Cessna 188 Series Service Manual page 72

MODEL 188 & T188 SERIES SERVICE MANUAL
Counts as one crack. Usable if
not closer than one-inch to a
similar crack.
REPLACE SEAT RAIL WHEN:
a. Anyportion of web or lower flange is cracked, (index 2).
b. Any crack in crown of rail is in any direction other than
right angle to length of rail.
c. Number of cracks on any one rail exceeds four, or any
two cracks index 1) are closer than one-inch.
NOTE
Use of seat rail cargo te-downs
is not permissible on seat rails
with cracks.
Figure 3-9. Seat Rail Inspection
3-18