Aviation: Fume Events

Countess of Mar Excerpts

Tuesday 18th March 2014 Lords Chamber

Asked by

[The Countess of Mar]

To ask Her Majesty’s Government how air crew and passengers in commercial airlines without filtration or detection systems are warned, protected and informed in the event of a fume incident from contaminated bleed air.

[The Countess of Mar (CB)]

My Lords, I beg leave to ask the Question standing in my name on the Order Paper. In doing so, I declare my interest as patron of the GCAQE.

[The Minister of State, Department for Transport (Baroness Kramer) (LD)]

My Lords, operators are required to include detailed instructions to crew on procedures to be followed when contamination of cabin air is present or suspected. Any passenger who became unwell would be given first aid by the crew and, if necessary, referred for further medical assessment and care after landing. There is no national or international legislation requiring air crew or passengers to be informed of fume events.

[The Countess of Mar]

My Lords, it is almost 60 years since the danger of fumes seeping into cabin air was first reported. With the notable exception of the Boeing 787, virtually all passenger jets still have flawed and potentially dangerous bleed air systems, a design that leaks pyrolised oil into the air supply. Does the Minister agree that most shocking of all is the fact that airlines fail to inform passengers that they have been exposed, which—and I have chosen my words very carefully—must be a breach of passengers’ rights and casts a dark reflection on the aviation industry? What solutions does the Minister have?

[Baroness Kramer]

My Lords, on most commercial aircraft the cabin air supply is provided by engine bleed air, which is drawn from the compressor stage of the engine. Contamination, known as a fume event, may occur when oil or hydraulic fluid is released into the bleed air—for example, as a result of an oil seal failure—resulting in the formation of a fleeting odour or mist in the aircraft cabin. Most fume events last less than a minute or two.

Many investigations have been carried out by the department, of which the noble Countess will be well aware. The committee on toxicity concluded that there was no evidence for pollutants occurring in cabin at levels exceeding available health and safety standards and guidelines and, as most levels observed were comparable to those typically experienced in domestic settings, there is appropriately no requirement for passengers to be informed. There are many steps to be taken if there is an assessment that there is any endangerment to any passengers or to the flight.