Cabin Air Safety/Aerotoxic Syndrome

Debate between Grahame Morris and Robert Goodwill

Thursday 17th March 2016 Westminster Hall

[Grahame M. Morris]

The Minister is making a good point. In fact, the issue was raised by my hon. Friend the Member for Newport East (Jessica Morden). Does he accept that the problem is the regular, continuous exposure to various levels, whereas sheep dipping, even though it was done without proper protection initially—he can correct me if I am wrong—would presumably be for a limited period? It would not be every day in someone’s working life on the farm.

[Mr Goodwill]

I will go on to describe the levels that those in aircraft cabins are likely to be exposed to under normal operations when a fume event has not taken place. However, as I was saying, neither of my two friends who are suffering from career-finishing symptoms—they are not able to work—had been involved in either the aviation industry or in agriculture. I suspect that if they had been involved in agriculture, I would have been asking questions about whether their exposure to sheep dip or to other agrochemicals may have been to blame. Similarly, if they had been in the aviation industry, I would perhaps be asking the same questions.

The Government take the health and air safety of passengers and crew extremely seriously. The United Kingdom is recognised throughout the global aviation community for its high standard and excellent record of safety in commercial aviation. I must make it clear that the Government must always act on evidence and we have over the years worked hard to collect evidence, as did the previous Government when the problem first came to public awareness. There has been much public debate about the issue as so many people are aware of the problem.

There are currently two inquests into deaths where the relatives of the deceased are trying to establish whether contamination by cabin air could have been the cause of death. Both inquests are still open, and in both cases the CAA rather than my Department has been named as an interested party. Both of the deceased were employed by the same airline, and so far the evidence that has been gathered does not support the view that the deaths were connected to contamination of cabin air.

In the case of Richard Westgate, the Dorset coroner’s January pre-inquest review has been adjourned to 30 March 2016 to allow time for medical experts’ reports to be submitted, but he did release a prevention of future deaths report in 2014, which some have taken as a signal that the death might be attributed to contamination of cabin air. However, there was no evidence to suggest that this was the case, and we await the full inquest verdict with a great deal of interest.

In the case of Matt Bass, who has been mentioned during this debate and whose case is before the Berkshire coroner, the January pre-inquest review has been adjourned until 15 June 2016 to allow time to locate medical samples and to instruct the experts. I offer my deepest sympathies to the families and friends of the deceased, but, as the two inquests have not been concluded, it would not be appropriate for the Government to comment in further detail.

--- Later in debate ---

[Mr Goodwill]

Certainly the CAA is involved in this. I meet regularly with the unions involved, particularly BALPA, so it is not something that we are trying to shuffle away, but we need to wait for the result of the inquest before we report on these particular cases. I will go on to present various pieces of evidence and show where we are on this important matter. I will talk about what work has already been done and what work we believe needs to be done.

The safety of cabin air is an issue that has been a matter of public debate over several years—in fact, over a decade now. This continues to be the case, and I, together with my noble Friend Lord Ahmad of Wimbledon, have received a considerable amount of correspondence and responded to several parliamentary questions on cabin air quality. As background, some crew and passengers have expressed concerns that they have suffered long-term health impairment, which they contend is due to exposure to organophosphates present in small amounts as additives in aviation engine oils and hydraulic fluids.

As ever, we have to be careful to have regard to whether there is evidence to support the link between the illnesses and cabin air. That is why the concerns have been investigated at length over a number of years. In 2006 the previous Government arranged for the Committee on Toxicity of Chemicals in Food, Consumer Products and the Environment—an independent advisory committee of toxicology experts—to review evidence from the British Airline Pilots Association. At the time, the Committee on Toxicity considered that it was not possible to conclude whether cabin air exposures in general, or following incidents such as fume events, cause ill health in commercial aircraft crews. It recommended further work to ascertain whether substances in the cabin environment could potentially be harmful to health.

A second inquiry was held by the House of Lords Science and Technology Committee, which looked into this issue as part of a wider inquiry in 2007, and published its findings in a report called “Air Travel and Health”. In that report, the findings of the Committee on Toxicity were supported. Following the recommendation in 2007 by the Committee on Toxicity, the Government commissioned a series of scientific studies as part of a research programme on cabin air. The principal research study, which was carried out by Cranfield University, was published in 2011. It found that, with respect to the conditions of flight experienced during the cabin air sampling, there was no evidence of pollutants occurring at levels exceeding health and safety standards and guidelines. Levels observed in the flights that formed part of the study—I stress that they did not include an instance of an oil seal failing—were comparable to those typically experienced in domestic settings. No higher levels of exposure were found than, for example, we would experience in this Chamber.

In addition to the principal study, three further research studies were commissioned and published by the Government. Those four published studies were formally submitted to the Committee on Toxicity for consideration in 2012. The Committee considered the research reports, as well as other research published in the scientific literature since 2007, and subsequently published a position paper on cabin air in December 2013.

I have recently written to several Members of Parliament regarding the findings of the Committee’s position paper. In that letter, which was also placed in the Libraries of both Houses, I summarised the advice the Committee gave and its conclusions. In short, the paper recognises that contamination of cabin air by components or combustion products of engine oils does occur, and that episodes of acute illness have occurred shortly after such episodes. However, it found that levels of chemicals in bleed air would need to occur in far higher concentrations than those found during the studies to cause serious toxicity, and that the symptoms that have been reported following fume events have been wide-ranging, and less specific than those that typically occur from chemical toxicity.

[Grahame M. Morris]

I am grateful to the Minister, who is being characteristically generous in giving way. Is there not a basic flaw in that suggestion, if we do not count incidents? Could it be that in some older aircraft that may not be maintained to such a rigorous standard, air fume events are more frequent? Is that not a possibility, if we do not do a proper investigation, in situ, in real time?

[Mr Goodwill]

That is a very reasonable point to make. The findings have been made by professional toxicologists, whose job it is to analyse the effects of toxic compounds in a variety of locations, including the workplace. I shall come on to talk about the number of so-called fume events, and I have some evidence from the CAA to put it in context.