12
Linhas aéreas Inteligentes
BOEING-SRM COMPOSITE
DAMAGE CLASSI
F
I
CATION
The term “damage”
as used i
n
th
e Structural
Repair Manual
and other Manuals, is defined
as includi
ng any and every
type of p
e
r
m
an
e
n
t deform
a
tio
n
o
r
alter
a
tio
n
to any c
r
oss
-
sectio
n of a
structural comp
o
n
e
n
t.
Deformati
o
n or alterati
on to the
cross-secti
o
n
of a structura
l
comp
o
n
e
n
t results fro
m
ma
ny ca
uses w
h
ich can be general
ly
categ
o
r
ize
d into four mai
n
gr
o
u
p
s
:
•
Mechani
cal action
-
includes brinelling, buckling,
burnishi
ng, burring, chafing,
cracking, distorti
on (twisti
ng),
erosion, fretting, ga
lli
ng, gouging, indent
ation, misal
ignment,
nicki
ng, rub
b
in
g, scorin
g
, scr
atching, and
gener
a
l wear
.
•
C
hemic
a
l or electro-chemical re
a
c
tion
-
inc
ludes
corrosi
on, pinholes, pi
tting, and scali
n
g.
•
T
hermal action
or cy
cli
n
g
-
includ
e
s b
r
ittle
ness, b
u
ckl
ing,
burni
ng, heating,
and pickup.
•
I
n
h
erent metallurgical characteristics
-
inclu
d
e
s col
d
shut, cre
e
p
(plastic fl
o
w
), fatig
ue (cyclic stre
ssing
), incl
usio
n,
and porosity. Damage cl
assified under the l
a
st
two categories
, in all areas,
is consi
d
ered as being non re
pai
r
able, and the structural
component must be replaced.
Dam
a
g
e
cl
assifie
d
u
n
der the first two cate
go
ries i
n
certain
specifi
e
d areas of the airpl
a
ne
structure, is consi
d
ere
d
as
bei
ng repai
r
able.
Investigatio
n of Damage
In order that the necessary
repa
ir
p
r
o
c
ed
ur
es c
an be
determi
ned, the type and extent of damage must be
pr
oper
ly
a
n
d t
h
or
oughly
inv
e
s
t
iga
t
e
d
.
In order to determi
ne the da
m
a
ge
categ
o
ry, the sus
p
ected
or affected are
a
m
u
st be p
r
e
p
ared by removing any foreign
matter de
p
o
sits from the co
mp
o
n
ent su
rface
,
cutting o
u
t
any broken, bent, heated, burn
t or otherwise obvi
ously
damaged areas of the component, and removing l
o
ose
rivets where apparent. •
I
n additi
on to the damaged or
affected area itself, any
adjacent attachment points
and! or connec
ti
ons, thr
o
u
g
h
which abnormal loads may have
been transmitt
ed, must be
fully investigated. •
I
f misalig
nme
n
t or twistin
g
of the a
ir
p
la
n
e
structur
e i
s
suspected, ali
g
nment and! or l
e
veli
ng checks must be
c
a
r
r
ied ou
t
.