1021 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAA OPTAHM3AUWR O CTAHAAPTW3AUWMORGANISATION INTERNATIONALEDE NORMALISATION Aircraft -- Engine nacelle fire extinguisher apertures and doors Aeronefs--Ouvertures etportesd'accesauxfuseauxmoteursd'aéronefspourlesextincteursd'incendie First edition - 1980-10-01 ISO 1021-1980 (E) UDC 629.7.067.8 Ref.No.1SO 1021-1980 (E) Descriptors : aircraft, propellant engines, doors, ports (openings), fire equipment, fire extinguishers, dimensions. Pricebasedon1page intiInft Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso member bodies). The work of developing Inter- national Standards is carried out through ISo technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the Iso Council. International Standard ISO 1021 was developed by Technical Committee ISO/TC 20, Aircraft and space vehicles, and wascirculatedtothememberbodiesin November1978. It has been approved by the member bodies of the following countries : Austria Italy Spain Belgium Japan Turkey Brazil Korea, Rep.of United Kingdom Canada Netherlands USA Czechoslovakia Poland USSR Germany, F. R. Romania France South Africa, Rep. of No member body expressed disapproval of the document. This International Standard cancels and replaces ISo Recommendation R 1021-1969, of which it constitutes a technical revision. International Organization for Standardization,1980 Printed in Switzerland E"eqr[tkijvgf"d["WPG."E1"Igpqxc."8"4:226"Ocftkf.'Urckp"cm"tkijwu"tgugtxgf"Ygf"Hgd’36*24k35<2 :"WVE"4246 ISO 1021-1980 (E) INTERNATIONALSTANDARD Aircraft Engine nacelle fire extinguisher apertures and doors Scope and field of application This International Standard relates to apertures and doors in aircraft engine nacelles for the insertion of the nozzles of ground fire- extinguishing equipment. 2Requirements either round or square in shape and of the following dimensions : Round : The diameter shall be from 100 mm minimum to 130 mm maximum. Square : The sides of the square shall be from 100 mm minimum to 130 mm maximum. 2.2 The apertures may be fitted with spring-loaded, inward-opening doors which shall be lipped or beaded to facilitate the insertion and the withdrawai of the extinguisher nozzle. E"eqr[tkijvgf"d("WPG.'E1"1gpqxc."8r4:226'Ocftif.'Urckp"cm'tkij uqtxgf+*'YqfHgd'3624<35<2 :"WVE*4246 nncfafirtknwnf"hnt'inntik:knkwwn'ah"VaeinnniceVik/hwcnfctf'rtaxkfof'di"CGPOTrPn"hwtvint'tartofwevkani"cwintklaf