3. Explanation of Columns in Section III.
a. Reference Code. This column consists of two letters separated
by a dash, both of which are references to Section II.
The first
letter references column 5 and the second letter references a mainte-
nance function,
column 3, A through K.
b.
Remarks. This column lists information pertinent to the mainte-
nance function being performed, as indicated on the MAC Section II.
21
3 0 7 - 9 6 7
O - 6 8 -4
