1、BRITISH STANDARD AEROSPACE SERIES BS M 90:1997 ISO12056:1996 Aircraft ground support equipment Self-propelled passenger stairs for large capacity aircraft Functional requirements ICS 49.090BSM90:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was
2、 published under the authority of the Standards Board and comes into effect on 15 January 1997 BSI 11-1998 The following BSI references relate to the work on this standard: Committee reference ACE/57 Draft for comment 93/717833 DC ISBN 0 580 26395 9 Committees responsible for this British Standard T
3、he preparation of this British Standard was entrusted to Technical Committee ACE/57, Aircraft cargo systems and ground equipment, upon which the following bodies were represented: Association of Webbing Load Restraint Equipment Manufacturers British Airways British Narrow Fabrics Association Civil A
4、viation Authority (Airworthiness Division) Health and Safety Executive Ministry of Defence Society of British Aerospace Companies Ltd. Society of Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No. Date CommentsBSM90:1997 BSI 11-1998 i Contents Page Committees responsib
5、le Inside front cover National foreword ii Introduction 1 1 Scope 1 2 Normative references 1 3 Structure and overall dimensions 1 4 Stairs flight 2 5 Platform 2 6 Handrails 2 7 Elevation and stability 3 8 Controls 3 9 Emergency 4 10 Options 4 Annex A (normative) Geometry criteria for stair flight de
6、sign 5 Annex B (informative) Bibliography 9 Figure A.1 Stair design data chart 7 Table 1 3 Table A.1 5 Table A.2 5 Table A.3 8 List of references Inside back coverBSM90:1997 ii BSI 11-1998 National foreword This British Standard has been prepared by Technical Committee ACE/57 and is identical with I
7、SO 12056:1996 Aircraft Self-propelled passenger stairs for large capacity aircraft Functional requirements, published by the International Organization for Standardization (ISO). The Technical Committee has reviewed the provisions of ISO7718:1984, to which normative reference is made in the text, an
8、d has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself
9、 confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard ISO 6966:1993 BS M 74:1994 Air cargo equipment. Basic requirements for aircraft loading equipment (Identical) ISO 7000:1989 BS 7324:1990 Guide to graphical symbols for use on equipment (I
10、dentical) ISO 11995:1996 BS M 89:1996 Aircraft ground support equipment Stability requirements for loading and servicing equipment (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1to10, an inside back cover and a back cover. This standa
11、rd has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.BSM90:1997 BSI 11-1998 1 Introduction Throughout this International Standard, the minimum essential criteria are identified by the use of the key
12、word “shall”. Recommended criteria are identified by the use of the key word “should”, and while not mandatory are considered to be of primary importance in providing serviceable, economical, and practical passenger stairs. Deviation from the recommended criteria should occur only after careful cons
13、ideration, extensive testing and thorough service evaluation have shown alternate methods to be satisfactory. 1 Scope 1.1 This International Standard specifies the functional, performance and safety requirements for self-propelled passenger boarding stairs intended for access to the cabin of all air
14、craft types commonly in service in international civil air transport with a cabin door sill height equal to or exceeding2,54m(100 in) over the ground. 1.2 The intent of this International Standard is not to specify equipment design, but rather to define minimum functional and performance requirement
15、s and highlight those criteria which are recognized as essential in the environment of international airports by aircraft and vehicle manufacturers as well as air-lines and handling agencies. 1.3 This International Standard shall be applied with due reference to national governmental regulations of
16、the country where the vehicle is to be operated. The main though not exclusive areas in which such national regulations may apply are: regulations concerning equipment for use by the public; stability and other safety requirements applicable to elevating equipment. 2 Normative references The followi
17、ng standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encour
18、aged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6966:1993, Aircraft Basic requirements for aircraft loading equipment. ISO 7000:1989, Graphical symbols
19、 for use on equipment Index and synopsis. ISO 7718:1984, Aircraft Connection of passenger loading bridge or transfer vehicle Interface requirements in the vicinity of main deck passenger doors. ISO 11995:1996, Aircraft Stability requirements for loading and servicing equipment. 3 Structure and overa
20、ll dimensions 3.1 The stairs should preferably be constructed on a standard automotive chassis of appropriate gross weight rating. 3.2 The stairs should consist of telescopic sections with an upper (main) platform and an intermediate platform, and provide a straight ascent/descent to/from the aircra
21、ft door. 3.3 The height of the upper platform shall be adjustable by increments of one full step within a range from 2,54m (100in) to 5,6m (220 in). 3.4 The dimensions, laden weight and other characteristics of the vehicle should meet all applicable government regulations for vehicles to be driven o
22、n public roadways, when in the fully retracted position. 3.5 The overall height in the fully retracted position shall not exceed 4m (158in). NOTE 1This requires that the optional canopy described in clause 10 d) be removable, if provided. 3.6 The overall width of the vehicle, with stabilizers retrac
23、ted, shall not exceed 2,5m (98in), or less if so required by locally applicable regulations. NOTE 2Overall height and width of the vehicle may be further restricted by public road regulations in certain countries. 3.7 The lowest point of the vehicles structure shall not be less than 200mm (8in) abov
24、e a horizontal ground. In addition, the vehicles underclearance shall allow without interference the transversing of two surfaces intersecting at an angle of 3 (5%) either in bridging or in cresting. 3.8 The overall swept turning radius of the vehicle in the fully extended position shall be less tha
25、n12,2m (40ft). 3.9 The cab or drivers position shall not project forward of the leading edge of the upper platform when in its fully retracted position. 3.10 The equipment shall meet the appropriate requirements of ISO6966.BSM90:1997 2 BSI 11-1998 4 Stairs flight 4.1 The stairs flight shall consist
26、of fixed risers and treads. The treads cover material shall be of non-skid/anti-slip quality, including when wet; permit easy elimination of water and snow; resist the catching of womens shoes heels. 4.2 The angle of incline, tread-riser ratio and riser dimensions of the stairs flight should meet th
27、e geometry criteria defined in annex A. 4.3 The stairs flight internal usable clear width shall be 1m (40in)min. 4.4 The stairs flight should include an intermediate platform of a minimum length equal to 3 treads. Any longer platform should have a length equal to that of the tread multiplied by an i
28、nteger. 4.5 The design load capacity shall be2200N(500lbf) per step and 6 600N (1 500lbf) for the intermediate platform. A safety factor of 3 : 1 should be applied to the design load in order to obtain the minimum required yield strength, unless a higher safety factor is required by local government
29、 regulations concerning equipment for use by the public (see 1.3). 4.6 Any hinged step that may be fitted at the bottom of the stair in order to meet the requirements of 3.7 shall have a riser of the same dimensions as those of the stairway. This step shall be counterbalanced for ease of handling. A
30、 self-engaging latch shall be provided to secure the step in the up position. 4.7 The stairs flight and intermediate platform shall have complete illumination, of non-glare quality and permitting no deep shadows which could present a hazard. 5 Platform 5.1 The upper (main) platform shall have minimu
31、m usable dimensions of 1,5m (60in) width and1,2m(48in) length. 5.2 The platform cover material shall be of non-skid/anti-slip quality, including when wet; permit easy elimination of water and snow; resist the catching of womens shoes heels. 5.3 The platform incline in any position should not be in e
32、xcess of 2 (3,5%), and shall not be in excess of 3 (5%) from the horizontal plane, while the vehicle is stabilized on a horizontal surface. 5.4 Both sides of the platform shall be fitted with full panels supporting the handrails specified in 6.1. The forward end of each side panel shall be covered b
33、y protective padding and have a geometry such that it can suit the fuselage contour of all aircraft types intended to be handled, while leaving a minimum gap. 5.5 In addition, unless the platform internal usable width is at least 2,3m (90in), the left-hand side panel together with its handrail shall
34、 be sliding or folding in order to allow opening and closing of the aircraft doors without obstruction. A positive and reliable means of latching the sliding or folding side panel at a variety of intermediate positions shall be provided. 5.6 In order to avoid any risk of damage to the aircraft while
35、 being serviced, the following precautions shall be taken. a) The leading edge of the platform shall be entirely covered by protective padding and compatible with ISO7718. b) The area directly below the platform shall be free from all components and/or obstructions within at least 300mm (12in) of th
36、e aircraft interface area. The platform thickness in this area shall be kept to a minimum. 5.7 The design load capacity of the platform shall be6 600N/m 2evenly distributed, and under any condition not less than 9 000N (2 000lbf). A safety factor of 3 : 1 should be applied to the design load in orde
37、r to obtain the minimum required yield strength, unless a higher safety factor is required by local government regulations concerning equipment for use by the public (see1.3). 5.8 The platform forward left-hand corner shall include a provision allowing for an unobstructed up and down movement of the
38、 open aircraft door while the stairs are in position. 5.9 The platform shall have complete illumination, of non-glare quality and permitting no deep shadows which could present a hazard. 6 Handrails 6.1 Handrails shall be provided on both sides of the stairway, the intermediate platform and the uppe
39、r platform. 6.2 Maximum continuity shall be maintained at all points between handrail segments. 6.3 The handrails shall include no projection or corners that could cause injury, and shall be easily replaceable and suitably finished to preclude the possibility of damaging or soiling passenger clothin
40、g.BSM90:1997 BSI 11-1998 3 6.4 The handrails should preferably be supported by a full panel, and shall include at least a100mm(4in) high footguard at all points and a mid-height guardrail (see 5.4 for upper platform side panels). 6.5 The total heights of the handrails shall be as given inTable 1. Ta
41、ble 1 6.6 The design horizontal side load at any point on the upper edge of the handrails shall be1780N(400lbf). Under this side load, the maximum allowable deflection as a function of the local height of the handrail shall be 20mm per m(0,25in per ft) of handrail height. A safety factor of 3 : 1 sh
42、ould be applied to the design load in order to obtain the minimum required yield strength, unless a higher safety factor is required by local government regulations concerning equipment for use by the public (see1.3). 7 Elevation and stability 7.1 Each height adjustment shall be performed by increme
43、nts of one full step. Adjustment to intermediate heights should be provided by either controllable platform incline (see5.3) or stair flight incline. 7.2 Reliance on the height adjustment mechanism shall not be considered acceptable. In order to provide a fail-safe operation, a minimum of one mechan
44、ical safety lock shall be incorporated to ensure that the adjusted elevation is maintained at each step when the stairs are subjected to maximum design loads. Preferably, two separate and distinct safety locks (one of which may be hydraulic) should be incorporated for this purpose. 7.3 Power-operate
45、d stabilizers shall be installed in order to provide the stability required for passenger boarding and disembarkation. 7.4 The stabilizers in the retracted position shall not protrude from the vehicles overall width as specified in3.6. The stabilizers in the extended position should preferably not p
46、rotrude from the overall width. 7.5 When supported by the fully extended stabilizers, the fully extended stairs in both the maximum design loads and empty conditions shall meet the static and wind stability criteria of ISO11995. 7.6 It shall not be possible for the stabilizers to collapse in case of
47、 a system failure. 7.7 The suitability of the safety devices defined in7.2 and 7.3 shall be demonstrated by testing with the stairs loaded to their maximum design loads, prior to acceptance for passenger boarding and disembarkation service. 7.8 The stairs shall be fitted with a placard indicating th
48、e maximum load capability as demonstrated in7.7 and the maximum number of passengers to be allowed at any time. 8 Controls 8.1 Controls for extending and retracting the stairs, as well as the upper platform and the stabilizers, shall be located in the vehicle cabin or drivers position. 8.2 Controls
49、shall be protected against any inadvertent activation. Positive confirmation by a warning light or equivalent device shall be provided next to the controls, indicating that the stabilizers are either fully retracted or fully extended and supporting the vehicles weight against a supporting surface. 8.3 An emergency stop button which kills the engine shall be provided at the control panel. 8.4 Unless the unit is electrically operated, the engine shall be equipped with a demand throttle providing high idle whenever one of the hydraul
