6-11 FUEL LINES AND FITTINGS (Continued)
Inspect tube assemblies for cleanliness. If
necessary, clean (Task 6-11-2).
Inspect for scratches. Minor scratches to a depth of
0.003 inch are acceptable.
Inspect for nicks and chafing. Minor nicks and
Inspect for dents. Round bottom dents are
permissible, provided the depth is not greater than 10%
of the normal outside diameter of the tube. No more
than three dents to the maximum depth, are permitted
for every 12 inch length of tube and such dents shall be
separated by at least 0.250 inch. No dents are
permitted within 0.250 inch of
ferrules or fittings.
Inspect for pitting. Minor isolated pitting is
permitted, provided that it is not deeper than 0.003 inch.
Inspect for corrosion. Rust and stains are
acceptable, if removed by light polishing with Crocus
Inspect end fittings for condition of threads.
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