What Is an IA Rating for Aircraft Mechanics?

If you’re asking what is an IA rating for aircraft mechanics, you likely already hold or are working toward an Airframe and Powerplant (A&P) certificate and wondering what sits above it. The inspection authorization (IA) is the FAA authorization layered on top of your A&P that determines who can legally sign off an annual inspection, approve major repairs for service return, and take on inspection authority in general aviation maintenance.

What Does IA Mean in Aviation Maintenance?

IA stands for inspection authorization. It is not a separate mechanic certificate. It is an authorization the FAA issues under 14 CFR § 65.91 to eligible A&P mechanics. Without it, specific approvals are off-limits regardless of experience or tenure.

Under § 65.95, only an IA holder can:

• Sign off an annual inspection
• Approve an aircraft for return to service after major repairs or alterations
• Perform or supervise progressive inspections

Every general aviation aircraft that goes through an annual has an IA’s signature behind the return to service. No IA, no sign-off.

Can Any A&P Mechanic Sign Off an Annual?

No, and this is where many people get tripped up. A standard A&P covers a wide range of maintenance authority, but it does not include the right to approve return to service after an annual inspection. That authority belongs exclusively to IA holders.

Here’s how the privileges compare:

A 100-hour inspection covers the same scope as an annual but cannot substitute for one. The annual sign-off requires an IA, full stop. The FAA has been explicit on this distinction since the regulations were written.

Do You Need an IA to Work on Aircraft?

No. Most day-to-day aviation maintenance falls within A&P privileges. Routine maintenance, component repairs, and 100-hour inspections are all A&P territory. The IA only becomes a legal requirement when the work involves signing off an annual inspection or approving return to service after a major repair or alteration. Most entry-level and mid-career mechanics work entirely within A&P privileges and build toward the IA over time.

How to Get an IA Certificate as an Aircraft Mechanic

The FAA sets eligibility requirements under § 65.91. To qualify, you must:

• Hold an A&P with both airframe and powerplant ratings, each active for at least 3 years
• Have been actively engaged in maintaining certificated aircraft for the 2 years prior to applying
• Have a fixed base of operation where you can be reached during normal working hours
• Have access to current equipment, facilities, and inspection data
• Pass the FAA IA knowledge test with a score of 70 or above

Once you confirm eligibility, schedule an interview at your local Flight Standards District Office (FSDO) and bring a completed FAA Form 8610-1. The FSDO endorsement to sit the test expires in 30 days, so test promptly after you receive it. If you fail, you must wait 90 days before retesting.

How Long Does It Take to Get an IA Rating?

At a minimum, three years after earning your A&P, since that’s the eligibility floor. Most mechanics wait longer to build the hands-on experience the FSDO interview expects. Field time doing actual maintenance on certificated aircraft is what the FAA looks for, not years on paper alone. A passing test score is valid for 24 months. Once issued, the IA must be renewed annually by March 31, with biennial status reporting to the FAA.

Is an IA Rating Worth It?

For mechanics working in general aviation, independent shops, or operations where annual inspections are routine, yes. An IA rating lets you take on annual inspection clients independently, qualify for lead and quality assurance roles that often require IA ,and is a credential that some employers factor into compensation decisions, though pay varies by employer and role. Beyond that, the IA can signal to employers that you’ve logged real field time and passed a federal knowledge benchmark, a combination that an A&P alone does not demonstrate.

The IA path starts with your A&P. AIM’s Aviation Maintenance Technician program trains students to sit for FAA certification and introduces the hands-on foundation that aviation maintenance careers require. If you’re ready to take the first step, request information to learn more about getting started.