[QUOTE=TonyC]
By the way, I couldn't find "15%" in either paragraph you cited.[QUOTE]
I guess that the terminology "15% ride" is more of an airline industry thing... odds are if you never worked for a regional or a part 142 training center, you probably never heard it. It is slang for the required in aircraft portion of a checkride if you either don't meet the required simulator certifications (IE not a level C/D sim), or the requirements of 61.63 or 61.157.
A "15% ride" consists of the following items (the name is derived because it's roughly 15% of a normal checkride). They are completed in the actual aircraft:
(A) Preflight inspection;
(B) Normal takeoff;
(C) Normal ILS approach;
(D) Missed approach; and
(E) Normal landing.