. ....................... 967 FAR29.679:Control systemlocks. . . . . . . . . . . . . . . 967 FAR29.681:Limitload statictests. . . . . . . . . . . . . . 967
957
Subpart D : Design and Construction
FAR29.683:Operationtests. ................. 968 FAR29.685:Control systemdetails. . . . . . . . . . . . . . 968 FAR29.687:Spring devices. .................. 969 FAR 29.691 : Autorotation control mechanism. . . . . . . . . 969 FAR 29.695 : Power boost and power-operated control system. 969
74.4LandingGear. . . . . . . . . . . . . . . . . . . . . . . . . . . . 969
FAR29.723:Shock absorptiontests. . . . . . . . . . . . . . 969 FAR29.725:Limitdrop test. ................. 969 FAR 29.727 : Reserve energy absorption drop test. . . . . . . 970 FAR29.729:Retracting mechanism. . . . . . . . . . . . . . 971 FAR29.731:Wheels. ...................... 971 FAR29.733:Tires. ....................... 971 FAR29.735:Brakes. ...................... 972 FAR29.737:Skis. ........................ 972 FAR29.751:Main.oatbuoyancy. . . . . . . . . . . . . . . 972
74.5FloatsandHulls .......................... 973
FAR29.753:Main.oatdesign. . . . . . . . . . . . . . . . . 973 FAR29.755:Hullbuoyancy. .................. 973 FAR29.757:[Hull and auxiliary.oatstrength.] . . . . . . . 973
74.6 Personnel and Cargo Accommodations . . . . . . . . . . . . 973
FAR29.771:Pilotcompartment. . . . . . . . . . . . . . . . 973 FAR29.773:Pilotcompartmentview. . . . . . . . . . . . . 974 FAR29.775:Windshield and windows. . . . . . . . . . . . . 974 FAR29.777:Cockpitcontrols. ................. 974 FAR29.779:[Motionand e.ectof cockpitcontrols.] . . . . 974 FAR29.783:Doors. ....................... 975 FAR 29.785 : Seats, berths, [litters,] safety belts, and har-nesses. ......................... 976 FAR 29.787 : Cargo and baggage compartments. . . . . . . . 977 FAR29.801:[Ditching.] .................... 977 FAR29.803:Emergency evacuation. . . . . . . . . . . . . . 978 FAR 29.805 : Flight crew emergency exits. . . . . . . . . . . 979 FAR 29.807 : Passenger emergency exits. . . . . . . . . . . . 979 FAR 29.809 : Emergency exit arrangement. . . . . . . . . . . 980 FAR29.811:Emergency exitmarking. . . . . . . . . . . . . 981 FAR29.812:[Emergencylighting.] . . . . . . . . . . . . . . 983 FAR29.813:Emergency exitaccess. . . . . . . . . . . . . . 984 FAR29.815:Mainaislewidth. ................ 984 FAR29.831:Ventilation. .................... 984 FAR29.833:Heaters. ...................... 985
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