HC Deb 06 December 1971 vol 827 c218W
Mr. Wilkinson

asked the Secretary of State for Trade and Industry whether he is satisfied that the stand-by blind flying instrumentation of Viscount aircraft currently in British airline service is adequate for satisfactory let-down procedures in Instrument Meteorological Conditions following total electric failure in the aircraft; and if he will make a statement.

Mr. Noble

Total failure of all electrical services in Viscounts, as in many other aircraft, would leave insufficient instrumentation for a let-down in Instrument Meteorological Conditions but I am assured by the Air Registration Board that adequate emergency power supplies are provided to allow such a let-down should the aircraft's generated power be lost.