I can't link you an independent source just my word as an aircraft mechanic.
I have never seen a 100% serviceable aircraft, as far as I'm concerned a aircraft where everything works to spec and the spec works to needs is a myth that we strive for but can never achieve.
I have never seen a 100% serviceable aircraft, as far as I'm concerned a aircraft where everything works to spec and the spec works to needs is a myth that we strive for but can never achieve.