CESSNA AIRCRAFT
COMPANY
SINGLE ENGINE
STRUCTURAL REPA
IR MANUAL
(3) Drill nearly through the head of the rivet using a drill the same size as the rivet shank.
(4) Break off rivet head, using drift pin inserted into the drilled hole as a pry.
(5) Drive out remai
ning rivet shank with a pin having a diameter equal to the rivet shank.
C. Installation of Blind Rivets.
(1) Refer to Figure 2, for an illustration of installation procedures.
(2) Check that rive
t hole size and rivet are compatible.
(3) Check that proper pulling head is installed on rivet gun.
(4) Adjustment of pulling head must be made in accordance with manufacturers instructions.
(5) Check that prope
r operating air pressure is available to rivet gun.
NOTE: Blind rivets may be installed using pneumatic or mechanical guns, whichever is
available.
(6) Check that holes in parts to be fastened are properly aligned.
(7) In blind clearan
ce applications, check the minimum blind clearance (BK) dimension if the
manufactured head of blind rivet is protruding above the top sheet. The rivet will pull down the
sheet as the stem is pulled if the BK dimension is met or exceeded.
(8) The minimum bli
nd clearance is the BK dimension, and is listed in the manufacturers standard
sheets.
NOTE: When installin
g a blind rivet (pull-type rivet) in a hole where the previous blind rivet
was removed by drilling and punching the rivet out, inspect the drilled hole to assure
all metal sheets are in place and not separated prior to pulling rivet. It may be
necessary to i
nsert a stiff wire in adjacent hole to hold metal in position while pulling
rivet.
(9) When placing p
ulling head on rivet stem, hold riveter and pulling head in line with axis of rivet
while holding tool in a light and flexible manner.
(10) When tool is actuated, pulling head will pull down and seat against rivet head.
(11) Clamping acti
on will pull sheets together and seat rivet when tool is actuated.
(12) When tool is actuated, action of rivet will automatically assist in bringing tool and pulling head
into proper alignment with rivet axis.
NOTE: Pressing down with force will not allow rivet and tool to align themselves with hole
and could limit head setting of rivet, however, enough force to seat the head against
the skin is nec
essary.
(13) Hold tool in line with rivet as accurately as possible, and allow a steady but light pressure; pull
trigger and l
et the rivet align itself.
(14) When rivet is completely installed, release trigger and pulling head will eject pulling portion of
stem through forward end.
(15) Rivet must bre
ak within these limits.
Fastener Dash number
Stem Flushness
NAS1738 or NAS1739
All +0.010 or -0.020 inch
Cherry Max -4 +0.010 or -0.
015 inch
Cherry Max
-5, -6 +0.010 or -0.020 inch
(16) Protruding stems usually indicate incorrect grip length or oversize holes.
D. Loose or Wor
king Blind Rivets.
(1) Blind rivets which are found to be loose or show evidence of working must be replaced with
rivets of like size and type. In some instances, it may be necessary to use the next larger size
rivet. Loos
e fasteners may be indicated by the following situation:
(a) The fastened material moves relative to the fastener. Skin deflection is evident.
51-40-00 Page 8
© Cessna Aircraft Company Jun 1/2005
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