Quick answer: ATA iSpec 2200 is an aviation specification that sets out how aircraft maintenance information is structured, written and exchanged. It builds on the ATA 100 chapter numbering you will see in every aircraft manual. S1000D is a different specification, built around small reusable data modules. Tech Pub job listings in Bangalore often name all of them, so a fresher needs to know what each one does and where it fits.
Open any Tech Pub job post. Somewhere in the skills list you will see a line like this: “Knowledge of ATA 100, iSpec 2200, S1000D and ASD-STE100.”
Four names. One breath. And nobody explains how they relate.
This guide does that in plain language, so you can walk into an interview and not freeze when someone says “iSpec 2200.”
First, why do standards exist at all?
An aircraft is maintained by thousands of people across airlines, MRO shops and manufacturers in many countries. They all need to find the same information in the same place, written the same way. Standards make that possible.
Without them, a manual from one manufacturer would look nothing like a manual from another, and a technician moving between aircraft would have to relearn how to find a torque value.
ATA 100: the chapter map
ATA 100 is the numbering system that divides an aircraft into chapters. Chapter 32 is landing gear. Chapter 24 is electrical power. Chapter 29 is hydraulic power. You will see these numbers at the start of nearly every page in a maintenance manual.
Think of it as a postal code for aircraft information. It tells you where a topic lives. We explain the numbers in detail in ATA chapter numbers explained.
ATA iSpec 2200: the rules for the content
ATA iSpec 2200 is a specification for aviation maintenance information. It keeps the ATA chapter structure, and it adds rules for how content is organised, how it is written in a structured format, and how it is exchanged between organisations.
In simple terms:
- ATA 100 tells you where information goes.
- iSpec 2200 tells you how the manual is built and how its content is structured.
Many Tech Pub teams work in an iSpec 2200 style, writing structured content in a tool such as Arbortext Editor. Some programmes use it for the main maintenance manuals and parts catalogues.
S1000D: the modular approach
S1000D is an international specification for technical publications. Instead of writing one long manual, you create small, self-contained pieces called data modules. Each module covers one task, one description or one parts list. They are stored in a common database and assembled into the publication when needed.
Why that matters:
- One data module can be reused in more than one publication.
- Updates are made once and flow through.
- It suits digital delivery, not only printed pages.
S1000D is widely used in defence and increasingly in civil aviation projects. If you want a deeper look, read S1000D training in India: what freshers need to know.
ASD-STE100: the writing rules
The fourth name in the list is not a manual structure at all. ASD-STE100 is Simplified Technical English, a controlled language with rules on vocabulary and sentence length so that procedures cannot be misread. We cover it in what it is and the rules freshers must know.
How they fit together
| Standard | What it does | Simple way to remember it |
|---|---|---|
| ATA 100 | Divides the aircraft into numbered chapters | The address |
| ATA iSpec 2200 | Sets rules for maintenance information structure and exchange | The building plan |
| S1000D | Builds publications from reusable data modules | The Lego bricks |
| ASD-STE100 | Controls how the words are written | The grammar rulebook |
Different customers and programmes choose different specifications. Your job as a Tech Pub author is to follow the one the project uses, and to be comfortable moving between them.
What this means if you are a fresher
- Learn all four by name. Interviewers use them as a quick filter.
- Know the difference in one line each. The table above is a good start.
- Practise on real manuals. Reading about a standard is not the same as authoring to it.
For the interview side of this, read what freshers are actually asked and what Tech Pub job listings really ask for.
How GLOINNT teaches this
GLOINNT’s Aerospace Technical Publications Training is a 3-month classroom programme in Bengaluru, Monday to Friday, 9:00 AM to 6:00 PM. The first module covers the Tech Pub process and the standards, ATA 100, iSpec 2200, S1000D and ASD-STE100, along with the main manuals and engineering drawings. The second module is hands-on, with Arbortext Editor for authoring and IsoDraw for illustrations, and the work is validated on a real aircraft.
The programme is open to BE/BTech graduates in Aeronautical or Aerospace Engineering, and AME (Mechanical or Avionics) candidates. We offer placement assistance in the aerospace domain, not a job guarantee. See what is inside the curriculum.
Frequently asked questions
Is iSpec 2200 the same as ATA 100?
No. ATA 100 is the chapter numbering system. iSpec 2200 is a broader specification that keeps that numbering and adds rules for content structure and exchange.
Do I need to learn both iSpec 2200 and S1000D?
Job listings often mention both, so it helps to know both. You will usually work in one at a time, depending on the project.
Is S1000D only for defence?
No. It started in defence and is also used in civil aviation projects.
Do I need to know the standards before I join a training programme?
No. A good programme teaches them from the start. You only need to meet the eligibility.
Who is eligible for the GLOINNT Tech Pub training?
BE/BTech graduates in Aeronautical or Aerospace Engineering, and AME candidates in Mechanical or Avionics. Check the eligibility, batch dates and how to apply guide.
Want to learn these standards hands-on?
Check the next batch, then fill in the form and our admissions team will call you with dates, seats and fees.
Prefer to talk first? Call +91 96062 64161 (Monday to Friday, 9:00 AM to 6:00 PM) or write to info@gloinnt.com.