There is the number of uncountable words in English which are NEVER USED IN PLURAL FORM.
The most common ones which can be encountered in aviation context are
equipment
damage
information
advice
knowledge
education
fuel
ice
luggage
smoke
news
travel
understanding
Some examples:
There IS a lot of emergency EQUIPMENT on board of a plane.
The aircraft sustained a lot of structural DAMAGE.
We enhance our KNOWLEDGE and improve our skills on simulator.
This NEWS IS not correct.
