asked the Secretary of State for Air whether it is the practice in the Air Ministry, in the event of a complaint being made by members of the staff which necessitates an inquiry being held, to appoint an official involved in the complaint to hold the inquiry and to report thereon?

The answer is in the negative. An official involved in a complaint made by persons serving under him would certainly be asked to make a report on the matter, but obviously he could not conduct a, disciplinary inquiry into his own actions.