Some minor surface damages to tubing are
AN815 unions. Position the AN818 nuts and AN819
acceptable, as described in inspection of tubing
sleeves on the new section. A new section is not
damage. A nick that is not deeper than 15 percent of the
required when the length of the union is longer than the
wall thickness of aluminum, aluminum alloy, or
damaged section. Install the new section of tubing and
corrosion-resistant steel is acceptable after being
tighten the AN818 nuts. Permanent repairs include
reworked by burnishing with hand tools. Minor damage
removal of minor damage on tubing and fittings and the
to fittings is defined as damage not to exceed repairable
replacement of line sections or fittings by Permaswage
limits, as shown in figure 10-48.
or Dynatube swaging equipment, or by induction
brazing.
Fittings that exceed repairable limits should be
replaced. To repair damaged fittings, proceed as
NOTE: Induction brazing is limited to depot-level
follows: To repair damaged orifices, remove any
repair. Tube assemblies used for engine-related
restriction in the orifice and handstone it to blend rough
hydraulic, fuel, oil, vent or drain lines usually have
edges or burrs, as shown in view A of figure 10-48.
brazed or welded end fittings. These engine-related
To repair damaged or ridged seats, resurface
tube assemblies are normally fabricated from
circumferential ridges with annular tool, as shown in
corrosion-resistant steel.
Figure 10-48.--Reworking damaged fittings.
10-44
