m e t h o d of detection, look through the
s u s p e c t e d area at some distant object.
T h e object should appear undistorted.
Excellent lighting is imperative.
B r i g h t sunlight may be used if
This object should be at a
t a n c e of approximately 30
( a ) If the suspected area has been
and illuminated from behind.
removed from the aircraft, hold
crossed bars of a window
it at arms length and look
i d e a l , however a pole or a
Move it slowly
b. Minor scratches can be readily detected with
The object should retain its
t h e fingernail.
s h a p e and
throughout all movements.
c. Deep scratches can be readily detected with
(b) lf movement of the object is
d. Fractures which include chipping, very deep
impractical, then a slow move-
a b r a s i o n s , or crazing are readily detected visually or
ment of the head will suffice.
with the fingertip.
(2) When using t h e n a k e d e y e d i s t a n t