Mooney M20R - Cracks in Surface Areas

SERVICE
AND
MAINTENANCE
MANUAL
M20R
MOONEY
AIRCRAFT
CORPORATION
1.
Materials
used for
repairs
shall
be
as
sp~cified
tent.
Must
be
added
to
the
base
resila
(cowling
and air
and
compatible
with
the
basic
resin
used
In
the
intake
duct
assemblies).
fiberglass
laminate.
The
manufacturer’s
bulletins
shall be
followed
for
all
Resin
Aerospace
Adhesive
EA934
Part
A
mixing
ratios
and
preparation
prior
to
application.
Catalyst
Aerospace
Adhesive
EA934
Part B
2.
General.
Hysol
Division
A.
The
configuration
of
repairs
are
shown
for
flat
The
Dexter
Corporation
surface
areas;
for
simplicity;
however,
the
same
techni-
ques
can
be
used
for
contoured
surfaces.
Contoured
Patternates:
repairs
will
require
additional
considerations
and the
Resin
Epoxical
#606
Patching
Adhesive
proper
shaping
of
the
backup
plates
used
for
clamping
Resin
the
laminates
together during
the
curing
cycle.
Catalyst
Epoxlcal
#606
Patching
Adhesive
B.
The
degree
of
laminate
chamfer
and
size
will
Hardner
vary
based
on
accessibility, shape
of
part
and
the
ex-
United States
Gypsum
tent
of
damage.
OR
51-15-01
CRACKS,
IN
SURFACE
AREAS
Resin
Ren
Epoxy
CG
1304
1.
Stop
drill
all cracks
per
standard
aircraft
proce-
Catalyst
Ren
Hardener CG
1304
dure.
Ren Plastics
Co.
2.
Remove
any
loose
particles
and
frayed
fiberglass
Lansing, Michigan
strands from
the
cracked
portion.
Fire
retardation
Antimony
Trioxide
for
fire
retarciation,
3.
Prepare
surface
for
repair
as
shown
in
(Figure
5%
minimum;
40%
maximum
by
Weight
of
Resii
Con-
51-201
Figure 51-21,
and
Figure
51-22).
STOP
DRILL
I
´•-;J i
t
CRACK
I´•
I´•´•-´• ´•´•´•´•´•r-~t--
OUTLINE
OF
CHAMFER
AREA
´•...........I
1.5"
ii-
---i
CRACK
1.5"
-i--
CHAMFER
1.5"
EACH
SIDE
OF
CRACK
FINISHED
SURFACE
THICKNESS
.02
TO
.04
A
B
i
C
D
O
i
I
FINISHED
SURFACE
MASKING
TAPE
-r
THICKWESSLAMINATE
SM51-20
NON-STRUCTURAL
REPAIR
FIGURE
51-20
51-15-01
18
Island Enterprises