The D check requires the skills of engineers, technical writers, quality control inspectors, avionics technicians, * sheet - metal workers, and airframe and power - plant mechanics, * most of whom are government licensed.
दूसरे कई लोग ज़रूरी उपकरण, सामान और इस काम में एक - एक हिदायत देने में सहायता करते हैं ।