SIST EN 4697:2016

Aerospace series - General and installation requirements for passenger seat fittings

This standard specifies the installation and removal requirements and the space envelopes for passenger seat fittings on aircraft. The purpose is to reduce the installation time and the tooling required for seat installation by standardizing the seat attachment fasteners (fittings).

Luft- und Raumfahrt - Allgemeine und Einbau Anforderungen an die Sitzanbindung von Passagiersitzen

Diese Europäische Norm legt die Anforderungen an den Einbau und Abbau sowie die Freiräume für die Anbindungen von Passagiersitzen in Luftfahrzeugen fest. Ziel ist es, die Einbauzeit und die Menge der für den Sitzeinbau erforderlichen Werkzeuge zu verringern, indem die Sitzbefestigungsmittel (Anbindungen) genormt werden.

Série aérospatiale - Exigences générales et d'installation pour siège passager

La présente Norme européenne spécifie les exigences d’installation et de démontage ainsi que les gabarits d'encombrement des ferrures de sièges passagers à bord. Elle a pour but de diminuer le temps d'installation et l'outillage exigé pour réaliser l'installation des sièges en normalisant les éléments de fixation des sièges (ferrures).

Aeronavtika - Splošne zahteve in zahteve za namestitev pritrdilnih elementov potniških sedežev

Ta evropski standard določa zahteve za namestitev in odstranitev ter prostorske okvire za pritrdilne elemente potniških sedežev na letalu. Namen je s standardizacijo sponk za pritrditev sedežev (pritrdilnih elementov sedežev) skrajšati čas namestitve in omejiti orodje, potrebno za namestitev sedeža.

General Information

• Status: Published
• Publication Date: 12-May-2016
• ICS: 49.095 - Passenger and cabin equipment
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-May-2016
• Due Date: 11-Jul-2016
• Completion Date: 13-May-2016
• Ref Project: EN 4697:2016 - Aerospace series - General and installation requirements for passenger seat fittings

Relations

• Replaces: SIST EN 4697:2012 - Aerospace series - General and installation requirements for passenger seat fittings
• Effective Date: 01-Jun-2016

Overview

EN 4697:2016 - "Aerospace series: General and installation requirements for passenger seat fittings" (CEN) standardizes the design, space envelopes, installation and removal of passenger seat fittings (seat attachment fasteners) for transport aircraft. Its primary purpose is to reduce seat installation time and tooling by defining common interfaces, tolerances and functional requirements for fittings and their shear‑locking devices (SLDs).

Key Topics and Requirements

• Scope & intent: Defines installation/removal requirements and space envelopes for passenger seat fittings to enable rapid, repeatable seat installation.
• Space envelopes & interface:
  • Compatibility with the standard seat rail profile and tolerances (e.g. rail width ~25.3–25.5 mm, pitch tolerance ±0.1 mm per pitch, ±0.5 mm per 100 pitches).
  • Track splice and hole-centre tolerances (slot centerlines to within 0.13 mm; faces within 0.5°).
  • Cable routing allowance (fitting width ≤ 25.4 mm / 1 in).
• Fitting classes & mass limits: Fittings are classified A–F with defined maximum weights (examples: rear triple-stud fittings ≤ ~150 g; forward single-stud fittings ≤ ~50 g).
• Installation ergonomics:
  • Quick, single‑person installation; no special tools required to lock.
  • A single Allen key (3/16, 1/4 or 5/16) may be used for unlocking.
  • Maximum locking force: (5 ± 1) daN.
  • Typical seat installation (2 forward + 2 aft fittings) ≤ 1 minute; reconfiguration ≤ 5 minutes.
• Shear‑locking device (SLD):
  • Positive engagement (gravity, spring, or self‑locking) with visible indication from the aisle.
  • SLD permitted only in rear fitting; must not require safety wire.
• Durability, safety & environmental:
  • Lifecycle tests: ≥1 000 locking cycles; ≥100 movement cycles; ≥100 environmental cycles with contaminants and cleaning agents.
  • Static interface loads specified (examples: rear fitting Fx ±2 700 daN, Fy ±1 600 daN, Fz ±3 500 daN).
  • Attention to corrosion resistance and galvanic compatibility; repair limits for seat track rework defined.

Applications and Who Uses It

• Aircraft seat manufacturers and fitting suppliers designing attachment hardware
• OEM cabin integration engineers and interior design teams
• MRO organizations and airlines performing seat removal, reconfiguration and retrofit
• Certification and airworthiness engineers referencing interface loads and test requirements

Related Standards

• EN 9100 / EN 9133 (aerospace QMS)
• CS‑25 / FAR 25 (airworthiness, load specifications)
• RTCA DO‑160 (environmental conditions)
• SAE AMS documents (cleaners, de‑icing agents) referenced for environmental testing

Keywords: EN 4697:2016, passenger seat fittings, seat installation, seat track, shear‑locking device, aerospace standard, seat reconfiguration.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Splošne zahteve in zahteve za namestitev pritrdilnih elementov potniških sedeževLuft- und Raumfahrt - Allgemeine und Einbau Anforderungen an die Sitzanbindung von PassagiersitzenSérie aérospatiale - Exigences générales et d'installation pour siège passagerAerospace series - General and installation requirements for passenger seat fittings49.095Oprema za potnike in oprema kabinPassenger and cabin equipmentICS:Ta slovenski standard je istoveten z:EN 4697:2016SIST EN 4697:2016en,fr,de01-junij-2016SIST EN 4697:2016SLOVENSKI
STANDARDSIST EN 4697:20121DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4697
April
t r s x ICS
v {ä r { w Supersedes EN
v x { yã t r s tEnglish Version
Aerospace series æ General and installation requirements for passenger seat fittings Série aérospatiale æ Exigences générales et d 5installation pour siège passager
Luftæ und Raumfahrt æ Allgemeine und Einbau Anforderungen an die Sitzanbindung von Passagiersitzen This European Standard was approved by CEN on
t y September
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
v x { yã t r s x ESIST EN 4697:2016

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 9100, Quality Management Systems — Requirements for Aviation, Space and Defence Organizations EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace standard parts AMS 1424J, Deicing/Anti-Icing Fluid, Aircraft1) AMS 1428F, Fluid, Aircraft De-icing/Anti-Icing, Non-Newtonian, (Pseudoplastic)1) AMS 1550B, Cleaner, Water Base, Aircraft Interior Hard Surface Materials1) AMS 1630C, Cleaner, Carpet Shampoo Type1) AMS 1631C, Cleaner, Carpet Water Extraction Type1) AS8049B, Performance Standard for Seats in Civil Rotorcraft, Transport Aircraft and General Aviation Aircraft1) CS-25 Amendment 5, 5th September 2008, Certification Specification for Large Aeroplanes2) FAR 25 Amendment 127, 28th October 2008, Airworthiness Standards: Transportation Category Airplanes3) RTCA DO-160F ,6th December 2007, Environmental Conditions and Test Procedures for Airborne Equipment4)
1) Published by: SAE National (US) Society of Automotive Engineers (http://www.sae.org/). 2) Published by: European Aviation Safety Agency (EASA), Postfach 101253, D-50452 Koeln, Germany. 3) Published by: FAA National (US) Federal Aviation Administration (http://www.faa.gov/). 4) Published by: Radio Technical Commission for Aeronautics (RTCA), 1828 L Street, NW, Suite 805 Washington, DC 20036, USA.
Key 1 Monument 2 Fitting body 3 Carpet 4 Floor panel 5 Seat rail 6 Raceway Figure 1 — Fitting environment 1 All fittings attached to seat legs shall be pre-set to the correct seat track dimensions with fine adjustment of the fitting during installation not being necessary. Minimum front to rear fitting distance shall be 482,6 mm (19”) between the extreme studs of each fitting.
Figure 2 — Aircraft Coordinate System SIST EN 4697:2016

g A Rear triple stud fitting ≤ 150 B ≤ 250 C Rear quadruple stud fitting ≤ 200 D ≤ 290 E Forward single stud fitting ≤ 50 F ≤ 90
Maintenance or repair work on the seat track shall be taken into account during fitting design. Details see Figure 3. Dimensions in millimetres
Figure 3a — Seat track top view
Figure 3b — Seat track 3 D view Continued SIST EN 4697:2016

Figure 3c — Damage repair cross section 1
Figure 3d — Damage repair cross section 2
Figure 3e — Damage repair top view Key 1 If the amount of material removed on one side of a seat track exceeds 0,3 mm (0,012 inch) maximum in depth, it is necessary to remove the same amount from the other side, so that a level surface is achieved 2 Minimum remaining thickness after rework 3 Maximum rework depth as reference to nominal thickness Figure 3 — Seat track allowable damage limits and repair solutions The fitting design shall show no evidence of any movement/rattling of the fitting-track combination. A continuous load path shall be ensured at all times. A shear-locking device should only be incorporated in the rear fitting. Fitting design and performance shall be validated incorporating the fitting-seat combination. SIST EN 4697:2016

Dimension A Tolerance of ± 0,1 mm (0,004 inch) on 1 pitch Tolerance of ± 0,5 mm (0,020 inch) on 100 pitches Figure 4 — Seat rail top view
Detailed seat rail dimensions, see Table 2. Figure 5 — Seat rail cross section SIST EN 4697:2016

25,3 25,5 19,7 20,0 10,7 11,0 20,5 21,0 7,8 8,0 2,3 2,7 13,75 14,25 0 1,0 0,8 1,8 Full 1,0040,996 0,7870,776 0,4330,421 0,8270,807 0,3150,307 0,1060,091 0,0390 0,0710,031 Full NOTE 1 Diameter B and slot centerline D shall be coincident with slot centerline C to within 0,13 mm (0,005 inch). NOTE 2 All faces shall be within 0,5° of the specified position relative to the upper surface of the rail.
Figure 6 — Location tolerances of separate tracks SIST EN 4697:2016

Key 1 Seat track on section 1 2 Junction seat rail 3 Centerline of A1 – A2 4 Seat track on section 2
A1 Last hole of seat track section 1 A2 Last hole of seat track section 2 Figure 7 — Track splice tolerance in x The fitting shall be compatible with the currently marketed seat
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