Mooney M20R - Dents; Repairs for Welded Assemblies; Split-Sleeve Splice Diagram; Tension Fitting Replacement

MOONEY
AIRCRAFT
CORPORATION
M20R
SERVICE
AND
MAINTENANCE MANUAL
C.
Select
a
tube
with
an
outer
diameter
equal
to
F.
Install
replacement
tube
over
inner
sleeve
al-
inner
diameter of
tube
to
be
repaired
and
with
same
lowing
a
1/8
inch
gap
for
welding
between
original
and
replacement
tubes.
wallthickness.
G. Weld inner sleeve
to
tube
stubs
through
the
D.
Cut tube
to
length,
five times outer
diameter
of
1/8
inch
gap,
forming
an
overlayed
bead
across
gap.
tube to
be
spliced.
H.
Rosette
weld
replacement
tube
to
inner
sleeve
E.
Install inner sleeve
in
tube
to
be
repaired
so
in
two
or more
places.
that
its outer
end is
one
and one-half of
original
tube 3. SPLIT-SLEEVE SPLICING.
Use
split-sleeve! splice
diameter from
nearest
end
of the
diagonal
cut;
secure
to
repair
a
damaged
tube
when
parts
on
each side of
in
position
with
a
rosette
weld
on
each
side
at
one-half the
damage
cannot
be
separated
to
insert
an
inner
original
tube diameter from
inner-sleeve end. sleeve
(Figure 51-3).
WELD
HERE FIRST
t
ROSLITL
WELOS?
-1 IC1/1IN
4
-f
FOR WELDING
300
1/8 IN, GAP
1-1/2A1-1/2A
SPLIT-SLEEVE SPLICE
FIGURE
51-3
A.
Form
split
sleeve
from
steel tube
or
sheet steel
F.
Insert inner
sleeve
in
tube
(C)
and weld
in
when
outside diameter of
original
tube
is
less than
one
place
as
shown
(Figure
51-4).
inch.
5. REPAIRS FOR
WELDED
ASSEMBLIES
General.
B.
Form
split
sleeve
from sheet steel when
out-
This
section does
not
apply
to
any
control
system
side diameter of the
original
tube is
one
inch
or more.
tubing
or
assemblies,
engine
mounts
or
heat treated
C.
Form
split
sleeve from
same
material
(AIS[
steel
components
(except
as
stated
below).
4130
steel,
condition
N)
with
at
least
the
same
gauge
A.
Small
holes
up
to
a
#20
drill
may
be csosed
by
as
original
tube.
weeding
with
the inert
gas
shielded
are
method.
D.
Allow
a
1/8
inch
gap
between sleevehalves for
B.
Nicks and drill
marks
that
are no
longer
than
welding.
E. Weld
parallel
edges
of sleeve
to
original
tube
118"
and do
not exceed
four
percent
of
wall
thickness,
through
1/8
inch
gaps.
in
depth,
after
cleanup
may
be
smoothed
out and
F.
Weld
center
of each
sleeve half
to
original
tube
reprimed.
Nicks, holes,
and
cracks that wils
clean
up
with
two
rosette
welds
spaced
one
original
tube
diameter
apart.
with
a
#20
drill
may
be
drilled and
repaired
per
item
A.
C.
The
repair
of
weld beads
on
hed-treated
as-
4.
TENSION FITTING REPLACEMENT
(Figure 51-4).
A.
Cut
tubes
(A)
and
(B)
loose from tension
fitting
semblies
may
be
accomplished
without
reheat
treat-
340034-7,
-8
at
welds,
ment
within
the
following
limits.
B.
Cut
existing
tube
(C)
at
a
30
degree angle
(1)
The
repair
bead
will
not exceed
.375
ire
seven
inches from bottom of tension
fitting,
length
or
1/3
of total
length
of
weld,
whichever
Is the
C. Cut
a
replacement
tube
(C)
at a
30
degree
lesser.
angle
and
at
an
appropriate length
to
position
tension
(2) Only
one
repair
per
wesd
bead
is allowed.
fitting.
Weld
tension
fitting
in
proper
position.
6.
REPAIR
OF
SPOT
WELDS.
Failed
spot
welds
on
D.
Drill
four
1/4
Inch holes
for
rosette
welds,
1.9
aluminum
may
be
repaired
by OnstaOlingan
8D47(a-41
inches from
center
of
30
degree
cut.
rivet
through
weld
if
damaged
area
will
clean
up
with
a
E.
Make
an
inner sleeve five inches
song
from
#30
csrils.
4130
steel
tube,
condition
N,
with
outside diameter
to
7.
DENTS. Small
dents which
do
not exceed
five
match
inside diameter of tube
(C)
and
with
a
.085
inch
percent
of
the
diameter of the
tube,
in
depth,
and
are
wall thickness.
no
songer
than
one-half tube diameter
are
acceptable.
51-%2-66
Island Enterprises