FEEC Study Guide 2026: How to Pass on Your First Attempt

What You're Actually Preparing For

FEEC here means Fiber Optics Evaluation & Endface Cleaning, an aerospace fiber optics certification issued by ETA International. If you are still orienting yourself, the explainers on what FEEC is and what FEEC stands for cover the basics. This guide assumes you have decided to pursue it and want a practical route to passing on the first sitting.

The first thing to understand is that FEEC is not a single test. It has two parts: a proctored knowledge examination, and a separate hands-on training and skills component that must be handled through an ETA-approved school. Passing the written portion alone does not complete the credential. A study plan that only drills practice questions will leave you short.

The second thing to understand is that the technical content is aviation-specific. This is not a general datacom fiber exam. The vocabulary, connector families and test methods come from aircraft fiber optic practice, so generic structured-cabling knowledge helps with fundamentals but will not carry you through the connector and inspection material.

Exam Mechanics: Fee, Questions, Time and Scoring

Knowing the logistics removes avoidable surprises. Here is what is documented for the knowledge exam:

A few cautions. The exam fee is not an all-in price: required training from an approved provider is a separate cost unless that provider explicitly bundles it. For a fuller breakdown, see the FEEC certification cost guide. Also, ETA does not publish how many of the 25 items are scored, so do not try to calculate a minimum number of correct answers. Aim to know the material, not to engineer a cutoff. The FEEC passing score article explains what is and is not known about scoring.

Finally, public sources do not confirm the precise item format, such as whether every question is single-answer multiple choice. Treat any practice material that claims to replicate an official format with skepticism, and focus on understanding concepts well enough to answer in any reasonable format.

The Training Requirement Comes Before the Exam

FEEC requires an ETA-approved hands-on training course. This is the most important structural fact for planning, because it determines your timeline. You cannot simply register for the exam, study for a month and walk in. The required practical training has to run through an approved school.

FEEC is a stand-alone credential. An Associate CET is not a universal prerequisite, and no mandatory degree, employment-hour threshold or reference count was verified as an initial eligibility requirement. For more on qualifying, read the FEEC requirements guide, and for course considerations see the overview of FEEC training.

ETA names KITCO as an external training provider for FEEC. KITCO states that completing its knowledge competencies and hands-on skillsets qualifies students to sit the FEEC examination. Its course materials list equipment you should expect to handle: optical light source and power meters, a visual fault locator, video inspection probes, and 400x and 200x microscopes. Whichever approved school you choose, confirm what equipment you will touch, because hands-on fluency with these instruments is exactly what the skills component rewards.

The Source Standard: ARINC 805-5 and Its Companions

ETA's current FEEC page bases the certification mainly on ARINC Report 805-5 (fiber optic test procedures), with aspects of 803-3, 806-7.2.1 and 807-4. SAE's landing page dates ARINC 805-5 to January 28, 2019. The full standards are paid documents and were not part of the public material reviewed here, so there is no public syllabus to memorize line by line.

What this means practically: the knowledge exam is anchored in the vocabulary and procedures of aerospace fiber optic test and inspection practice. Your approved training course is your primary window into that content. Use the course materials as the backbone of your review, and treat any older reference to a different revision of one of the companion reports as historical rather than something to study.

Domain 1: Aviation Fiber Optic Theory and Fundamentals

This first area establishes the language you need for everything else. It is the least hands-on of the three, which makes it the best place to build confidence early. For a wider view of how the areas fit together, see the FEEC exam domains guide.

Do not skim this area on the theory that it is "just background." Fundamentals questions are often where candidates who relied only on practical shop experience lose points, because experience teaches you what to do without always teaching the precise terminology the exam uses. Tie each concept back to the hands-on skills you practice in training so the definitions stick.

Domain 2: Inspection and Cleaning Practices

This is the heart of the credential, and it is why "Endface Cleaning" is in the name. The provider scope for this area is specific: single ferrule connectors and termini, multi-terminus connectors such as D38999, ARINC 600 and EPX, and the use of the fiber optic video inspection probe (FOVIS).

Because this area is so hands-on, the best preparation is repetition on real hardware during your approved training. For the knowledge exam, practice describing, in plain language, what you would do and why at each step. If you can narrate the process for a D38999 connector, an ARINC 600 connector and a single ferrule termini without hesitating, you are in good shape. Microscopes at 200x and 400x appear in the provider equipment list, so be comfortable explaining what each magnification is used to evaluate.

Domain 3: Testing Theory, Link Loss and Troubleshooting

The third area covers testing theory and practices, including link loss testing and troubleshooting procedures and best practices. The instruments in the provider equipment list tell you what to expect: an optical light source and power meter pair for loss measurement, and a visual fault locator for tracing faults.

A recurring theme across this credential is that inspection and cleaning come before conclusions. A failing loss measurement is very often an endface problem, not a failed fiber. Expect the exam to reward candidates who connect Domain 2 and Domain 3: if a link tests poorly, the disciplined first move is to inspect and clean before blaming anything else. Practicing that reasoning chain pays off across both areas.

A Domain-Sequenced Study Schedule

Generic study advice is less useful than a sequence tied to this content. Because the hands-on training is a required gate, build your schedule around it rather than treating it as an afterthought. The plan below assumes you have already enrolled with an ETA-approved school; adjust the pacing to fit your provider's course dates.

Why this order? Theory first gives you the vocabulary to make sense of the hardware work. Inspection and cleaning get the longest block because they are central to the credential and hardest to learn from reading alone. Testing comes after, because troubleshooting logic builds directly on knowing what a clean, well-inspected connection looks like. Run timed practice questions from the FEEC practice test throughout, not only at the end, so you learn your weak areas while there is still time to fix them.

Exam Day, Retakes and Keeping the Certification

What to bring and what to expect

ETA requires photo ID and proctoring. Its general onsite FAQ allows scratch paper and non-programmable or scientific calculators, prohibits personal electronic devices, and requires used scratch paper to be handed in. If you take the exam through a remote arrangement, confirm remote-specific permissions with the delivery arrangement rather than assuming the onsite rules apply. No FEEC-specific open-book or adaptive-testing status was verified, so plan to rely on what you know.

Scheduling depends on your provider and test-site arrangements, so check the details in the FEEC exam dates guide and ETA's test-site information before you commit to a date.

If you do not pass

ETA states that one free retake is available within one year of the first session, under its stated conditions. That is a safety net for the exam attempt, not a promise of free repeat tuition or waived remote charges, so do not assume extra training or proctoring fees disappear. Treat the first attempt as the real target. For a sense of how demanding the exam is, see how hard the FEEC exam is, and note that ETA does not publicly disclose a pass rate, as discussed in the FEEC pass rate article.

Validity and renewal

The current certification term is two years. ETA's FEEC-specific maintenance section says people who perform the certified job at least 60% of a full-time work year renew annually using an employer proficiency affidavit, while others must recertify, and failing the recertification practical means training again. However, the linked renewal form says below-60% workers' certification expires after one year, which conflicts with the web text saying all certifications are good for two years. That discrepancy is unresolved in the issuer sources, so confirm your exact renewal path directly with ETA. The renewal form lists a $50 fee, though its revision date is uncertain. No FEEC-specific numeric continuing-education hour requirement was verified.

Where the Credential Gets Used

FEEC is aimed at people who inspect, clean and test fiber optic connections in aerospace environments, which includes the flight line and aircraft maintenance settings that the provider course targets. Employers in aviation maintenance, avionics installation and aircraft integration have a direct interest in technicians who can demonstrate competence with these procedures. No specific job-market data was verified for this guide, so check current listings for roles that mention aerospace fiber optic inspection and testing, and see the discussion of FEEC jobs. For a view on value, the FEEC ROI analysis weighs the investment, and the FEEC salary guide covers earnings context. As with all of these, treat any specific salary figure you see elsewhere with caution unless it cites a verifiable source.

Frequently Asked Questions

For a broader introduction to the credential, you can also read about FEEC certification, or return to the main practice test site to start drilling questions across all three content areas.