cruising flight.
If
the
proble~
d~es
not
cle~
~p
in
~~ve~al
_
Jl!inutes, de-
termine
if
a
richer
mixture
setting will
produce
smoother
operation. H
not, proceed to the
nearest
airport
for
repairs
using
the
BOTH position
of the ignition switch
unless
extreme
rou~hness
d~ctate
.
s
t~e
use
of a single
ignition
i;><>sition.
MAGNETO
MALFUNCTION
~
'
•,
' I • . I '
.,
' ,. •
. A sudden .engine roughnes.s
or
misfiring
is
usu3lly evidence of mag-
neto
problems.
, Switching_
from
BOTll to
either
L
or
·R
igniti~~
swit('.h
.·
position will. identify
whicn
magneto
1s
·'ma:ffunctioning •' Select _differ<ent
power settings and enrichen
the
mixture
to
determine
if
continued opera-
.
tioI_l
_ oh
BbTH
n:i~netos
is
practicable.
-:
If
not,
. sWitch
t~
_the good magneto
and proceed to the
nearest
airport
for
repairs.
: ;
-
~
.
_1_; t t .)'\
~
..
~
· • r
.:
-
\..
"'
LOW
OIL
PR
:
ESS
iJ
RE.
_ - .
-
'~
..;
. . , _ • ' I •
",
• • · •
_,
. ' • ' • •
_,
•
,.
• '
>
If
!Ow
oil
pr~~
_
sure
is
accompruued,by.
norµ}3.I
oif
tempei;ature, there
•
-...
•
,.
• • .
..
.,
~
;-
•
.>
• >
~_,
A 1 ·
~
• • • • • • •
~
: • • •
..
~s
·
_
a
poss1b1hty the
011
pressu:r,e
gag_e
or
·rehef;yal:v:e
~s
m~chomng.
-
A
leak iii the line to· the gage
is
not
necessarily
cause
f9r
an
immecija~~
pre-
caritionarf
laniling
oec
'
ause
·
an
'
orifice
iii
this
line
will prevent ·a 'suddeni \
loss
·of oil
fro
}ii
.the
""
engine
~limp.
However, a
\anding
at
the
'
nearest
air-
pon
\voi.tldoe
1i!
visable to
inspect
the
source
-of
trouble.
.
·_.
,
...
,
...
~
.
~
.
t.
!
--:
; . #
_.
r . . t " - •
I.
·
If
a total
'·
icrss of oil
;ressure
'
is
a~companied
by a ris'e
in
oil tempera-
tur-e,
there
is
.good
reison
to
suspect
an engine
failure
is
imminent. ··Re-
duce engine power immediately and
select
a
suitable
forced
landing field.
Leave the engine running
at
low
power
dur!ng
the
appr9_ach, using
only
the
minimum power
required
to
reach
the
desired
touchdown spot.
I •
..i
...
J
,.
,_
0:
! ,,. : • •' • • I
..
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f
. ..
...
~
• J - , . l
ELECTRICAL
POWER
SUPPL
y
SYSTEM
MALF
-
~Ncr10NS
.
. ·
Malfunctions
in
the
electrical
power supply
system
can be detected
by
periodic monitoring of
th~
ammeter
and
over-voltage
warning light;
how-
ever, the cause of ·the.se malfunctions
is
usually
diffibllt
to
determine~
A
broken
alterMtor
drive belt
or
Wiring
is
most
likely the
cause
of alterna-
to.r
failu~es,
.alt'1ough
other
fact~rs
coulct
c~use
the
problem.
A
damaged
·
or
improperly. adjusted
voltag~
.
regulator
can '
also
cause
malfunctions.
-.
Pro
,blems of
t~s
~t~r~
c'pnstitutC-
an
:
el~Ct:t"icil
e~ergency
'
and:
shoUid
be
aealt
\titii 'immecqateJy. . :Electrical power. malfunctions usually_ fall ·into
two
cat~gorles:
ekc'essive
rate
o~
charge
arid insufficient
rate
of
~harge.
,,
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..
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• '
..
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... •
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• t;;: . ..... t--·
3-8
)
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