Aircraft ground support equipment - Specific requirements - Part 3: Conveyor belt vehicles

This European Standard specifies the technical requirements to minimise the hazards listed in Clause 4 which can arise during the commissioning, the operation and the maintenance of conveyor belt vehicles when used as intended, including misuse reasonably foreseeable by the manufacturer, when carried out in accordance with the specifications given by the manufacturer or his authorised representative. It also takes into account some requirements recognised as essential by authorities, aircraft and ground support equipment (GSE) manufacturers as well as airlines and handling agencies.
This European Standard applies to
a)   self-propelled conveyor belt vehicles with or without driver's accommodation,
b)   self-propelled conveyor belt vehicles equipped with a van body,
c)   towed conveyor belt vehicles,
intended to be used for manual loading/unloading of aircraft.
This European Standard does not apply to any extensions or appurtenances of conveyor belt vehicles entering the aircraft cargo compartment in order to facilitate loading and unloading therein ("Aircraft Bulk Loading Systems", ABLS).
This European Standard does not apply to pneumatic systems and to cable-less remote controls.
This part of EN 12312 is not applicable to conveyor belt vehicles which were manufactured before the date of publication of this European Standard by CEN.
This part of EN 12312 when used in conjunction with EN 1915-1, EN 1915-2, EN 1915-3 and EN 1915-4 provides the requirements for conveyor belt vehicles.

Luftfahrt-Bodengeräte - Besondere Anforderungen - Teil 3: Förderbandwagen

Diese Europäische Norm legt die technischen Anforderungen zur Minimierung der in Abschnitt 4 aufgelisteten Gefährdungen fest, die bei Inbetriebnahme, Betrieb und Wartung unter der vorhersehbaren Anwendung des Förderbandwagens auftreten können, wenn diese in Übereinstimmung mit den Anweisungen des Herstellers oder dessen Beauftragten ausgeführt werden, einschließlich vom Hersteller vernünftigerweise vorhersehbarer Missbrauch. Sie berücksichtigt auch einige Anforderungen, die von den offiziellen Stellen, Herstellern von Luftfahrzeug- und Bodengeräten (GSE, en: ground support equipment) sowie Luftverkehrs- und Abfertigungsgesellschaften als wesentlich erachtet wurden.
Diese Europäische Norm gilt für:
a) selbstfahrende Förderbandwagen mit oder ohne Fahrerplatz;
b) selbstfahrende Förderbandwagen mit geschlossenem Aufbau;
c) schleppbare Förderbandwagen;
die dazu vorgesehen sind, Luftfahrzeuge von Hand zu be- und entladen.
Diese Europäische Norm gilt nicht für Erweiterungen oder Zubehör von Förderbandwagen, die in den Laderaum des Luftfahrzeugs hineinreichen, um das Be- und Entladen darin zu erleichtern („Loseverladesysteme für Luftfahrzeuge“, ABLS, en: aircraft bulk loading systems).
Diese Europäische Norm gilt nicht für pneumatische Systeme und für drahtlose Fernsteuerungen.
Dieser Teil von EN 12312 gilt nicht für Förderbandwagen, die vor der Veröffentlichung dieser Europäischen Norm durch CEN hergestellt wurden.
Dieser Teil von EN 12312 umfasst die Anforderungen an Förderbandwagen, wenn er in Verbindung mit EN 1915 1, EN 1915 2, EN 1915 3 und EN 1915 4 angewendet wird.

Matériel au sol pour aéronefs - Exigences particulières - Partie 3 : Convoyeurs à bande

Podporna oprema na tleh za letalski promet - Posebne zahteve - 3. del: Tračni transporterji

General Information

Status
Published
Publication Date
13-Aug-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-Aug-2020
Due Date
17-Oct-2020
Completion Date
14-Aug-2020

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SLOVENSKI STANDARD
SIST EN 12312-3:2017+A1:2020
01-oktober-2020
Podporna oprema na tleh za letalski promet - Posebne zahteve - 3. del: Tračni
transporterji

Aircraft ground support equipment - Specific requirements - Part 3: Conveyor belt

vehicles
Luftfahrt-Bodengeräte - Besondere Anforderungen - Teil 3: Förderbandwagen

Matériel au sol pour aéronefs - Exigences particulières - Partie 3 : Convoyeurs à bande

Ta slovenski standard je istoveten z: EN 12312-3:2017+A1:2020
ICS:
49.100 Oprema za servis in Ground service and
vzdrževanje na tleh maintenance equipment
53.040.10 Transporterji Conveyors
SIST EN 12312-3:2017+A1:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 12312-3:2017+A1:2020
---------------------- Page: 2 ----------------------
SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2020
EUROPÄISCHE NORM
ICS 49.100 Supersedes EN 12312-3:2017
English Version
Aircraft ground support equipment - Specific
requirements - Part 3: Conveyor belt vehicles

Matériel au sol pour aéronefs - Exigences particulières Luftfahrt-Bodengeräte - Besondere Anforderungen -

- Partie 3 : Convoyeurs à bande Teil 3: Förderbandwagen

This European Standard was approved by CEN on 30 October 2016 and includes Amendment 1 approved by CEN on 22 June

2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12312-3:2017+A1:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 8

4 List of hazards .................................................................................................................................................. 9

5 Safety requirements and/or measures ................................................................................................... 9

5.1 General requirements ................................................................................................................................... 9

5.2 Boom design ................................................................................................................................................... 10

5.3 Access ............................................................................................................................................................... 11

5.4 Guard-rails ...................................................................................................................................................... 12

5.5 Guide rails ....................................................................................................................................................... 13

5.6 Performance (loads and speeds) ............................................................................................................ 13

5.7 Controls ............................................................................................................................................................ 14

5.8 Ergonomics ..................................................................................................................................................... 14

6 Information for use ..................................................................................................................................... 16

6.1 Marking ............................................................................................................................................................ 16

6.2 Warnings ......................................................................................................................................................... 16

6.3 Instructions .................................................................................................................................................... 16

7 Verification of requirements ................................................................................................................... 17

Annex A (normative) List of hazards .................................................................................................................. 18

Annex B (informative) Hazards at boom and belt ......................................................................................... 21

Annex C (normative) Safety measures against drawing-in hazards on pulleys and idlers ............ 22

Annex D (normative) Safety measures on end cross arms or trays ........................................................ 24

Annex E (informative) Safety distances for feet and hands (Extract from EN 349) .......................... 26

Annex ZA (informative) Relationship between this European standard and the essential

requirements of EU Directive 2006/42/EC aimed to be covered ............................................... 27

Bibliography ................................................................................................................................................................. 30

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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)
European foreword

This document (EN 12312-3:2017+A1:2020) has been prepared by Technical Committee CEN/TC 274

“Aircraft ground support equipment”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by January 2021, and conflicting national standards shall

be withdrawn at the latest by January 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document includes Amendment 1 approved by CEN on 2020-05-22.
This document supersedes ! EN 12312-3:2017".

The start and finish of text introduced or altered by amendment is indicated in the text by tags !".

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive 2006/42/EC on

machinery.

For relationship with EU Directive 2006/42/EC on machinery, see informative Annex ZA, which is an

integral part of this document.

EN 12312, Aircraft ground support equipment ― Specific requirements, consists of the following parts:

— Part 1: Passenger stairs;
— Part 2: Catering vehicles;
— Part 3: Conveyor belt vehicles (the present document);
— Part 4: Passenger boarding bridges;
— Part 5: Aircraft fuelling equipment;
— Part 6: Deicers and deicing/antiicing equipment;
— Part 7: Aircraft movement equipment;
— Part 8: Maintenance or service stairs and platforms;
— Part 9: Container/Pallet loaders;
— Part 10: Container/Pallet transfer transporters;
— Part 11: Container/Pallet dollies and loose load trailers;
— Part 12: Potable water service equipment;
— Part 13: Lavatory service equipment;
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)
— Part 14: Disabled/incapacitated passenger boarding vehicles;
— Part 15: Baggage and equipment tractors;
— Part 16: Air start equipment;
— Part 17: Air conditioning equipment;
— Part 18: Nitrogen or Oxygen units;
— Part 19: Aircraft jacks, axle jacks and hydraulic tail stanchions;
— Part 20: Electrical ground power units.
Annexes A, C and D are normative. Annexes B, E and ZA are informative.
The main changes compared to the previous edition EN 12312-3:2003+A1:2009 are:
a) A1:2009 was incorporated;

b) the Introduction was updated in relation to the deviation from recommended criteria;

c) the Scope was updated to cover reasonably foreseeable misuse;
d) Clause 2, Normative references, was updated;

e) List of hazards was updated to exclude hazards due to traffic and repair and was moved to Annex A;

f) 5.1, General requirements, was changed to include a seat-belt or hip guard and further provisions

regarding the driver’s accommodation, e.g. protection from falling loads as well as compliance with

EN 1915-3 and EN 1915-4;
g) 5.2, Boom design was completely revised;

h) 5.3, Access was added, thus making it necessary to re-number the following clauses and subclauses

i) 5.3 Guard-rails, guide rails was re-numbered as 5.4 and divided into 5.4 Guard-rails (covering the

original 5.3.1 through 5.3.5) and 5.5 Guide rails (covering the original 5.3.6 through 5.3.9), it was

expanded to cover foldable and adjustable elements, including the size of allowable gaps;

j) 5.4 Performance (loads and speeds) was re-numbered as 5.6 and contains new provisions regarding

the driving speeds while in raised position and a seat-belt;

k) 5.5 Controls was re-numbered as 5.7 and contains new provisions regarding controls, also during

aircraft loading/unloading operations, and the emergency stop;
l) 5.8, Ergonomics was added;

m) 6.3, Instructions, was extended to cover information about aircraft types and cargo doors, safe

positions for opening/closing of cargo doors, belt bottom tray and restricted operation in adverse

weather conditions;
n) Clause 7, Verification of requirements, was updated;
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)

o) informative Annex A, Typical designs of conveyor belt vehicles, was deleted and replaced by

normative Annex A, List of hazards;

p) informative Annex C, Hazards at boom an belt, was re-numbered as informative Annex B and nip

points were re-named as drawing-in points;

q) informative Annex D, Safety measures against drawing-in hazards on pulleys and idlers was changed

into normative Annex C with the same title and updated;

r) informative Annex E, Safety measures on end cross arms or trays, was changed into normative

Annex D with the same title;

s) informative Annex F, Safety distances for feet and hands (Extract from EN 349), was re-numbered as

informative Annex E;

t) Annex ZA referring to the Machinery Directive 98/37/EC was replaced by Annex ZA referring to the

new Machinery directive 2006/42/EC;
u) the Bibliography was updated.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)
Introduction

This European Standard specifies health and safety requirements, as well as some functional and

performance requirements, for conveyor belt vehicles intended for loading/unloading of individual

items of baggage or cargo on/off all aircraft types commonly in service in civil air transport.

The minimum essential criteria are considered to be of primary importance in providing safe,

serviceable, economical and practical conveyor belt vehicles. Deviations should occur only after careful

consideration, extensive testing, risk assessment and thorough service evaluation have shown

alternative methods or conditions to be satisfactory. Such deviations are outside the scope of this

standard and a manufacturer should be able to demonstrate an equivalent level of protection.

This European Standard is a Type C standard as stated in EN ISO 12100.

When provisions of this Type C standard are different from those that are stated in Type A or B

standards, the provisions of this Type C standard take precedence over the provisions of the other

standards for machines that have been designed and built according to the provisions of this Type C

standard. Deviations from requirements do not fall within the presumption of conformity given by the

standard.
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)
1 Scope

This European Standard specifies the technical requirements to minimize the hazards listed in Clause 4

that can arise during the commissioning, operation and maintenance of conveyor belt vehicles when

used as intended, including misuse reasonably foreseeable by the manufacturer, when carried out in

accordance with the specifications given by the manufacturer or his authorized representative. It also

takes into account some requirements recognized as essential by authorities, aircraft and ground

support equipment (GSE) manufacturers as well as airlines and handling agencies.
This European Standard applies to
a) self-propelled conveyor belt vehicles with or without driver's accommodation,
b) self-propelled conveyor belt vehicles equipped with a van body,
c) towed conveyor belt vehicles,
intended to be used for manual loading/unloading of aircraft.

This European Standard does not apply to any extensions or appurtenances of conveyor belt vehicles

entering the aircraft cargo compartment in order to facilitate loading and unloading therein (“Aircraft

Bulk Loading Systems”, ABLS).

This European Standard does not apply to pneumatic systems and to cable-less remote controls.

This part of EN 12312 is not applicable to conveyor belt vehicles that were manufactured before the

date of publication of this European Standard by CEN.

This part of EN 12312 when used in conjunction with EN 1915-1, EN 1915-2, EN 1915-3 and EN 1915-4

provides the requirements for conveyor belt vehicles.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN 349, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

EN 1175-1, Safety of industrial trucks — Electrical requirements — Part 1: General requirements for

battery powered trucks
EN 1837, Safety of machinery — Integral lighting of machines

EN 1915-1:2013, Aircraft ground support equipment - General requirements - Part 1: Basic safety

requirements

EN 1915-2:2001+A1:2009, Aircraft ground support equipment - General requirements - Part 2: Stability

and strength requirements, calculations and test methods

EN 1915-3, Aircraft ground support equipment — General requirements — Part 3: Vibration

measurement methods and reduction

EN 1915-4, Aircraft ground support equipment — General requirements — Part 4: Noise measurement

methods and reduction
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)

EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk

reduction (ISO 12100:2010)

EN ISO 13849-1:2015, Safety of machinery - Safety-related parts of control systems - Part 1: General

principles for design (ISO 13849-1:2015)

EN ISO 13850:2015, Safety of machinery - Emergency stop function - Principles for design (ISO

13850:2015)

EN ISO 14122-1, Safety of machinery - Permanent means of access to machinery - Part 1: Choice of fixed

means and general requirements of access (ISO 14122-1:2016)
ISO 11532:2012, Aircraft ground equipment — Graphical symbols
ISO 11228-1, Ergonomics — Manual handling — Part 1: Lifting and carrying

ISO 11228-3, Ergonomics — Manual handling — Part 3: Handling of low loads at high frequency

DIN 51130:2014-02, Testing of floor coverings — Determination of the anti-slip property — Workrooms

and fields of activities with slip danger — Walking method — Ramp test
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100 and

EN 1915-1:2013 and the following apply.
3.1
conveyor belt vehicle
vehicle comprising a chassis, a boom with a belt, and a lifting device
3.2
boom

load carrying assembly which includes a belt to move the load, and any possible tray attached to it

3.3
telescopic boom
load carrying assembly, adjustable in length
3.4
lifting device
system to vary the height of the boom
3.5
incline
angle of the boom to a horizontal plane
3.6
guide rail
lateral device attached to the boom to prevent loads from falling off the sides
3.7
tray
loading platform fitted at either end of the boom and independent of the belt
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)
3.8
contact protection system

device at the end of the boom to disconnect the power source during approach/travel to the aircraft

4 List of hazards

The list of risks and hazards (given in Annex A) is based on EN ISO 12100:2010 and contains the

hazards and hazardous situations, as far as they are dealt with in this European Standard, identified by

risk assessment as significant for conveyor belt vehicles and which require action to eliminate or reduce

risks. Not covered are risks and hazards due to the traffic and repair.
5 Safety requirements and/or measures
5.1 General requirements

5.1.1 Conveyor belt vehicles shall conform to the relevant requirements of EN 1915-1, EN 1915-2,

EN 1915-3 and EN 1915-4 unless otherwise specified in this European Standard. They shall also

conform to the specific requirements of this European Standard.
5.1.2 Strength calculations shall be carried out in accordance with EN 1915-2.

5.1.3 Stability calculations shall be carried out according to EN 1915-2. Special attention shall be paid

to travel conditions.

5.1.4 Driver's accommodation of self-propelled vehicles shall be fitted with at least a two-point seat

belt. A hip guard shall be provided for non-fully enclosed accommodation.

Driver accommodation shall provide unobstructed visibility across the boom when it is in the lowered

driving position.

Driver position controls shall be protected against a load falling from the boom.

5.1.5 The electrical system of battery powered conveyor belt vehicles shall conform to EN 1175-1,

with the exception of standard automotive chassis.
5.1.6 The boom shall protrude at least at the ramp side.

5.1.7 The conveyor belt vehicle shall be capable of servicing any aircraft sill height, for which it is

designed, with the opposite end within the height range specified in 5.2.9 and 5.8.4.

NOTE See 6.3, Instructions for use, for listing by the manufacturer of aircraft types the conveyor is intended

to serve

5.1.8 Where adjustment of elevation of both ends of the boom is provided it shall be possible to adjust

the ends independently from each other.

5.1.9 Independent of the position of the boom it shall be possible to gain access to service points

requiring frequent use (e.g. daily) at any time without operating the power source.

5.1.10 All sharp edges or corners resulting from the manufacturing process shall be chamfered or

rounded with a minimum radius of 3 mm.

5.1.11 Where a sprung front axle is used, the suspension shall be restricted so as to limit vertical

movement at the aircraft end of the boom, when the conveyor belt vehicle is being driven, e.g. by using

shock absorbers.
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)

5.1.12 Where power operated stabilizers are provided, it shall be possible to retract the stabilizers in

the event of primary power loss by auxiliary means, e.g. hand pump.

5.1.13 Structural parts or stabilizers of pedestrian controlled self-propelled conveyor belt vehicles

shall not protrude from the overall length within the operating range of the tiller.

5.1.14 Where lights for the illumination of working areas or positioning lights are fitted, their design

shall conform to EN 1837. The minimum luminous flux of the lamp shall be 250 lm.
5.2 Boom design

5.2.1 The design of the boom, where intended, shall be such that it can be used by the operator as a

ramp to gain access to the hold door and safely open or close it, enter the hold or exit from it (see

EN 1915-1:2013, Introduction, f) — negotiation).
NOTE Requirements for guard-rails, see 5.4 and 5.5.

5.2.2 Access from the ground to the chassis and from the chassis to the belt shall meet the

requirements of EN 1915-1:2013, 5.14 and 5.3 hereafter.

5.2.3 The boom shall be connected to the lifting system by a means that prevents unintended

disconnection.

5.2.4 The lifting device of the boom shall be protected against unintentional movement, e.g. on

hydraulic cylinders by a lock-valve mounted directly to the cylinder.

5.2.5 Drawing-in to trapping points at conveyor belt pulleys shall be prevented by one of the

measures described at Annex C, or equivalent. Annex B provides examples of drawing-in points.

5.2.6 Where a tray is mounted at either end of the boom, protection against trapping of limbs

between the tray and the running belt shall be provided by construction in accordance with Figure D.2

and Figure D.3 or by safety distances in accordance with Figure D.1 (see Annex E).

5.2.7 Protection against crushing and shearing between the boom and accessible fixed parts shall be

provided, e.g. by shielding with protective plates. It shall meet the requirements of EN 1915-1:2013,

5.15, in particular where the conveyor belt vehicle is equipped with driver’s accommodation.

5.2.8 The end of the boom interfacing with the aircraft shall be protected by suitable means, e.g.

bumpers and/or side wheels.
The aircraft protection device(s) shall:

a) be of a non-marking semi-soft material with a Shore surface hardness not exceeding A50,

b) ensure a minimum 60 mm crushing capability,

c) be designed to minimize any force exerted onto the aircraft cargo compartment doorframe.

It is recommended that the static force equivalent does not exceed 1 500 N distributed over the length,

or 1 500 N on any 100 mm x 100 mm contact area.

The aircraft interface device may include a contact detection feature able to provide an electrical signal

when contact with the aircraft is achieved at any point and which can be used to stop movement. In this

case, the related interlocking systems shall achieve Performance Level “b” according to

EN ISO 13849-1:2015.
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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)

5.2.9 The boom height shall be such that, when in working position on all aircraft types intended to

be serviced, the belt at the ramp end shall have an adjustable height range between !0,55 m" or

less to 0,85 m or more.

See Clause 5.8 on ergonomic recommendations and EN 1915-1:2013, Introduction, f) – negotiation,

taking into account the height of the loose load trailers at the airport of use.

The ground clearance shall allow without interference the traversing of two surfaces intersecting at an

angle of ± 3° (5 %) either in bridging or cresting. Where this is not possible, a safety interlock shall be

provided to prohibit vehicle travel if the ramp end of the boom is too low and may touch the ground as a

result of vehicle movement on its suspensions. In this case, the related interlocking systems shall

achieve Performance Level “b” according to EN ISO 13849-1:2015.

The maximum boom incline in the working position when the aircraft end is highest and the ramp end

lowest should not exceed 22° (40 %) (see 5.3.3).

NOTE See 6.3, Instructions for use, for listing by the manufacturer of the aircraft types the conveyor is

intended to serve.

5.2.10 The minimum belt width shall be 600 mm. The belt shall be weather proof and where linking

means are used, care shall be taken to avoid protruding parts or gaps.

5.2.11 The belt shall have an anti-slip surface (see 5.3.3) and shall be designed to provide for drainage

of water.

5.2.12 The belt shall be supported by rollers and/or other devices to allow safe conveyance of load(s)

and for safe walking purposes preferably by plates.

5.2.13 The friction between drive drum and belt shall be sufficient to exclude slipping under maximum

payload.

The influence of weather conditions to be expected on the airport of use should be taken into account

(see EN 1915-1:2013, Introduction, f) — negotiation).

5.2.14 A belt tensioning system covering the foreseeable elongation of the belt shall be installed. The

adjustment shall be possible without dismounting of parts or use of special tools.

5.2.15 The belt drive system shall include a safety device which operates whenever the motive power

is cut off or fails, to prevent a loaded belt from free running due to the potential energy of the load.

5.3 Access

5.3.1 Personnel access with protection against the risk of falling shall be provided:

a) from the ground to the rear / lower part of the boom,

b) for walking on the belt to reach the aircraft cargo compartment door (see 5.3.3),

c) from the belt into the aircraft cargo compartment.

5.3.2 The means of access from ground to belt shall consist in steps located in the aft part of the

vehicle. The belt surface may constitute the upper landing, and a fixed part of the vehicle's chassis may

be used as one of the steps providing its surface is anti-slip and the riser height remains constant.

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SIST EN 12312-3:2017+A1:2020
EN 12312-3:2017+A1:2020 (E)

The access steps shall be provided on their outer side(s) with a fixed guard-rail meeting the

requirements of EN 1915-1:2013, Annex D.3 f), ensuring a safe transition to and from the boom's guard-

rail (see 5.4.1). Any gap between the two guard-rails due to boom position shall so far as practicable not

exceed 120 mm.

5.3.3 Access to/from the aircraft cargo compartment door level may be by walking up/down the

surface of the belt. For this purpose:

a) the boom inclination shall be kept as low as possible consistent with the aircraft to be served and,

as a deviation from EN ISO 14122-1, should not exceed 22° (40 %).

NOTE See 6.3, Instructions for use, for listing by the manufacturer of the aircraft types the conveyor is

intended to serve.

b) the belt's surface shall have a durable slip-resistant surface, with a minimum R13 slip-resistance

classification including while soaked in water. Slip resistance classification shall be measured in

accordance with DIN 51130:2014-02, Table 3.

The influence of weather conditions to be expected at the airport of use should be taken into account

(see EN 1915-1:2013,Introduction, f) — negotiation).

c) both sides of the belt shall be protected by guard-rails meeting the requirements of 5.4.

5.3.4 The situation most prone to a tripping and falling hazard during access and egress is

opening/closing the aircraft cargo compartment's door while standing or kneeling, as appropriate, on

the belt. Provisions shall be made for eliminating or reducing the risk of falling during door opening and

closure.

When aircraft cargo compartment door opening or closure requires the use of both hands, guard-rails

with telescopic sections that can be adjusted to minimize gaps prior to door opening/closing shall be

provided.
5.4 Guard-rails

5.4.1 Guard-rails shall be installed on each long side of the boom where the maximum intended

height from ground level to the belt surface exceeds 1 m. One or b
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