Raytheon Beech Baron E55 - Troubleshooting Propeller Synchronizer

Raytheon
Aircraft
BEECH
BARON
55
AND
58
SHOP
MANUAL
TROUBLESHOOTING
PROPELLER
SYNCHRONIZER
TROUBLE
PROBABLE CAUSE
REMARKS
1.
Synchronizer
inoperative.
a.
Circuit
breaker
trips.
a.
Short
in
airplane wiring.
a.
Isolate
and
repair
faulty
component.
b.
Intermittent
readings
on
pins
b.
Intermittent short
or
open
b.
Repair
or
replace
magnetic
pickup.
1 3
or
1 5
(circuit
breaker
may
magnetic
pickup
in
governor.
also
trip).
c.
Left
governor
pickup gives
c.
Broken
or
grounded
wire
in
c.
Repair
or
replace
magnetic pickup.
open
or
short circuit
reading
on
magnetic
pickup
in
governor.
pins
1
5.
d.
Right
governor
pickup
gives
d. Broken
or
grounded
wire
in
d.
Repair
or
replace magnetic
pickup.
open
or
short
circuit
reading
on
magnetic
pickup
in
governor.
pins
1
3.
e.
Left
governor
coil
gives
open
e.
Broken
or
grounded
wire
in
e.
Repair
or
replace
broken
wire
or
replace
or
short
reading
on
pins
6
7.
coil.
Coil
defective.
governor.
f.
Right
governor
coil
gives
open
f. Broken
or
grounded
wire
in
f.
Repair
or
replace
broken wire
or
replace
or
short
reading
on
pins
4
7.
coil.
Coil
defective.
governor.
2.
Poor
synchronization.
a.
Pickup
voltage
exceeds
3.0
a.
Insufficient
pickup
to
a.
Reset
pickup
to
give
specified
voltage
volts
at
cruise
rpm.
flyweight
head
clearance.
output.
(See
Woodward
Governor
Bulletin
No.
33117.)
3.
Oil
leaks
from
magnetic
pickup
connection
in
governor
body.
a.
Defective
O-ring
between
a.
Replace.
pickup
and
lock
nut.
b.
Defective
gasket
under
lock
b.
Replace.
nut.
c.
Nut
loose.
c.
Tighten
to
25
inch-pounds.
d. Defective
pickup.
d.
Replace
pickup.
I
CAUTION
1
CAUTION
See
Woodward Governor
Bulletin No.
33117
Never
turn
pickup
into
flyweight
head.
Check
voltage
output.
E16
7-9