Mooney M20M - Installation

MOONEY
AIRCRAFT CORPORATION M20M SERVICE
AND
MAINTENANCE MANUAL
size
to
match the
oversize
dimple
and install the
next
(1)
A rivet
head will be
considered
open
if
.001
standard
size
larger
diameter
rivet
of the
same
type
feeler
gauge
can
be
inserted
between the head of
the
and
material
as
the
original
rivet.
Dimples
in
75S-T6 Rush
or
protruding
head
rivet
and the
top
skin. The
top
must
be
hot formed
when
reworked. of
a
flush
head
rivet
must not
be below
the
skin
in
(3)
Combined Countersink and
Dimpled
Joint.
If
which it is
installed
by
a
dimension
of
more
than
.004.
the
edge
distance
is
a
minimum
of
two
times the D. RIVET HOLE
TOLERANCE.
diameter
of the
next
standard
size
larger
diameter
(1)
An
enlarged
hole
is
defined
as
having
an
rivet,
it
will be
permissible
to
rework the smaller
intemal
diametric dimension
in
any
direction
which
countersink
or
dimple
to
a
size
to
match the oversize
exceeds
the
sum
of the drill diameter
normally
used
dimple
or
countersink
and
install the
next
standard size
plus
ten
percent
of the diameter of the
rivet
shank.
larger
rivet
according
to
paragraph
2,
A
(4). Dimples
in
75S-T6
must
be hot formed when reworked.
(2)
The
following
table
specifies
the
maximum
acceptable
diametric
dimensionsfor
the
various rivet
C. RIVET HEAD
TOLERANCE.
sizes
that
occur
in
multiple
layer
assemblies
which
are
"drilled
on
assembly".
NOMINAL
MAX.
ACCEPTABLE
RIVET
SIZE
DRILL SIZE DIAMETRIC DIMENSION
AN470AD3
or
AN426AD3
#40
(.098 dia.)
.108
in.
AN470AD4
or
AN426AD4 #30
(.1285
dia.)
.141
in.
(3)
When
a
hole
becomes
enlarged beyond
the
6.
SPOT WELD REPAIR
acceptble
diametric limit and the
prescribed
rivet
cannot
MS20470-AD4
or
MS20426-AD4
rivets
may
replace
be
used,
the
next
larger
diameter
rivet
may
be used
if
spotwelds, (1)
per
spotweld,
head side
double
flush
(a)
four-diameter
(4D)
rivet
spacing
is
maintained and if
requirements
determined
by
form,
fit function of
(b)
two-diameter
(2D) edge
distance is
maintained.
assembly.
Contact
Mooney
engineering
department
3.
BLIND RIVET
INSTALLATION.
Ordinarily,
where
prior
to
beginning
repair.
rivet
bucking
is
impossible,
CherryLock
(CR-2248
and
CR-2249)
ri~vets
may
be substituted
for AD rivets
to
51’11-00
-RESERVED
repair
skins
and
structural
members.
However,
consult
51-12-00
FUSELAGE REPAIR
the
MAC
Customer
Support Department
or a
representative
of the Federal
Aviation Administration
51-12-01
-TUBULAR
STRUCTURE REPAIR
before
using
blind-type
or
hollow rivets in
primary
structure.
Check tubular
structure
annually
for corrosion and
damage.
Interior
panels
may
require
removal
to
gain
CAUTION
access
to
areas
which
are
difficult to
inspect.
The
use
of blind
rivets
normally
require
more
frequent
inspection
of the
area
where
used.
Inspect
for
Refer
to
AC
43.13-1(
for
tubular
frame
repair
evidence
of
loosening
of the
rivet(s)
or
crack
P’ocedures.
Warped
or
bent tube members
can
often
development
that
may
cause
deterioriation
of structural
be
straightened;
however,
ail
surrounding
welds
should
integrity.
Solid rivet
replacement
of blind
rivets
is
be
dye
checked
for cracks
after
tube
straightening.
recommended
at
earliest
possible
maintenance.
Use
proper
material
when
making
weld
repairs.
Check
existing
rivet
hole
size
before
installing
blind
Welding
rod,
meeting
the
requirement
of
specification
rivets.
When hole is
marginal,
use
the
next
larger
size
MlL-R-5632,
class
2,
is
recommended for
oxyacetylene
rivet
to
assure
firm attachment.
welding.
Electrodes
meeting
the
requirement
of
specification
MIL-R-5632-A,
class
2,
MIL-E-23765/1C
4.
"AN"-
BOLT,
NUT
AND WASHER
L~ee
65,
Linde
32
or
Page
AS-35)
are
recommendedMIL-70S-2)
or
AWS
A5.18-69,
class
E70S-2
(IE.
INSTALLATION.
To
compensate
for material thickness
tolerances,
the
length
of AN bolts
may
be increased
or
for non-heat
treated
parts,
inert-gas
shielded-are
decreased
by
one
dash
number
from
prescribed
welding
(Heliarc).
Use
AISI
4130
condition N
steel for
length.
AN960
regular
washers
and AN960L thin
replacement
and
repair
of
tubes,
and for
making
repair
washers
may
be
used
interchangeably
for
proper
bolt
sleeves.
Replacing
a
member
or
subassembly
is
often
and
nut
installation.
advantageous
and
more
feasible
than
repair.
All detail
One
regular
washer
or one
thin
washer
may
be added
to
tubes
or
assemblies
needed
for
replacement
can
be
any
bolt installation.
Washers
may
be used
under
the
purchased
from SERVICE PARTS
DEPARTMENT,
bolthead
and/or
under
the
nut.
AN365
and AN363
nuts
Mooney
Aircraft
Corporation,
Louis
Schreiner
Field,
may
be
used
interchangeably.
The
AN363
nut
is
Kerrville,
Texas
78028.
acceptable
for
higher operating
temperature
installations.
1.
WELDED PATCH
REPAIR OF LOCAL
DAMAGE.
5.
HI-SMEAR
RIVET
INSTALLATION.
When
a
Use
a
welded
patch
to
repair
dents,
small
holes,
and
hi-shear
rivet
pin
of
the
prescribed
length
is
not
cracks
no
longer
than
the outside diameter
of the tube
available,
the
next
longer
length
pin
may
be
used with
and
covering
a
maximum of
1/4
of
the
tube
cadmium-plated
steel
washers
to
adjust
the
pin grip
circumference.
length.
The combined
washer
thickness
shall
not
exceed .096
inch.
4-99
51-11-00
OLDWILLWAYNE