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Quick summary

A listing on a parts marketplace carries two different countries, and they sit in two different fields. One says where the unit was manufactured. The other says where it is physically sitting today. They are not the same answer, and the second one is the one that decides your freight bill and your clearance path. On three of the four catalogue pages we read on 26 October the two countries were different — American-made stock held in India, American and French stock held in the United Arab Emirates — and on one page they matched. This note sets out what each field decides, and what to ask when the second one is blank.

Two fields, two decisions

The aircraft parts country of origin is a manufacturing fact. It is fixed when the unit is built, it never changes, and it is the figure that goes on a commercial invoice and on a certificate of origin. It is what a tariff preference is assessed against, and it is the starting point for whichever export-control regime applies to the seller.

Where the unit is held is a commercial fact, and it changes every time the stock moves. It decides the freight lane, the transit time, the customs regime the shipment meets on the way out, and whether the seller can lawfully ship to your country at all. A unit built in Toulouse and held in Sharjah is a Gulf shipment with a French origin on the paperwork. Reading only the first field puts you on a European freight plan for a part that is four hours away.

Both fields are on the record. The mistake is not that the information is hidden — it is that the two are read as one.

What we measured

Four pages of 100 listings each, taken from different parts of the catalogue on 26 October 2026, when the catalogue held 7,576 entries. Every row below carries a control sum: the named values add up to the number of positions on the page, so the share of blank entries is measured rather than assumed.

Catalogue page	Made in	Held in	Control sum
Newest page	United States 94, France 6	United Arab Emirates 100 — Abu Dhabi 94, Dubai 6	100 of 100
Page 20	United States 100	India 100	100 of 100
Page 60	China 100	China 100	100 of 100
Last page, 76 entries	Other 59, Kazakhstan 11, United States 5, United Kingdom 1	United Arab Emirates 12, United States 1, Canada 1, blank 62	76 of 76

Each row is one page out of seventy-six. Read it as what to expect on that page, not as a figure for the catalogue as a whole — the pages differ from each other more than any average would suggest, which is the point of measuring four of them rather than one.

Three things come out of the table. The manufacturing country was present on every one of the 376 listings we read, on all four pages. The holding country was present on all 300 listings on the three earlier pages and absent on 62 of the 76 on the last one. And on the newest page the pairing was exact: the six French-built units were the six held in Dubai, and the ninety-four American-built units were the ninety-four held in Abu Dhabi.

A page is one seller’s consignment, and that is useful

On each of the three full pages the holding country took a single value — one country, usually one city, for all one hundred listings. That is what an inventory upload looks like: a stockholder lists a tranche, and the tranche lands together.

The practical use is this. If you find one unit you want and the surrounding listings share its holding location, you are looking at a stock you can draw more than one line from, and a single shipment from a single origin is materially cheaper than the same parts gathered from three continents. Ask whether the other items you need are in the same consignment before you accept three separate freight quotes. The same reasoning applies in reverse to a package request: our note on routing parts through regional hubs sets out how the physical path changes the landed number.

A blank holding field is a question, not a location

On the last page of the catalogue, 62 of 76 listings carried no holding country at all. Those are older entries, and the absence tells you nothing about where the unit is — only that nobody filled the field in. Treat it as the first question in your enquiry rather than as a reason to skip the listing.

The manufacturing field has its own version of the same trap, and it is less obvious because the field is not empty. On that last page, 59 of the 76 entries gave the country as Other. That is a value, not an answer: it passes any check for completeness and tells a buyer nothing. A field can be populated and still be uninformative, and a completeness count alone will not distinguish the two — which is why the table above lists the values rather than just the fill rate.

So: one question for a blank field, and the same question for a field that says Other. Which airport does the unit leave from, and what will the invoice state as the country of origin? Those are two answers, and a seller who holds the part has both.

Why the invoice answer matters separately

The origin on the invoice is not a formality. Where a national tariff gives preferential treatment by origin, it is assessed against that figure, and a certificate of origin may be required to claim it. It is also what an export-control classification attaches to on the seller’s side, and that classification belongs to the exporter, not to you. A seller who can state both the origin and the export classification in the first reply is a seller whose shipment will not stall.

What the border then wants to see is a separate list, and we have set it out line by line in our guide to the customs documents that clear an aircraft part. The point here is narrower: the number on that paperwork comes off a different field of the listing than the one that decides your freight, and both need to be read.

Two more fields on the same record

Two flags we had not measured before turned up in the same pass, and both are worth knowing because they change what a line is.

A whole-aircraft flag was set on 4 of the 76 entries on the last page and on none of the 300 on the earlier three. Those lines are airframes, not components, and a request written as if they were parts will read oddly to the seller. A universal-fitment flag was set on 2 of the 100 entries on page 20 and on none of the other 276. Both flags were present on every listing we read, so a flag that is not set means not-set rather than not-stated — the opposite of the holding-country field, and a reminder that blankness in a structured record has to be checked field by field rather than assumed. Our note on the commercial terms printed on a listing goes through the fields that carry the return window and the stock status, and the difference between aircraft parts and ground support equipment covers the other line-level distinction that catches buyers out.

What to put in the enquiry

Four questions, and they cost one message:

• Which city and country does the unit ship from today? Not where the company is registered — where the box is.
• What will the invoice state as the country of origin, and can you supply a certificate of origin? One answer for the tariff, one for the file.
• What is the export classification, and does it need a licence to my destination? The seller owns this answer; a seller who cannot give it has told you something.
• Are other items from my list in the same consignment? One shipment beats three.

Put those alongside the fields that make a quote possible at all — part number, quantity, condition accepted, release required, destination, need-by date — which we set out in full in our guide to writing a first enquiry to an overseas supplier.

Reading the catalogue for location

If you are sourcing across a border, the aircraft parts country of origin and the location the unit ships from are two separate lines of your own file, and keeping them separate is most of the work. You can read both on any listing in the Aviatrading parts catalogue, or state your destination once and let holders of the part answer with their own location by posting a request. New listings and open requests are posted as they appear on the Aviatrading channel on Telegram.

All figures above were read from the public catalogue on 26 October 2026, when it held 7,576 entries, across four pages of listings. Pages were chosen from different parts of the catalogue and each count carries a control sum against the number of positions on its page. Catalogue contents change daily; check the current listing rather than this table.