(b)require the aircraft or an aircraft component or an item of equipment of that aircraft to undergo such modification, repair, replacement, overhaul, inspection including flight tests and examination under the supervision of an approved person as the Director-General may specify, as a condition of the [certificate of airworthiness or special certificate of airworthiness] [Substituted by Notification No. G.S.R. 721(E), dated 23.6.2017 (w.e.f. 23.3.1937).] remaining in force.