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AASSEP-14
Manufacturers and ground crews responsible for aircraft cabin pressure-test connections under a NATO nation's procurement instructions
AASSEP-14 is the NATO standard defining the aircraft ground-test, canopy seal inflation and test gauge connections that let member nations cross-service each other's aircraft.
AASSEP-14 is a NATO Allied Aircraft Servicing and Standard Equipment Publication (AASSEP) - engineering agreements NATO nations use to make ground-support equipment for aircraft interchangeable. Edition A, Version 1 was promulgated in February 2025. It standardises three things: the ground-test connection for a pressurised aircraft cabin, which must conform to the existing civil standard ISO 11:1987; the canopy seal inflation connection; and the test pressure gauge connection. Alongside the connections themselves, it fixes the access clearance a ground crew needs to reach them. The point of all three is cross-servicing: an aircraft built or operated by one NATO nation can be tested, pressurised and inspected using another nation's standard ground equipment, without a bespoke adapter built for that airframe alone.
Nations record their agreement to use AASSEP-14 in STANAG 3315, which is the cover this publication sits under. The full dimensional drawing for the canopy seal and test-gauge connections is in Annex A; a supplier builds to that drawing rather than to a description of it.
AASSEP-14 is addressed to NATO nations, not to a supplier directly. It becomes live for a nation once that nation has issued its own instructions that future aircraft and cabin air conditioning equipment will be built to it, so the document reaches a manufacturer through a national procurement specification or a tender, not by existing on its own. That makes it a design-stage matter: the connections are cheapest to include when an aircraft or its ground test equipment is first specified, and expensive to retrofit once the design is fixed.
The national reservations recorded against this edition are a useful check on how far that reach actually goes. Finland and Slovenia both reserve the right to leave equipment they have already procured as it is, rather than modify it to match. Slovenia adds that meeting the standard on future procurements depends on whether its manufacturers, who are all foreign, are able to comply with it. Greece notes that several of its current aircraft and helicopter types are not compatible with the related standard STANAG 2215 Edition 9, an interoperability point AASSEP-14 itself does not raise. None of this makes the standard optional where a contract invokes it; it shows where nations have chosen not to apply it retroactively.
Two separate requirements sit inside AASSEP-14, and they are easy to conflate. The pressurised aircraft's own ground-test connection has to conform to ISO 11:1987, a civil aviation standard for ground pressure testing connections on pressure cabins, so it couples with any nation's standard ground pressurising equipment. The canopy seal inflation connection and the test pressure gauge connection are AASSEP-14's own specification: each is a defined tubing and thread size, set out in Annex A's drawing rather than described in the clause text. A design or procurement record showing conformance to that drawing, and to ISO 11:1987 for the pressurised-cabin connection, is what a customer or an internal audit will ask to see.
A separate clause on defence against terrorism sits alongside the connection requirements: the equipment has to be labelled, processed and stored so it cannot be accessed or tampered with by unauthorised people, inspected and certified before use, and serviced or maintained only by authorised personnel. It is a handling and access-control requirement, not a technical property of the connection itself.
AASSEP-14 names no certifying body and no accreditation scheme. It does require the equipment to be inspected and certified before use, but that is a check on the physical item, comparable to an airworthiness or serviceability check, not a credential an organisation can hold. In practice, whether a delivered aircraft or piece of ground equipment meets AASSEP-14 is something the procuring nation checks at acceptance, against Annex A's drawing and against ISO 11:1987, rather than something assessed by a third party.
NATO publishes AASSEP-14 through the NATO Standardization Document Database at no charge. ComplyTrain does not sell it or host a copy; the NSDD listing for AASSEP-14 is the source.
AASSEP-14 is an interface standard, and the work of meeting it happens on the shop floor and the drawing board, not in software: designing or sourcing a connection to Annex A's tolerances, building the pressurised-cabin connection to ISO 11:1987, and running the labelling, storage and authorised-personnel regime the defence-against-terrorism clause describes.
What ComplyTrain supports is the record-keeping that sits around that work: version-controlled design and procurement records that show a connection was built to Annex A and ISO 11:1987, the national implementing instruction that put the requirement in play, and the access-control and authorised-personnel records the standard implies - who handled the equipment, who inspected and certified it, who serviced it, and when. Those are the records a procuring authority or an internal audit actually asks for.
ComplyTrain does not design the connection, gauge a physical part against Annex A's tolerances, or certify or inspect the equipment itself. Which standards apply to a given programme, and on what timeline, is set by the contract and the customer's quality clause, not by us. See the standards explorer for what sits alongside AASSEP-14, including STANAG 3315 and STANAG 2215, or talk to us about the documentation and training side of meeting it.
Tell us how you need to work with AASSEP-14 and what you need from it. We will come back to you about what ComplyTrain can do.
Thank you. Your list is on its way to your inbox, and we will come back to you on what working with these standards in ComplyTrain involves, usually within one business day.
AASSEP-14 binds a nation once that nation has issued instructions that future aircraft and cabin air conditioning equipment will be built to it, and nations record their agreement to use it in STANAG 3315. Whether it reaches a particular supplier depends on whether a specific tender or contract requires the connections it defines, not on the document existing.
No. The document names no certifying body and no accreditation scheme. It does require the equipment itself to be inspected and certified before use, but that is a check on a physical item before it enters service, not a credential an organisation can hold.
Two connections and a clearance requirement: the aircraft's own ground-test connection for a pressurised cabin, which has to conform to ISO 11:1987, and the canopy seal inflation and test pressure gauge connections, which are AASSEP-14's own design set out in Annex A. It also fixes the access clearance a ground crew needs to reach them.
STANAG 3315 is the agreement by which nations commit to use AASSEP-14; it is the cover this publication sits under. STANAG 2215 is a separate, related interoperability standard: it appears in this edition only in Greece's reservation, which lists aircraft and helicopter types not compatible with it, and AASSEP-14's own requirements do not invoke it.
NATO publishes it free of charge through the NATO Standardization Document Database. ComplyTrain does not sell or host copies of NATO documents.
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