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ICAO English Licensing Tests
Understand your language proficiency level with reference to the ICAO Language Proficiency Requirements and various types of test.

"Air density is perhaps the single most important factor affecting airplane performance. Do you agree with this statement? Why or why not?"

This is a great ICAO test question as it allows a candidate to talk about principles of aerodynamics in their own words.  


We are not going to give you a model answer, but we will help you construct a good answer.

375px-Density_Altitude How does air density affect performance?

When planning your answer consider these factors:

  • lift generated by the wings
  • efficiency of the propeller
  • power output of the engine
  • dry air
  • friction

Also consider the effects of density altitude:

  • acceleration
  • attain the same lift
  • avoid stalling
  • reduced power production
  • lower service ceiling

Essential Aviation English vocabulary

lift, airfoil, propeller, humid, reduced, decreased, true, obstacles, altitude
A candidate will also be able to use different forms of a word, eg efficient, efficiency, efficiently so make sure you know your parts of speech.

For more tips on answering ICAO test questions visit 
To enrol on a course with Aviation English Asia Ltd call us on +852 81799295 to arrange a consultation or email This email address is being protected from spambots. You need JavaScript enabled to view it..

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Are there any online classes available?

During the pandemic learners who are not able to attend a classroom-based class can choose to attend an online tutorial instead.

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Hong Kong

Aviation English Asia has been offering part time and full time courses in Hong Kong since 2009.

All courses are available in Hong Kong. Check the schedule above for details.


Aviation English Asia has been offering part time courses in Vietnam since 2014.

All courses are available in Vietnam - typically every 8 weeks, or by special arrangement.


ICAO Aviation English, English for Aircraft Maintenance Engineers, Technicians and Mechanics, and English for Flight Attendants are available in Taipei, Tainan and Kaosiung.


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