57. Mr. PALMERasked the Under-Secretary of State for Air if he can state the average flying lifetime of an aeroplane; and what are the methods employed by his Department to ensure that no aeroplanes are retained in commission to the prejudice of safe flying?
§ Mr. MONTAGUEIt is not possible to give a definite answer to the first part of the question. The flying lifetime of an aeroplane depends upon the type of machine, the country in which it is used, and the manner of its use and other variable factors. As regards the second part, elaborate instructions in regard to the maintenance, inspection and testing of service aeroplanes are laid down in the King's Regulations and Air Council Instructions. They provide for a daily inspection of all machines in use, for further periodical inspections after a given number of hours' flying, and for complete overhaul or reconditioning after other stated periods. The system in force should make it impossible for any machine to be retained in commission if it has become unsafe for flying.
Captain BALFOURIs the hon. Gentleman making every possible effort to ensure that aircraft 12 years old in design will not be used—war-time aircraft?
§ Mr. MONTAGUEI must have notice of that question.