Trail

Part number family

HYDRAUNYCOIL FH 51

NYCO/STPC

One manufacturer designation, every identity it carries: 1 qualified specification line, 2 approved sources, 22 related parts on the same specification.

Purchasable unitnone recorded
You are here · Part numberHYDRAUNYCOIL FH 51
Stock numbernone recorded
Specification →MIL-PRF-5606 Type MIL-PRF-5606

Codified — the stock numbers

No stock number of its own is recorded — but the maker's own range is partly codified, and the catalogue record (characteristics, approved sources) lives there. A sibling is a different dimension of the same product line, not a substitute.

siblingTURBONYCOIL 600 1-QT — NSN 9150-01-689-5853FLIS
siblingTURBONYCOIL 600 55-GL — NSN 9150-01-689-5677FLIS

Qualified / codified — the specifications

Each membership renders with its citation; references the public page cannot cite stay a count, released in the Stage 1(a) dossier.

MIL-PRF-5606 Type MIL-PRF-5606 · CONFIRMED

Approved sources — 2 makers of this exact part

One part number, several qualified manufacturers, listed against it by the airframer. These are interchangeable by the source's own statement — not a similarity score of ours.

NYCO/STPC

Listed

NYCO

Listed

Also on this specification — related, not interchangeable

Other designations qualified to the same line. A different size or class on one document is a NEIGHBOUR, not a substitute — ABS5093B25 (25 mm) and ABS5093B485 (485 mm) share a specification and are not swaps for each other. Each names the line that vouches for it.

Take the family with you

The qualified line's family as a CSV — designations, grading, identifiers and the citation behind each row. Metered per address.

Export paused

The monthly allowance for this address is used — the pattern reads as catalogue work, not a line to settle.

Whole-catalogue work is what Stage 1(a) is for: every line human-checked against the cited evidence, discrepancies annotated, back inside 24 hours. Free searching stays free — this gate only catches bulk pulls.

Request a Stage 1(a) dossierTriage the whole list free
Staying inside the regulation — routes from candidate to approved

Codification and qualification say who vouches for a part — they are not installation eligibility. Under EASA Part-21, eligibility flows from the approved design (type design / IPC) or an approved change; under Part-145, acceptance needs an EASA Form 1 or, for genuine standard parts, conformity traceable to the officially recognised standard (145.A.42).

  1. Classify the part. Is it a GENUINE standard part? If the IPC/CMM references only a public specification (AN/MS/NAS/SAE-AS/ISO/EN) with no OEM source-control drawing, buy at source with conformity traceable to that standard.
  2. Check for an approved alternate. The IPC/CMM/vendor list may already carry an alternate part number or vendor code — an already-approved alternate needs no new approval.
  3. Ask the design approval holder. Request the source-control data, written equivalence, or addition of the alternative source to the approved data. Document a refusal.
  4. Raise a design change. Via a Part-21J DOA (or EASA/ADOA): a 21.A.95 minor change adding the alternate to the approved data, backed by an identicality/equivalence file — dimensions, material, class, load rating, lubricant/seal, corrosion protection, acceptance criteria. Critical applications escalate to major change/STC.
  5. FAA-PMA / BASA path. Where the product is also FAA-certificated: PMA parts reach EASA aircraft under the BASA/TIP (non-critical directly; critical via EASA-validated STC).
  6. Production, release, traceability. Approved parts are produced under a POA, released on an EASA Form 1 (marked EPA where applicable), with EN/AS 9120-grade traceability into Part-145/CAMO acceptance.

Stage 1(a): we assemble the equivalence/identicality starter file — the cited evidence this graph holds, shaped for your DOA or compliance department to take forward. See pricing.

Regulatory explainer, not legal advice: paragraph numbers, derogations and the BASA/TIP revision change — verify against the current consolidated Regulation (EU) 748/2012, the EASA Easy Access Rules and the current TIP, and engage your DOA and competent authority early.

This crosswalk identifies candidate equivalents with cited evidence. It is not an airworthiness approval. Substitution decisions remain subject to your organisation’s procurement and engineering approval process and the governing maintenance data (AMM/CMM/SRM/CML/OMAT).