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A network of doctors was made accessible for timely medical assessment of any crew member suspected of being affected by odour exposure. Practitioners were given a brief on the issue but were not constrained in any way by Ansett in the performance of their duties. A cabin air sampling program was also undertaken …
We also sought to involve external expertise. This included Professor Vlad Vasak, an aviation occupational hygienist, and the New South Wales WorkCover laboratories that conducted air and ventilation duct sampling on the aircraft; Richard Fox of AlliedSignal - the manufacturer of the engine and the auxiliary power unit, APU conducted comprehensive air quality testing in-flight and on the ground; George Lee of the Queensland Health Scientific Services conducted ground and in-flight air sampling using a real-
43 BASI Occurrence Brief 199702276 (on Internet site) incident involving Captain Kolver on 10 July 1997, p 3.
time gas chromatograph and a novel liquid nitrogen device; Dr Rob Liddell, the former medical director of the Aviation Safety Authority, flew with and interviewed over 80 flight attendants and pilots; an independent panel of experts with toxicological, immunological and occupational medicine expertise was convened to review all of the extensive data available; and Professor Westerman of Monash University carried out a study of the effects of low level carbon monoxide on pregnancy.44
4.46 Captain Jensen told the inquiry on 1 May 2000 that, “… Ansett has not only improved cabin air quality on aircraft but has also collated arguably the most detailed set of data on BAe 146 air quality anywhere in the world.”45
4.47 Ansett claims that it has pioneered the development of engineering modifications and procedures to address cabin air quality in the BAe 146 aircraft. Engineering enhancements include:
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engine and auxiliary power unit modifications to prevent oil and/or APU exhaust leaking into the air conditioning system, and
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modifications to the air conditioning system to improve airflow in the cabin.46
4.48 According to Ansett; “These modifications have resulted in a significant reduction in the number of reported odour occurrences.” 47
4.49 On 1 May 2000 Captain Jensen advised the inquiry that Ansett estimated the cost of the modifications it had made to its BAe 146 aircraft and other in house activities and initiatives related to dealing with air quality on these aircraft to be in the “vicinity of $7 million”.48
4.50 On 13 March 2000 Mr Mick Toller, the Director of Aviation Safety with the Civil Aviation Safety Authority, brought the inquiry up to date concerning progress on modifications being made to engines on Ansett’s BAe 146 aircraft when he stated:
Ansett now have 12 aircraft in their fleet. I think they had 13 probably when they appeared before you, but they are now down to 12. All of those aircraft have had their APUs modified. I understand that, of the 60 engines that they have, one engine still has all the modifications outstanding so there has not been anything done to it. One has two of the modifications outstanding; four just have one outstanding. So of the 60 engines, 53 have been fully modified and, of the aircraft modifications, eight have been completed or, for various reasons, do not require modification because they were built later. The remaining four are due to be modified by the end of October 2000.49
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