Toxic Gas Scandal on US Passenger Planes: Passengers and Crew Face Health Threat

In the United States, it has emerged that toxic gas and smoke leaks on some passenger aircraft have caused passengers and cabin crew to suffer serious health problems. Experts warn that the issue could lead to permanent brain damage.

According to an in-depth investigation by The Wall Street Journal (WSJ), the growing number of toxic gas and smoke incidents in recent years has forced some flights to make emergency landings. Passengers and crew members have been hospitalised, while some pilots reportedly experienced vision loss and impaired reaction times.

Engine Oil Vapour Leaking into the Cabin

In one incident in February, smoke filled the cabin mid-flight, prompting crew members to advise passengers to breathe through their clothes, and the plane had to make an emergency return. Investigations revealed that evaporated engine oil had leaked into the cabin.

Experts point to the “bleed air” system used in aircraft as the source of the problem. When high-pressure air taken from the jet engine’s compressor section mixes with engine oil and hydraulic fluids, neurotoxins, carbon monoxide and harmful chemicals can seep into the cabin.

Are Manufacturers Ignoring Warnings?

It is alleged that aerospace giants Airbus and Boeing have long been aware of these risks but have failed to take necessary precautions due to high costs. Internal company correspondence revealed concerns within Boeing about drawing attention to air quality issues in older models while promoting the new air system of the 787 Dreamliner.

The Federal Aviation Administration (FAA) argues that such incidents are “rare,” but WSJ reported 330 gas leak cases last year alone, suggesting the actual figure may be double. The Airbus A320 family was cited as the aircraft most affected.

Permanent Health Effects

Some cabin crew exposed to gas leaks have developed lasting health issues such as migraines, cardiac arrhythmia, light sensitivity and central nervous system damage. Experts emphasise that long-term exposure could result in traumatic brain injury.

Bill Proposed as a Solution

Despite the United Nations recognising these risks for a decade, no substantial action has been taken. A recently introduced bill in the US Congress proposes fitting planes with special filters and phasing out the “bleed air” system. However, a similar initiative was blocked last year under pressure from the aviation lobby.