Piper Navajo PA-31 Service Manual page 73

2-65 CHERRYLOCK RIVETS. REMOVAL. (Refer to Figure 2-16.) Should it be necessary to remove an
installed cherrylock rivet, the following procedures are recommended.
a.
In thick material remove the lock by driving out the rivet stem. using a tapered steel drift pin (See
View 1).
NOTE
Do not drill completely through the rivet sleeve to remove a rivet as
this will tend to enlarge the hole.
b.
If the rivets have been installed in thin sheets, driving out the locked stem may damage the sheets. It
is recommended that a small center drill be used to provide a guide for a large drill on top of the rivet stem. and
the tapered portion of the stem be drilled away to destroy the lock (See Views 2 and 3).
c.
Pry the remainder of the locking collar out of the rivet head with the drift pin (See View 3).
d.
Drill nearly through the head of the rivet, using a drill the same size as the rivet shank ( See View 4).
e.
Break off rivet head. using a drift pin as a pry (See View 5).
f.
Drive out the remaining rivet shank with a pin having a diameter equal to the rivet shank (See View
6).
Figure
-16. Removal of Cherrylock Rivets
3.
Figure 2-16. Removal of Cherrylock Rivets
4.
5.
6.
Added: 9/23/80
HANDLING AND SERVICING
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