Why Pilots Get Stuck at ICAO Level 4 — and How to Improve Toward Level 5 or 6

ICAO Level 4 is the minimum operational level for aviation English. For many pilots, reaching Level 4 is enough to meet the basic regulatory requirement.

But for others, Level 4 can feel frustrating.

You may be able to communicate in English. You may fly regularly, understand ATC, and use standard phraseology correctly. However, when it comes to the ICAO English test, you may still struggle to reach Level 5 or Level 6.

This usually happens because ICAO language proficiency is not only about knowing aviation words. It is about speaking clearly, naturally, and effectively in both routine and non-routine situations.

In this article, we look at why many pilots remain stuck at ICAO Level 4 and how targeted Aviation English training can help you improve.

Level 4 Is Operational, But It May Not Be Your Final Goal

ICAO Level 4 means that your English is considered operational. In simple terms, you can communicate safely enough for aviation radiotelephony.

However, Level 4 normally requires more frequent renewal than higher levels. Many pilots want to improve toward Level 5 or Level 6 because they want:

• stronger confidence in international operations;

• better performance in airline or job interviews;

• fewer problems during licence renewal;

• better communication in abnormal or emergency situations;

• a more professional level of spoken English.

Level 4 is not a failure. It is a valid operational level.

But if your goal is to improve, you need to understand what is holding you back.

Problem 1: You Speak English, But Not Fluently Enough

Many pilots have enough vocabulary to communicate, but they speak with too many pauses, hesitations or restarts.

For example, a candidate may say:

“I think… ehm… in this situation… the pilot should… maybe… contact ATC… and explain… the problem.”

The meaning is understandable, but the delivery may sound slow or uncertain.

Fluency does not mean speaking fast. It means speaking smoothly enough for the listener to follow your message without too much effort.

To improve fluency, you need regular speaking practice, not only grammar exercises or vocabulary lists.

A good Aviation English course should help you practise answering questions naturally, developing ideas, and continuing to speak even when you are unsure of a word.

Problem 2: Your Answers Are Too Short

Another common problem is giving answers that are technically correct but too short.

For example, if the examiner asks:

“What should a pilot do in case of radio failure?”

A weak answer might be:

“He should follow the procedure and land.”

This answer is not completely wrong, but it does not show enough language ability.

A stronger answer would be:

“In case of radio failure, the pilot should first try to re-establish communication, check the frequency, volume and headset, and follow the published radio failure procedure. If the aircraft is in controlled airspace, the pilot should also follow the expected route and altitude, squawk the appropriate code if required, and continue according to the clearance or national procedure.”

This answer gives the examiner much more evidence of vocabulary, structure, fluency and interaction.

In the ICAO English test, short answers can limit your score because the examiner cannot assess what you do not show.

Problem 3: Too Much Phraseology, Not Enough Plain English

Standard phraseology is essential in aviation. Pilots must know how to use clear and standard radiotelephony communication.

But ICAO English is not only phraseology.

In real aviation, not every situation is standard. Pilots may need to explain:

• a technical problem;

• a passenger issue;

• a medical emergency;

• a weather deviation;

• a fuel concern;

• a misunderstanding with ATC;

• an unexpected operational problem.

These situations often require plain English.

For example, saying:

“Mayday, mayday, mayday”

is phraseology.

But explaining:

“We have a passenger on board who is unconscious and needs urgent medical assistance after landing”

requires plain English.

Pilots who rely only on memorised phraseology often struggle when they need to describe, explain, justify or interact.

To move toward Level 5 or Level 6, you need to practise both aviation phraseology and natural plain English.

Problem 4: You Know the Answer, But You Cannot Organise It Clearly

Some pilots understand the situation but do not structure their answer well.

They jump from one idea to another, repeat themselves, or stop before fully explaining their point.

A useful structure is:

1. Describe the situation.

2. Explain the risk or problem.

3. Say what the pilot should do.

4. Explain the expected result.

For example:

“The situation appears to involve a possible bird strike shortly after take-off. The main risk is engine damage, so the crew should monitor the engine instruments, inform ATC, and decide whether to continue or return to the airport. If there is vibration, loss of power or any abnormal indication, returning for a precautionary landing would probably be the safest option.”

This type of answer is clear, logical and easy to follow.

The examiner is not only listening for vocabulary. The examiner is also checking whether you can communicate your ideas effectively.

Problem 5: You Do Not Have Enough Vocabulary for Abnormal Situations

Many pilots can speak comfortably about normal operations, but they struggle when the topic becomes more complex.

For example, they may not have enough vocabulary to discuss:

• engine malfunction;

• hydraulic problems;

• smoke in the cockpit;

• pressurisation issues;

• passenger behaviour;

• medical emergencies;

• runway incursions;

• diversions;

• thunderstorms;

• fuel management;

• communication failure.

This does not mean you need to sound like an aircraft engineer.

The ICAO English test is a language test, not a technical systems exam.

However, you need enough vocabulary to describe the problem clearly and explain what action should be taken.

Targeted Aviation English training can help you build the vocabulary you actually need for aviation scenarios, instead of learning random general English words that may not help you in the test.

Problem 6: You Translate From Your Native Language

Many candidates think in their native language first and then translate into English while speaking.

This often creates unnatural sentences, slow delivery and grammar mistakes.

For example, the candidate may know exactly what they want to say, but the sentence structure becomes too complicated because they are translating word by word.

The solution is not to memorise perfect answers.

The solution is to practise aviation topics directly in English until the most common structures become automatic.

For example:

• “The main risk is…”

• “The pilot should inform ATC because…”

• “In my opinion, the safest option would be…”

• “This could lead to…”

• “The crew would need to…”

These simple structures help you speak more clearly and reduce translation time.

Problem 7: You Do Not Get Corrective Feedback

Self-study can help, but it has one major limitation: you may not notice your own mistakes.

You may repeat the same grammar, pronunciation or fluency problems for months without realising it.

This is where 1-to-1 Aviation English training can be very useful.

A good instructor can identify:

• pronunciation problems;

• weak grammar patterns;

• limited vocabulary;

• unnatural sentence structure;

• hesitation and fluency issues;

• short or incomplete answers;

• problems with interaction;

• overuse of memorised phrases.

This feedback helps you improve faster because you are not guessing what went wrong.

You know exactly what to work on.

How Aviation English Training Helps You Improve

A structured Aviation English course helps you practise the skills that are actually assessed during the ICAO English test.

This may include:

• speaking fluently about aviation topics;

• describing pictures and operational situations;

• discussing abnormal and emergency scenarios;

• improving pronunciation and clarity;

• expanding aviation vocabulary;

• using plain English effectively;

• answering questions in a structured way;

• receiving correction and feedback from an instructor.

The goal is not to memorise answers.

The goal is to become a clearer, more confident and more effective communicator in aviation English.

If you want personalised support, you can join our 1-to-1 ICAO Aviation English Course for Pilots, where lessons are adapted to your level, your weaknesses and your target result.

How Many Lessons Do You Need?

The number of lessons depends on your current level and your target.

Some pilots only need a short session to identify weaknesses and practise exam-style questions.

Others need more structured work to improve fluency, vocabulary and confidence.

As a general guide:

A short 2-hour option can help you understand your current level and main weak points.

A 4-hour package can help you practise the most important test areas and correct common mistakes.

A 10-hour package is better if you need deeper improvement, especially if your goal is to move from Level 4 toward Level 5 or Level 6.

The right choice depends on how much time you have, how confident you feel, and how much improvement you need before the test.

Final Advice: Do Not Memorise, Train Communication

Many pilots prepare for the ICAO English test in the wrong way.

They memorise answers, learn long lists of aviation words, or focus only on standard phraseology.

This can help a little, but it is not enough.

To improve your ICAO level, you need to practise real communication.

You need to explain situations, give opinions, describe problems, interact with the examiner

and speak clearly under pressure.

That is why targeted Aviation English training is so valuable.

It helps you move from “I understand English” to “I can communicate clearly and confidently in aviation situations.”

Need Help Improving Your ICAO English?

If you are stuck at ICAO Level 4, preparing for your first ICAO English test, or aiming for Level 5 or Level 6, English4Aviation can help you train in a focused and practical way.

Our ICAO Aviation English Course for Pilots includes personalised 1-to-1 lessons, aviation-focused speaking practice, exam-style questions and feedback from experienced instructors.

You can choose the amount of training that fits your needs and prepare with a clear plan instead of guessing what to study.

Start your ICAO Aviation English training today and improve your confidence before the test.