Mooney M20R - Rear Spar Repair; Rib Repair; Wing Skin Panel Repair; Wing Tip Repair

SERVICE
D
NTENANCE MANUAL
M20R
MOONEY AIRCRAFT CORPORATION
Prime
angles,
plate,
and
spacer.
Rivet
parts
to$ether
using
wet
primer
on
all
rivets.
51-13-04
REAR
SPAR
REPAIR
o
ORIGINAL
The
rear
spar may
be
spliced
between ribs in
aecord-
RIVETS
ance
with
AC
43.13-1(
(Figure 51-9).
Ij
REPAIR FLANGE
EOGE OF REAR PIECE
00
100
ioo
SH51-IO
CP~
EDGE
OF REPLACED
FORWARI)
PIECE
RIB REPAIR
FIGURE
51-10
sHa-9
new
skin
panels
to
exactly
match
original
skin installa-
tion.
Preformed skin
panels
may
be
obtained from
any
Mooney
Service
Center.
REAR
SPAR
REPAIR
FIGURE
51-9
1.
Damaged
Dimple
Repair
Around
Inspection
Holes.
(Figure
51-11)
Repair
damaged dimples
around
51-13-05
RIB REPAIR
inspection
holes when:
(a)
there
are
three
or
more
cracked
adjacent
dimples,
(b)
the
crack
in
one or more
Replace
ribs that
are
severely damaged.
Minor
damage
of the
dimples
extends
beyond
radius of
dimple
into
may
be
repaired
as
shown
(Figure 51-10).
skin
and
(c)
when there
are
four
or more
cracked
51-13-06
WING
TIP
REPAIR
dimples
around
an
inspection
hole.
To
repair
severe
damage
to
wing tip
outboard of STA
To
repair
damaged dimples (a)
cut
a
doubler
from
193.5,
it
is advisable
to
replace
entire
tip
skin and rib.
same
material and
gauge
as
skin
to
be
repaired,
(b)
1.
Locate
new
tip
rib
in
exact
original tip
rib
pasition
drill
and countersink
100-degree
fastener
holes
in
to
prevent wing tip twisting.
Use
temporary
support
or
doubler
to match
dimpled
fastener
holes
in
skin,
and
locator
pins
to
maintain
correct
wing tip position.
(c)
install
doubler
around
inspection
hole. Use
AN426-
2.
Rivet
new
tip
rib
to
main
and
rear
spars.
AD4
rivets
when
material
is
.040
inch
thick
or
greater.
a.
Locate
new
skin,
and drill rivet
holes
through
skira
Drill
holes
using
a
No.
30
(.128
IN.)
drill
as
shown in
to
match
existing
hoses
in
ribs
and
stringers.
the
above illustration.
Use
AN426-ADa rivets
when
4.
Rivet skin
to
rib
at
STA
193.5.
material is
.032
inch
thick
or
less.
Drill
holes
using
a
5.
Roll skin back
on
lower
wing
surface
to
gain
ac-
NO.
40
(.098
IN.)
drill.
cess
to
stringers
for rivet
bucking.
Rivet skin
to
upper
2.
Repair
of
Cracks
Wholly
Within
Dimple
Radius.
stringers.
(Figure
51-12)
Surface
cracks
on
inside
(bearing)
face
6.
Rivet skin
to
tip
rib
starting
at
leading
edge.
Buck
of
dimple
that do
not extend
through
material
can
be
rivets
as
far back
as
possible.
repaired
by sanding
out crack.
Cracks
in
dimples
7.
Install
cherrylock (CR-2248)
blind
rivets
in
places
which
do
not
extend
beyond
dimple
radius
can
be
inaccessabre
for rivet
bucking.
Add
one
extra counter-
repaired by (a)
stop
drilling
crack with
a
No.
60
drill
sunk
blind rivet
between
every
other
pair
of
cherrylock
and
(b)
by
adding
rivets,
same
size
as
those
ire
original
rivets.
pattern,
to
each side of
cracked
dimple.
Maintain
four-
diameter
(4D)
spacing
and
two-diameter
(2D)
edge
dis-
51-13-07
WING SKIN
PANEL
REPAIR
tances.
When
original
rivet
pattern
has rivets
on
only
Repair
wing
skin
panels
as
prescribed
in
Ae
43.113-1(
one or
two
sides of
a
dimple,
only
one
or
two
rivets
unless
era
entire skin
panel
is
to be
replaced.
Install
need be
added.
51-13-04
Island Enterprises