(1) Apply pressure to Coupling Halves (as if to push them together). Measure and record the
break-away joint gap at each pin position with the couplings fully compressed.
(2) Apply opposite pressure to the coupling halves (as if to pull them apart). Again measure and
record the break-away joint gap at each pin position with the coupling fully extended.
(3) Calculate the difference in these measurements at each pin position.
d. If the difference is 0.085 inches or less, at all locations, the coupling is serviceable. Reinstall the Oil
Line. Pay close attention to alignment of the 90-Degree Coupling Half. If necessary, loosen the 90-Degree
Coupling Half from the Lubriclone Filter and reposition it so that the least amount of side loading is placed
on the Break-Away Coupling. Ensure that the clamp used to secure the Oil Line to the Lower Fuel Filter
Line is positioned as close to the Break-Away Coupling-end of the Oil Line as practical to reduce vibration.
e. If the difference is greater than 0.085 inches at any of the three locations, proceed with the correction
9. Correction Procedures.
a. Replace the 90-Degree Coupling Half with a serviceable coupling if the difference calculated in
b. Reinstall the Oil Line. Pay close attention to the alignment of the 90-Degree Coupling Half. Position
the 90-Degree Coupling Half so that the least amount of side loading is placed on the Break-Away
Coupling. Ensure that the clamp used to secure the Oil Line to the Lower Fuel Filter line is positioned as
close to the Break-Away Coupling-end of the oil line as practical to reduce vibration.
c. Repeat this inspection at each phase inspection. The inspection procedure will be added to
reference 13.a. Reference 13.b. will be changed to reflect this new requirement.
d. If a replacement 90-Degree Coupling Half is not available and cannot be obtained in a timely manner
through the supply system, a solid fitting may be used temporarily until a replacement is received. The
status symbol of the affected aircraft shall be a horizontal red dash until the solid fitting is removed and a
replacement 90-Degree Coupling Half is installed. Install a solid fitting as follows:
(1) The following parts are required:
AN833-12D OR MS24394D12
(2) Disconnect the hose from the Straight Coupling Half, and retain the coupling half for later
(3) Install Tube Elbow into Lubriclone Assembly using Preformed Packing and Nut. Do not tighten
The Tube Elbow is shorter than the Break-Away Fittings, therefore, it may
be necessary to reposition the Oil Line by loosening and relocating the
stand-off clamps between the Oil Line and the Lower Fuel Filter Hose.