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MAINTENANCE MANUAL
SAVANNAH S
Doc. No.:
MM-SVNH-EN
Revision:
07
Rev. Date:
07/11/2022
Proj. Ref.:
SVNH S
A/C:
Savannah S
Applies to Generic Serial Number:
yy-mm-54-xxxx
Page:
22/132
DOC
FMM00
Figure 3: Threaded fasteners
1.14.4. Bolt-Nut cross-check mark
Green marks are usually sign of manufacturer production verification and should not be used as a
rotation visual cross-check marks.
Cross-check red torque seal (glue) can be used in engine parts or important threaded fastening to
monitor visually the unscrewing. The cross-check must be marked parallel to the screw axis and
perpendicular to the touching faces of the fastening parts and eventually the structure. When the
cross-check mark is consumed, damaged or cracked, replace the nut (and eventually the bolt) with
a new one and close at proper torque.
1.14.5. Pop riveting
Assemble the most part of structure by means of Cleco (spring loaded clamp), installed respectively
in the proper holes diameter (usually 2.5, 3.2 and 4 [mm]). Remove a Cleco and add the rivet, chosen
correspondent with the hole diameter, and with a proper length exceeding the sheet of almost 1.5
times the rivet diameter, excluding the ones described differently in the
Construction Manual
. Pull
the rivet properly and repeat the operation. Always control the result of the special riveting process:
check the head of rivet is pressing entirely and parallel to the skin, not damaged, check the bulb of
the rivet (behind), it must be strongly pressing the sheets and the bulb dimensions must be minimum:
height 0.75 times the diameter, width 1.3 times the diameter.
1.14.6. Solid riveting
Assemble the most part of structure by means of Cleco, installed respectively in the proper holes
diameter (usually 2.5, 3.2 or 4 [mm]). Remove a Cleco and add the solid rivet, chosen correspondent
with the hole diameter, and with a proper length exceeding the sheet of almost 1.5 times the solid
rivet diameter. Press the rivet properly and repeat the operation. Always control the result of the
special riveting process: check the head of rivet is pressing entirely and parallel to the skin, not
damaged, check the blind side of rivet, the bulb head, it must be strongly pressing the sheets and