The physical and chemical environment in cabins of long-distance aircraft.
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Biomedical subjects
Publications and source records attributed to P Fourn.
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In the long run, the fatigue in aircrews performing frequent, long-range flights is linked to factors connected to the aircraft, such as noise, temperature, cabin pressure, atmosphere quality, and flight characteristics. These are the factors inherent to the aircraft which we have investigated during six long-range flights without time zone changes in DC-8 and DC-10 aircraft of the U.T.A. Cie. The results show that none of the pollutants researched reach doses considered hazardous by FAR 25 or by French legislation. This fact is due to the effective ventilation in the cabins. In flight, thermal comfort is limited by a too-low hygrometry RH = 12%. Even in a modern aircraft, the noise level remains high, but acoustical energy is spread over the less detrimental frequencies.
In West and Central Africa one adult in 4 or 5 carries AS trait. This haemoglobin abnormality therefore underlines the question of aptitude of navigation personnel in national or international air-lines. Among these personnel one should separate commercial navigation personnel (CNP) and technical navigation personnel (TNP), if the aptitude in flight of CNP may perhaps be acquired without systematic previous submission to files of Civil Aeronautics Medical Advice, on the other hand a definite and irrefutable decision on the aptitude of TNP can only be envisaged after proving tests for placing the personnel carrying sickle cell trait in the context of airling work.