1、BRITISH STANDARD AEROSPACE SERIES BS M 73:1994 ISO 9666:1993 Aircraft Self-propelled lavatory-servicing vehicle Functional requirements UDC 629.7.083:629.114.4-479:628.427.3BSM73:1994 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspubli
2、shed under the authorityof the Standards Boardand comes into effect on 15March 1994 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/57 Draft for comment 91/73815 DC ISBN 0 580 22862 2 Committees responsible for this BritishStandard The preparatio
3、n of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/57, upon which the following bodies were represented: Association of Webbing Load Restraint Equipment Manufacturers British Airways British Narrow Fabrics Association Civil Aviatio
4、n 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 CommentsBSM73:1994 BSI 01-2000 i Contents Page Committees responsible Ins
5、ide front cover National foreword ii 1 Scope 1 2 Normative references 1 3 General requirements 1 4 Tank design 1 5 Waste tank features 2 6 Rinsing tank features 2 7 Main pump 2 8 Hoses 2 9 Working platform 2 10 Options 3 Annex A (informative) Vacuum-assisted extraction 4 List of references Inside ba
6、ck coverBSM73:1994 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee. It is identical with ISO 9666:1993 Aircraft Self-propelled lavatory-servicing vehicle Functional requirements, published by the International O
7、rganization for Standardization (ISO). Cross-references. The Technical Committee has reviewed the provisions of ISO1950:1974, ISO 6966:1982 and the World Health Organization Guidelines for Drinking-Water Quality, Volumes 1 and 2, to which normative reference is made in the text, and has decided that
8、 they are acceptable for use in conjunction with this standard. Annex A provides information on vacuum-assisted extraction. 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
9、with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had a
10、mendments incorporated. This will be indicated in the amendment table on the inside front cover.BS M 73:1994 BSI 01-2000 1 1 Scope This International Standard specifies functional requirements for a self-propelled lavatory-servicing vehicle suitable for all aircraft types commonly in service in civi
11、l air transport. It does not specify equipment design but highlights certain criteria that are known to be essential for efficient operation in the airline environment. In all cases, this International Standard shall be applied with due reference to national regulations on sanitation that are applic
12、able in the area in which it is proposed that the vehicle is to be used. 2 Normative references The following 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 s
13、tandards are subject to revision, and parties to agreements based on this International Standard are encouraged 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.
14、ISO 1950:1974, Aircraft Identification of servicing, maintenance, ground handling and safety/hazard points. ISO 6966:1982, Aircraft Basic requirements for aircraft loading equipment. World Health Organization, Guidelines for Drinking-Water Quality. Volume 1. Recommendations. Geneva. 1984. ISBN 92 4
15、154 1687. World Health Organization, Guidelines for Drinking-Water Quality. Volume 2. Criteria and Other Supporting Information. Geneva. 1986. ISBN92 4 154 1695. 3 General requirements 3.1 The vehicle shall be capable of accepting, transporting and disposing of waste products that can be removed fro
16、m the aircraft. 3.2 The vehicle shall be used only for servicing aircraft lavatory systems and any connections to the aircraft systems shall be so designed as to prevent their inadvertent use on any other aircraft system. See ISO 1950 for identification marking of service points. 3.3 The unit shall
17、be capable of servicing aircraft lavatory systems from points located at heights ranging from 1,6 m (63 in) to 4,5 m (177 in) above ground level. 3.4 Whenever justified, the unit should be mounted upon a standard, commercially available chassis in order to ensure maximum economies in purchase and ru
18、nning costs. 3.5 The overall weight, dimension and stability of the unit shall satisfy all regulations applicable to road vehicles in the intended country of use, in accordance with the requirements of ISO 6966. 3.6 The overall dimensions of the vehicle shall be kept to a minimum. 3.7 The lowest poi
19、nt of the loaded unit shall be not less than 200 mm (8 in) above level ground. 3.8 The unit shall be capable of turning within a swept radius of 12,2 m (40 ft). 3.9 When negotiating two intersecting ramps with a5 difference in angle, no part of the structure of the unit shall be less than 130 mm (5
20、in) from the ground. 3.10 Except for the drivers cab, no structural part of the unit shall be more than 1,63 m (64 in) above the ground when the working platform is in the fully lowered position. 3.11 Except for the drivers cab, all parts of the unit shall be made from noncorrosive material or mater
21、ial which has been treated against corrosion. 3.12 The unit shall be fitted with a working platform which, if required, shall elevate so as to allow efficient operation of all appropriate controls on the unit and the aircraft. 3.13 The unit shall be fitted with lighting so as to allow safe operation
22、 in darkness. 3.14 The electrical system shall be of such capacity as to allow servicing of at least one aircraft with the engine running at idle speed. 3.15 Each electrical circuit shall be protected from overload by an independent circuit breaker. 3.16 Visibility from the drivers position shall be
23、 such as to facilitate easy and safe manoeuvring and positioning of the unit near and onto the aircraft. 4 Tank design 4.1 The unit shall have waste-collection and rinsing-water tanks that are separate and independent. 4.2 In order to be easily cleanable, the tanks shall have the following features:
24、 a) all inside fittings, welds, joints and rivets shall have a smooth finish; b) cylindrical ends shall be dished and any corners rounded to a radius of at least 75 mm (3 in);BS M 73:1994 2 BSI 01-2000 c) the bottom of the tank shall have a slope of 5 , preferably with the lowest point at the rear o
25、f the vehicle. 4.3 Baffles shall be installed inside the tank so as to prevent any surge of load when the vehicle is driven. 4.4 Both tanks shall have a leakproof manhole in the top so as to facilitate cleaning and inspection. 4.5 The tanks shall be fitted with suitable gas/air vents. 4.6 The tanks
26、shall be fitted with easily visible and suitably protected liquid level-gauges. 4.7 The chassis mountings of the tanks shall be constructed so as to absorb impacts and vibrations in the most adverse loading conditions during service. 4.8 A walkway, at least 300 mm (12 in) wide, shall be fitted on ea
27、ch side at the top of the vehicles structure. 5 Waste tank features 5.1 The capacity of the waste tank shall be between1 800|396 gal (UK) and 3 500|770 gal (UK). 5.2 A dump valve of at least 100 mm (4 in) diameter shall be fitted to the lowest point of the tank. 5.3 The operating handle of the dump-
28、valve shall be so located as to protect the operator from being splashed with effluent when emptying the tank. 5.4 The tank shall be equipped for internal cleaning and flushing. 6 Rinsing tank features 6.1 The rinsing tank shall have a capacity of between 1 100|224 gal (UK) and 1 800|396 gal (UK). 6
29、.2 The tank shall be equipped with a drain plug and filler cap. 6.3 The tank shall be equipped for internal cleaning and flushing. 7 Main pump 7.1 The main pump shall be directly connected to the rinsing tank outlet and shall be driven by a power-take-off from the main engine or by an auxiliary powe
30、r source. 7.2 The outlet of the main pump shall be fitted with a two-way valve. One position shall be to feed the water delivery hose and the other shall be to feed the waste-tank flushing system. 7.3 Where the pump is driven by a power-take-off, it shall not be possible to operate the pump unless t
31、he vehicles road gears are in a neutral position. 7.4 The capacity of the pump shall be equivalent to: flow: 120 l/min 26 gal (UK)/min; pressure: 350 kPa (50 lbf/in 2 ). 7.5 There shall be a relief valve located close to the working platform to allow the pressure to be regulated according to the req
32、uirements of different aircraft types. The valve shall be easily adjustable between 150 kPa (21 lbf/in 2 ) and 350 kPa (50 lbf/in 2 ) and should be fitted with an easily readable pressure gauge. 7.6 Controls shall be provided so as to allow the unit to be operated from the ground as well as from the
33、 working platform. 7.7 A meter, equipped with a zero reset, shall be provided to indicate the amount of rinsing water delivered to the aircraft. 8 Hoses 8.1 The rinsing water hose shall be flexible and noncollapsible; be at least 5 m (16 ft) long; have an inside diameter of 25 mm (1 in); have a coup
34、ling at the delivery end compatible with the aircraft types to be serviced 1) ; be stowed on a hose reel at the rear of the vehicle. 8.2 The waste hose shall be flexible and noncollapsible; have an inside diameter of 100 mm (4 in); be at least 5 m (16 ft) long; have a coupling compatible with the ai
35、rcraft types to be serviced and which will allow the waste to flow by gravity into the waste tank 1) ; have provision to be stowed, together with the coupling at a suitable location on the vehicle. 9 Working platform 9.1 An elevating working platform of dimensions800 mm 800 mm (31,5 in 31,5 in) shal
36、l be provided at the rear of the vehicle. 9.2 The height range of the working platform shall be from 0,4 m (16 in) to 3 m (118 in) from the ground. 9.3 The platform shall have a lifting speed between80 mm/s (3,1 in/s) and 150 mm/s (5,9 in/s). 1) An International Standard covering this subject is in
37、preparation.BS M 73:1994 BSI 01-2000 3 9.4 The minimum lifting capacity of the platform shall be 160 kg (350 lb) or more if so required by national safety regulations for one-operator platforms. 9.5 The floor of the working platform shall be constructed of open-work material so as to allow self-drai
38、ning and cleaning. 9.6 The fastening connectors for the hoses shall be installed in the basket of the working platform. 9.7 The controls in the working platform shall be duplicated so that the unit can be operated from ground level. 9.8 Control panels and working areas shall be equipped with adequat
39、e lighting for night operation. 9.9 All working platforms and access ways shall be equipped with adequate hand/safety rails. 9.10 The location of the hoses shall be such that there is no risk of hose damage caused by movement of the working platform. 9.11 A transmission interlock shall be fitted so
40、that vehicle movement is not possible with the working platform raised. 10 Options The following optional equipment may also be added to the basic vehicle specified above: a) additional tank to contain and dispense disinfecting fluid; b) system insulation incorporating insulation and/or a heating sy
41、stem to protect fluids from freezing; c) manual water pump; d) manual pump to raise and lower the working platform; e) powered hosereel for the rinsing water hose; f) dump-valve designed for direct connection to the ground drainage system; g) retractable handrail around the top of the tank structure
42、; h) adjustable steps instead of an elevating working platform.BS M 73:1994 4 BSI 01-2000 Annex A (informative) Vacuum-assisted extraction A.1 Many lavatory-servicing vehicles operate on a gravity drainage system. Since the 1970s, however, lavatory-servicing vehicles equipped for vacuum-assisted ext
43、raction have been in use in some areas. A.2 In principle, these vehicles have an additional pump installed which creates a negative pressure within the vehicles waste tank(s). A.3 The purpose of the system is to speed the flow of fluids and to assist with the clearance of “soft” blockages, although
44、the systems are, generally, not effective in clearing “hard” blockages. A.4 Views within the industry on the use of vacuum-assisted units are polarised to a considerable extent due partly to the possibility of damage to aircraft systems as a result of the collapse of pipes and ducting caused by the
45、vacuum and partly due to concern on issues of personnel safety. A.5 There are records of damage to aircraft systems during lavatory servicing by vacuum althrough, in almost all cases, there have been contributory factors other than the use of vacuum-assisted extraction. A.6 The use of vacuum-assiste
46、d extraction is accepted by the major airframe manufacturers, recommended by some airlines and used as normal procedure by some handling agencies. Vacuum assistance, however, cannot be used for all aircraft types or configurations and is prohibited by some airlines and not generally used in some cou
47、ntries. A.7 Due to the reservations held in some areas, the system should therefore only be used with the operators express approval and then only if the vacuum can be accurately adjusted and after reference to the aircraft operator for the negative pressure to be used. A.8 If vacuum-assisted extrac
48、tion is used, suction shall not be applied until the aircraft waste drain valves have been opened nor while any lavatory is occupied.BSM73:1994 BSI 01-2000 List of references See national foreword.BS M 73:1994 ISO 9666:1993 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI
49、is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this Bri
