Why a Clip of Tejas Dripping Water Went Viral
India’s LCA Tejas is drawing global attention at the Dubai Airshow 2025, but a short viral clip on social media briefly stole the spotlight for the wrong reasons. The video showed water dripping from the belly of the aircraft—quickly triggering speculation about an “oil leak,” a “serious defect,” and even claims that the fighter was “failing on the tarmac.”
Comments flooded in: “Is Tejas faulty?” “Why is it leaking?”
Here’s the truth: The aircraft is not leaking. It’s not malfunctioning. And it’s definitely not losing oil. What the world saw was normal drainage of condensed water—a routine and healthy sign that the jet’s cooling and pressurization systems are doing exactly what they’re designed to do.
What People Saw Was Not a Leak—It Was the ECS Working Normally
Every modern aircraft, military or commercial, occasionally releases water during and after flight. This includes everything from the F-16 and Rafale to an Airbus A320 or Boeing 787.
This moisture discharge comes from the aircraft’s Environmental Control System (ECS), which regulates temperature, airflow, and pressure inside the cockpit.
If you’ve ever seen your home air conditioner dripping water, you already understand the concept.
Why does this happen?
- Pilots breathe → adds humidity
- Electronics generate heat → increases temperature
- Warm air inside the cockpit → contains moisture
When the ECS cools this warm, humid air, water droplets form—just like condensation in an AC unit. The aircraft then drains this water outside through small outlets under the fuselage.
What appeared in the viral Tejas video is exactly that.
Breaking Down the Science: How the ECS Works
Most jet aircraft, including Tejas, rely on bleed air—hot, high-pressure air tapped from the engine compressor—to run the ECS.
Here’s what happens next:
1. Bleed air exits the engine extremely hot
Temperatures can exceed 200°C (392°F). This air cannot be used directly.
2. The ECS reduces pressure
This makes the air usable and safe for cooling and pressurization.
3. Heat exchangers cool the air
Special units rapidly lower the temperature.
4. Moisture condenses into water droplets
Basic physics: warm air + cooling = water.
5. The aircraft drains that water outside
Through small outlets beneath the fuselage.
This is the “leak” seen online.
In fact, not seeing this water discharge in certain conditions can be a sign of a malfunction.
No, Tejas Isn’t Faulty: The Internet Simply Misread the Science
The water dripping from Tejas is:
- Normal
- Expected
- Evidence that the cooling, pressurization, and humidity-control systems are functioning properly.
Aviation engineers, pilots, and defense experts all confirmed the same thing: This is routine. Every aircraft does it.
The claims circulating online were a mix of misunderstanding and misinformation—amplified by people unfamiliar with aviation systems.
The Bigger Issue: Quick Panic, Slow Facts
The Tejas clip became a textbook example of how fast misinformation spreads online.
A harmless water discharge turned into a mini controversy within hours—overshadowing the jet’s actual achievements at the airshow.
India’s LCA Tejas remains:
- A highly capable modern fighter
- Successfully showcased in multiple international events
- A product of advanced Indian aeronautical engineering
At the Dubai Airshow, Tejas has been earning praise for its agility, reliability, and performance. The aircraft is doing its job flawlessly.
And yes, the dripping water is part of that flawless performance.