31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

5.4 The local attachment factor of 1.33 applies, in addition to the relevantprescribed acceleration forces, to door hinges, catches and restraint meanswhich form part of the equipment structure, and to structure adjacent to therestraint means provided by the galley or similar stowage.5.5 Doors, including their hinges and catches, of catering boxes, etc., must be ofstrength compatible with the placarded contents weight, unless use of the boxis restricted to stowage in completely enclosed galley, or similarcompartments. This also applies to the doors of catering trolleys, but in theircase, the total structure of the trolley must also be shown to be in compliancewith the strength requirements taking into account means of retention of thetrolley in the aircraft.5.6 The design of the trolley should be such that the loads imposed on the aircraftfloor, do not exceed any floor loading limitations.5.7 (a) Duplicated catches must be provided for means of retention for itemswhich are habitually operated during flight, to allow for failure of oneof the catches.(b)Where retention of a unit into its stowage compartment is by turn catch,operating the catch should not release more than one unit.5.8 Where catering trolleys have a facility for the collection of waste, they shallcomply with the fire containment requirements of BCAR Chapter D4-3paragraph 6.4.5.9 Where the basis of type certification of the aircraft requires the provision ofmeans of trolley restraint, in the passenger cabin, capable of withstanding theloads associated with the flight cases, the trolleys shall be provided withattachment means compatible with the anchorage points provided in theaircraft. Such methods of restraint should be engineered so that it can beused by one person and so that its use will be likely to occur by virtue of itssimplicity of operation.5.10 The trolleys must embody a brake system if they are to be removed from theirstowage in flight. In the absence of evidence justifying an equivalentminimum braking force then the braking mechanism must be qualified byloading the trolley to its maximum loaded weight and ensuring that thebraking mechanism holds the trolley on an incline plane of 7.5°.5.11 Trolleys shall carry placarded instructions:(a)(b)that they must be stored and secured during take-off, turbulent weatherand landing;that the gross weight of the unit, or the combined gross weight of theAN-99 P.330 May 2007