What does it mean when a material is listed as meeting FAR 25.853?

It means the manufacturer states that the material, in the construction described on the document, was tested under a specified procedure and produced a stated result. It describes the material and the test configuration on that document. It does not describe your seat, your foam, your adhesive, your thread, your workmanship or your installation.

Does a burn certificate approve my aircraft interior?

No. A material test document supports a material selection and belongs in the job records. Approval of the completed interior — including foam, adhesive, seams, backing, installation and return to service — is determined by the A&P, IA, repair station, engineer or other responsible person against the approved data for that aircraft.

What else in an aircraft seat needs to be considered besides the cover?

Everything else in the assembly. Foam, fire blocking, adhesive, thread, backing and the seat structure each have their own requirements and their own documentation. A compliant cover on an undocumented foam is not a compliant seat, and the cover is usually the only part people check.

What is the accurate way to describe aviation upholstery material?

That the manufacturer lists it as meeting a specified flammability procedure, in a stated construction, with test documentation available. Not that it is FAA approved. The accurate shorthand protects both the buyer and the shop, because the inaccurate one implies an approval nobody issued.

How do I get burn documentation from Carolyn Fabrics?

Request it with your order. Manufacturer burn-test documentation is provided when requested at the time of ordering and may not be obtainable after the material has shipped, so ask for it up front rather than after the job is underway.

Which Appendix F test applies to aircraft upholstery vinyl?

Upholstery vinyl is a coated fabric, which falls in the 12-second vertical test group in Part I of Appendix F to Part 25 - the same group as textiles, upholstery, seat cushions and padding. The published criteria are an average burn length of no more than 8 inches, an average flame time after removal of the flame source of no more than 15 seconds, and drippings flaming no more than an average of 5 seconds.

What is the difference between the 12-second and 60-second vertical test?

They apply to different components and have different criteria. The 60-second vertical test covers interior ceiling and wall panels, partitions, galley structure, large cabinet walls and structural flooring, with an average burn length of no more than 6 inches and drippings flaming no more than 3 seconds. The 12-second test covers textiles, upholstery, coated fabrics, seat cushions and padding, at 8 inches and 5 seconds. A result under one says nothing about the other.

Are aircraft seat cushions covered by the same test as the cover?

No. Under 25.853 the cover material is evaluated under Part I of Appendix F, while seat cushions other than flight-crew seats are addressed by the requirements in Part II, which is a different and more demanding evaluation. This is what the fire-blocking layer in an aircraft seat is doing, and it is the layer most often lost when a seat is reupholstered as though it were furniture.

Does FAR 25.853 apply to every aircraft?

No. Part 25 governs transport-category airplanes. Many general-aviation aircraft are certificated under a different part, and rotorcraft under another again. Meets FAR 25.853 is widely used as generic shorthand for aviation flammability, but the applicable rule and certification basis for a specific aircraft is a question for the approving authority.

Is Upholstery Vinyl FAA-Approved? FAR 25.853 Explained

Q: Is upholstery vinyl FAA approved?

No — and the phrase is misleading. A material manufacturer may list a product under a flammability standard and supply test documentation, but approval of a finished aircraft interior is a separate determination made by the responsible aviation professional. There is no such thing as an FAA-approved roll of vinyl that is approved for any aircraft or installation.

Aviation upholstery guide

No, a roll of vinyl is not "FAA-approved." A manufacturer can list a material as meeting a flammability test procedure and supply test documentation for it. Approval of a finished aircraft interior is a separate determination made by the applicable approval authority for that specific aircraft and alteration. For upholstery material the relevant procedure is normally the 12-second vertical test in Part I of Appendix F to Part 25, and the pass criteria are an average burn length of no more than 8 inches, an average flame time after removal of the flame source of no more than 15 seconds, and any drippings flaming no more than an average of 5 seconds.

"FAA-approved vinyl" is common search language. It is misleading if it suggests a roll of upholstery is approved for any aircraft or installation.

What FAR 25.853 covers

14 CFR 25.853 sets compartment-interior flammability requirements for transport-category airplanes. Appendix F to Part 25 contains the test procedures, and which one applies depends on the material and the component.

Appendix F, Part I — the procedures and their published pass criteria
Test	Applies to	Criteria
12-second vertical	Floor covering, textiles including draperies and upholstery, seat cushions, padding, decorative and non-decorative coated fabrics	Average burn length ≤ 8 in; average flame time after flame removal ≤ 15 s; drippings flame ≤ 5 s average
60-second vertical	Interior ceiling and wall panels, partitions, galley structure, large cabinet walls, structural flooring	Average burn length ≤ 6 in; average flame time ≤ 15 s; drippings flame ≤ 3 s average
45-degree	Cargo and baggage compartment materials	Flame may not penetrate the material; flame time after removal ≤ 15 s; glow time ≤ 10 s
60-degree	Electrical wire and cable insulation	Average burn length ≤ 3 in; flame time ≤ 30 s; drippings flame ≤ 3 s average
Horizontal	Certain other listed materials	Average burn rate ≤ 2.5 in/min for listed items; ≤ 4.0 in/min for others

Upholstery vinyl is a coated fabric, which places it in the 12-second vertical group. That is why a material document for cabin vinyl or aviation leather normally reports a 12-second vertical result rather than a 60-second one. A 60-second result on a wall panel says nothing about a seat cover, and the reverse is equally true.

Seat cushions are tested separately, and that catches people out

The cover material and the cushion are not the same compliance question. Under 25.853, seat cushions other than flight-crew seats are addressed by the requirements in Part II of Appendix F, which is a different and more demanding evaluation than the vertical burn test applied to the cover fabric.

In practice this is what the fire-blocking layer in an aircraft seat is doing, and it is the layer most often lost during a reupholstery job done as if it were furniture work. A compliant cover over a cushion assembly that was quietly rebuilt without its blocking layer is not a compliant seat.

Carolyn Fabrics does not supply aircraft seat-cushion foam, and we do not sell aviation kits or bundles; Spirit Millennium vinyl is sold by the yard on its own. The cushion system is for the responsible aviation professional to specify.

Get the paragraph, not just the number

Two details cause avoidable arguments.

The paragraph lettering in 25.853 has changed across revisions. A citation written years ago and a citation written today can point at the same test through different subparagraph letters. When a specification, a document or an inspector cites a paragraph, confirm which revision is meant rather than assuming the letters match what is on your certificate.

Not every aircraft is certificated under Part 25. Part 25 governs transport-category airplanes. A great many general-aviation aircraft are certificated under a different part, and rotorcraft under another again. "Meets FAR 25.853" is frequently used as generic shorthand for aviation flammability across the whole industry, but the applicable rule and certification basis for your specific aircraft is a question for the approving authority, not an assumption to carry into an order.

What "listed as meeting" means

A manufacturer listing tells you what the manufacturer reports for the identified material. It is a starting point for project review. It is not an FAA design approval and does not replace the applicable approval authority's decision about the particular aircraft and alteration.

For Spirit Millennium, the manufacturer lists FAA FAR 25.853(a) among the material's flammability specifications. Required manufacturer burn-test documentation must be requested with the order and may not be available after shipment.

What the documentation can support

A useful material document identifies the product or construction, the cited test, and the reported result. It may support the approving person's review and project records. It does not prove that the complete seat or cabin installation is acceptable.

Before ordering, ask the A&P, IA, repair station, engineer, or other applicable approval authority:

Which aircraft rule and certification basis applies?
Which Appendix F procedure must represent the finished work?
Must the test represent the cover alone or the complete construction?
What material identification and records are required?
Will additional testing, witnessed testing, conformity or approved data be needed?

Do not forget the rest of the seat

The cover is one part of the construction. Cushion foam, fire-blocking layers, adhesives, thread, seams, substrates, and the alteration method may each have their own requirements. Weight matters too — a heavier material across a full cabin is a change somebody has to account for.

The accurate shorthand

Instead of saying "FAA-approved vinyl," say: Spirit Millennium is manufacturer-listed under FAA FAR 25.853(a), with required manufacturer burn-test documentation available when requested with the order. Then state the boundary: the installer and applicable approval authority determine acceptability for the specific aircraft and finished installation.

See the aviation upholstery vinyl guide for current ordering information.

Carolyn Fabrics supplies upholstery materials and manufacturer material-test documentation when requested with the order. We do not determine airworthiness or approve aircraft, seats, or finished installations.

Is Upholstery Vinyl "FAA-Approved"? FAR 25.853, Explained