Section 10 – Waterproofness:

  • Condensing Water Drip Proof Test
  • Drip Proof Test
  • Spray Proof Test
  • Continuous Stream Proof Test

Equipment Categories

Category Y

Equipment that is installed in locations where it is subjected to condensing water in the course of normal aircraft operations.

Category W

Equipment that is installed in locations where it is subjected to falling water (generally the result of condensation) in the course of normal aircraft operations.

Category R

Equipment installed in locations where it may be subjected to a driving rain or where water may be sprayed on it from any angle.

Category S

Equipment installed in locations where it may be subjected to the forces of a heavy stream of fluid such as would be encountered in aircraft de-icing, washing or cleaning operations.