FAA-STD-025f — Preparation of Interface Documentation
Source: FAA-STD-025f (US Government work, public domain) | Chapters: 6
When to use
Reach for this pack when authoring or reviewing Interface Requirements Documents (IRD) or Interface Control Documents (ICD) for FAA Enterprise Subsystems / NAS interfaces — including choosing IRD vs ICD, filling required outlines, specifying security/physical/power interface shalls, building a VRTM, or routing revisions under configuration management.
Prerequisites: none — plain Markdown; no MCP server, API key, or licence tier needed at runtime.
How to Use This Skill
- Without arguments — load the core frameworks below.
- With a topic — ask about IRD vs ICD, TBS, facility IRDs, VRTM, security shalls, power factors, or approval roles.
- With a chapter — ask for
ch01 through ch06.
Supporting files: glossary.md, patterns.md, cheatsheet.md.
Core Frameworks & Mental Models
IRD / ICD pair
| Artifact |
Answers |
Verb |
Baseline role |
| IRD |
What must the interface satisfy? |
shall |
FAA-controlled requirements baseline |
| ICD |
How is it implemented / as-built? |
is/are |
Developer deliverable design record |
Facility interfaces: IRD only (no ICD). Orphan ICDs (no parent IRD) must carry both shall and is/are — discouraged.
Interface-type outlines
Use the standard decision tree, then the matching TOC:
- Facility / analog / discrete family
- General service / web service family
Shared rules: front matter, explicit N/A, incorporation by reference, TBS only where allowed.
Common technical spine
- Scope template + responsibility lists
- Referenced documents (versioned, accessible, tailored)
- Functions / demarcation / security / physical / power
- Type-specific protocol or facility slots
- Verification responsibility + VRTM (1:1 with shalls)
Verification levels
Subsystem/Service (Development) → Integration → Site. SEM T&E guidance tailored into the VRTM; special conformance/interoperability for ATN/IPS.
CM and timing
- Start IRD early; before SOW finalization when used in procurement.
- Approve IRD before ICD when both required.
- Revise by superseding full document under FAA Order 1800.66 (no legacy side "Interface Revision" form).
- Facility IRD maturity: Initial → Primary → Intermediate → Final.
Chapter Index
| # |
Section |
Key content |
| ch01 |
Scope and Document Family |
FESS applicability, IRD vs ICD, TBS, baselining |
| ch02 |
General Format and Common Content |
Outlines, front matter, scope templates, references |
| ch03 |
IRD Content Requirements |
Functional/security/physical/power and typed IRDs |
| ch04 |
ICD Content Requirements |
Design characteristics, as-built, orphan ICD rule |
| ch05 |
Verification and Traceability |
VRTM, levels, methods, ATN/IPS special tests |
| ch06 |
Revisions, CM, and Approval |
1800.66 revisions, roles, facility iterations |
Topic Index
- Analog / discrete interfaces → ch01, ch03, ch04
- Application process / protocols → ch03, ch04
- As-built / form-fit-function → ch01, ch04
- Configuration Management / Order 1800.66 → ch02, ch06
- Demarcation point → ch03
- Facility IRD (no ICD) → ch01, ch03, ch06
- Front matter / TOC outlines → ch02
- Interface Control Document (ICD) → ch01, ch04
- Interface Management → ch01, ch06
- Interface Requirements Document (IRD) → ch01, ch03
- Interface Working Group roles → ch06
- N/A and TBS language → ch01, ch02
- Power / connectors / grounding / EMC → ch03, ch04
- Requirements Traceability / VRTM → ch05
- Security requirements at interfaces → ch03, ch04
- Service / web service interfaces → ch03, ch04
- Verification levels (dev/integration/site) → ch05
- Verb discipline (shall vs is/are) → ch01, ch04
Supporting Files
- glossary.md — IRD/ICD and interface terms
- patterns.md — implementation patterns with When/How/Trade-offs
- cheatsheet.md — decision rules, maps, tells & smells
Scope & Limits
This pack covers FAA-STD-025f (November 30, 2007) — Preparation of Interface Documentation — as synthesized reference notes from the everyspec mirror of Rev F (64 pages per extraction metadata). It does not cover: full text of FAA-STD-005 / FAA-STD-002 / FAA-G-2100; the complete FAA Order 1800.66 CM procedure set; non-FAA interface control standards (e.g., generic MIL ICD practices beyond this FAA standard); or program-specific IRD/ICD instances. US Government public domain work. No source-material download link is published.
1---2name: faa-std-0253description: Knowledge base from FAA-STD-025f (Preparation of Interface Documentation). Use for IRD/ICD family definitions, common format and content, IRD shall-requirements, ICD design characteristics, verification/VRTM, and CM/revision/approval of FAA Enterprise Subsystem interfaces. Covers rev F preparation rules only; does not replace FAA-STD-005 drawing/spec prep, Order 1800.66 full CM procedures, or non-FAA interface standards.4---56<!-- argument-hint: [topic, document type, or chapter number] -->78# FAA-STD-025f — Preparation of Interface Documentation9**Source**: FAA-STD-025f (US Government work, public domain) | **Chapters**: 61011## When to use12Reach for this pack when authoring or reviewing **Interface Requirements Documents (IRD)** or **Interface Control Documents (ICD)** for FAA Enterprise Subsystems / NAS interfaces — including choosing IRD vs ICD, filling required outlines, specifying security/physical/power interface shalls, building a VRTM, or routing revisions under configuration management.1314**Prerequisites:** none — plain Markdown; no MCP server, API key, or licence tier needed at runtime.1516## How to Use This Skill17- **Without arguments** — load the core frameworks below.18- **With a topic** — ask about IRD vs ICD, TBS, facility IRDs, VRTM, security shalls, power factors, or approval roles.19- **With a chapter** — ask for `ch01` through `ch06`.2021Supporting files: `glossary.md`, `patterns.md`, `cheatsheet.md`.2223## Core Frameworks & Mental Models2425### IRD / ICD pair26| Artifact | Answers | Verb | Baseline role |27|----------|---------|------|---------------|28| IRD | What must the interface satisfy? | shall | FAA-controlled requirements baseline |29| ICD | How is it implemented / as-built? | is/are | Developer deliverable design record |3031Facility interfaces: IRD only (no ICD). Orphan ICDs (no parent IRD) must carry both shall and is/are — discouraged.3233### Interface-type outlines34Use the standard decision tree, then the matching TOC:35- Facility / analog / discrete family36- General service / web service family3738Shared rules: front matter, explicit N/A, incorporation by reference, TBS only where allowed.3940### Common technical spine411. Scope template + responsibility lists422. Referenced documents (versioned, accessible, tailored)433. Functions / demarcation / security / physical / power444. Type-specific protocol or facility slots455. Verification responsibility + VRTM (1:1 with shalls)4647### Verification levels48Subsystem/Service (Development) → Integration → Site. SEM T&E guidance tailored into the VRTM; special conformance/interoperability for ATN/IPS.4950### CM and timing51- Start IRD early; before SOW finalization when used in procurement.52- Approve IRD before ICD when both required.53- Revise by superseding full document under FAA Order 1800.66 (no legacy side "Interface Revision" form).54- Facility IRD maturity: Initial → Primary → Intermediate → Final.5556## Chapter Index57| # | Section | Key content |58|---|---------|-------------|59| [ch01](chapters/ch01-scope-and-document-family.md) | Scope and Document Family | FESS applicability, IRD vs ICD, TBS, baselining |60| [ch02](chapters/ch02-general-format-and-common-content.md) | General Format and Common Content | Outlines, front matter, scope templates, references |61| [ch03](chapters/ch03-ird-content-requirements.md) | IRD Content Requirements | Functional/security/physical/power and typed IRDs |62| [ch04](chapters/ch04-icd-content-requirements.md) | ICD Content Requirements | Design characteristics, as-built, orphan ICD rule |63| [ch05](chapters/ch05-verification-and-traceability.md) | Verification and Traceability | VRTM, levels, methods, ATN/IPS special tests |64| [ch06](chapters/ch06-revisions-cm-and-approval.md) | Revisions, CM, and Approval | 1800.66 revisions, roles, facility iterations |6566## Topic Index67- **Analog / discrete interfaces** → ch01, ch03, ch0468- **Application process / protocols** → ch03, ch0469- **As-built / form-fit-function** → ch01, ch0470- **Configuration Management / Order 1800.66** → ch02, ch0671- **Demarcation point** → ch0372- **Facility IRD (no ICD)** → ch01, ch03, ch0673- **Front matter / TOC outlines** → ch0274- **Interface Control Document (ICD)** → ch01, ch0475- **Interface Management** → ch01, ch0676- **Interface Requirements Document (IRD)** → ch01, ch0377- **Interface Working Group roles** → ch0678- **N/A and TBS language** → ch01, ch0279- **Power / connectors / grounding / EMC** → ch03, ch0480- **Requirements Traceability / VRTM** → ch0581- **Security requirements at interfaces** → ch03, ch0482- **Service / web service interfaces** → ch03, ch0483- **Verification levels (dev/integration/site)** → ch0584- **Verb discipline (shall vs is/are)** → ch01, ch048586## Supporting Files87- [glossary.md](glossary.md) — IRD/ICD and interface terms88- [patterns.md](patterns.md) — implementation patterns with When/How/Trade-offs89- [cheatsheet.md](cheatsheet.md) — decision rules, maps, tells & smells9091---9293## Scope & Limits94This pack covers **FAA-STD-025f (November 30, 2007)** — Preparation of Interface Documentation — as synthesized reference notes from the everyspec mirror of Rev F (64 pages per extraction metadata). It does **not** cover: full text of FAA-STD-005 / FAA-STD-002 / FAA-G-2100; the complete FAA Order 1800.66 CM procedure set; non-FAA interface control standards (e.g., generic MIL ICD practices beyond this FAA standard); or program-specific IRD/ICD instances. US Government public domain work. No source-material download link is published.
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