Transcript Allison T56-A

Allison T56-A-15 Engine
Part 8
This lesson covers
the Engine Starting systems.
Issue 1
Engine Starting
Ground start
interlock relay
Start
button
Starter
valve
Nacelle
pre-heat
BASOV
4
Start
E
control
S
S
DC
ATM
under-freq
lock-out
relay
3
NRVs
Oil control
Start
circuits
Norm
‘T’ Handle
Pulled
Starter
valve
solenoid
Engine
anti-icing
solenoid
2
GTC
Fire shut-off valves
1
Engine Starting
Ground start
interlock relay
Start
button
Starter
valve
Nacelle
pre-heat
BASOV
4
Start
E
control
S
S
DC
ATM
under-freq
lock-out
relay
3
NRVs
Oil control
Start
circuits
Norm
‘T’ Handle
Pulled
Starter
valve
solenoid
Engine
anti-icing
solenoid
2
GTC
Fire shut-off valves
1
ATM Gen Control
ON
FIELD
TRIP
TRU
RESET
Start
ATM
Freq Ext AC ATM Gen Buttons
Sens Power Contactor Low Freq
Relay Relay
Relay
Time Delay
ON
FIELD
TRIP
OFF
FIELD
TRIP
RESET
C
C
C
OFF
AØ
BØ
CØ
ESSENTIAL DC BUS BAR
DC
ON
ESS AC
Bus bar
GRND
FAULT
SENSE
COILS
K10
TRIP COIL
OVR
K9
TRU
C
C
C
Low Freq
Lock-out
Relay
DPR
RESET COIL
OVERVOLT
SENSE
CIRCUIT
5 sec
C
C
C
volt
reg
OUT
From
K6
Manual
reset
DC
C
C
ATM
Gen
ATM Gen
Out Light
{
E
S
S
ATM
DC Gen Out
Light
RESET OFF
Power
Indicator
Relay
GRND
FAULT
SENSE
CCT
I
S
AC Bus-Off
O
Lights
L
A
T
E
ATM Gen D
DC
Control
ESS AC
Bus-Off
Indicator
Relay
ESS
AC
OFF
Under-frequency Lockout
ON
FIELD
TRIP
TRU
Start
ATM
Freq Ext AC ATM Gen Buttons
Sens Power Contactor Low Freq
Relay Relay
Relay
Time Delay
ON
FIELD
TRIP
RESET
OFF
FIELD
TRIP
RESET
K10
TRIP COIL
OVR
K9
OVERVOLT
SENSE
CIRCUIT
5 sec
TRU
C
C
C
Low Freq
Lock-out
Relay
DPR
RESET COIL
57(R) Sqn 5
C
C
C
OFF
AØ
BØ
CØ
ESSENTIAL DC BUS BAR
DC
ON
ESS AC
Bus bar
GRND
FAULT
SENSE
COILS
C
C
C
volt
reg
OUT
From
K6
Manual
reset
DC
C
C
ATM
Gen
ATM Gen
Out Light
{
E
S
S
ATM
DC Gen Out
Light
RESET OFF
Power
Indicator
Relay
GRND
FAULT
SENSE
CCT
I
S
AC Bus-Off
O
Lights
L
A
T
E
ATM Gen D
DC
Control
ESS AC
Bus-Off
Indicator
Relay
ESS
AC
OFF
Engine Starting
The starter valve opens slowly to progressively
load the GTC.
The starter valve limits air pressure to the
starter motor turbine to 54 psi.
The starter motor drives through a dog clutch
and the prop brake into the reduction gearbox.
Confirm starter valve closure by reference to
bleed air manifold pressure gauge and engine
TIT cut-back during subsequent starts.
Starting-Run, <16%
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Starting-Run, >16%, <65%
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Starting-Run, >16%, <65%
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
>16%, <65%, Fuel Px >50psi
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
>16%, <65%, Fuel Px >150psi
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Fuel Pumps
PARALLEL
SERIES
>16%, >65%, Fuel Px <150psi
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Ground Stop
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Ground Stop
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Enrich. Start-Run, <16%
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Enrich. Start >16%, <65%
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
>16%, <65%, Fuel Px >50psi
OFF
FUEL
ENRICHMENT
RELAY
NORMAL
FUEL
ENRICHMENT
SWITCH
FUEL
ENRICHMENT
VALVE
FUEL MANIFOLD
PRESSURE SWITCH
CONDITION
LEVER
MANIFOLD DRAIN
VALVE
IGNITION RELAY
TO FEATHER PUMP CONTROL RELAY
AIR
GRND
AIR
I
S TOUCHDOWN
GRND
RELAY
TOUCHDOWN
O
SWITCHES
L
DC
>
65%
<
28 VOLTS ESS DC
GRND. ST.
SW.
AIR
START
SW.
FEA & FUEL
S. OFF SW.
TO FEATHER CONTROL BOX
>
16%
<
OPEN
MOTOR
GROUND
STOP RELAY
SPEED SENSE
CONTROL
DC
IGNITION
CONTROL
SECONDARY PUMP
INDICATOR LIGHT
IGNITION
EXCITER
IGNITER
PLUGS
CLOSE
E
E
S
PARALLELING
VALVE
SECONDARY FUEL PUMP
PRESSURE WARNING LIGHT
SECONDARY PUMP
PRESSURE SWITCH
Enrichment
Burner Manifold
Pressure
switch
pick-off
Enrichment
valve
Enrichment
burst
fuel path
Use of Enrichment
The enrichment starting procedure is only
used for the second starting attempt if either
an airborne or cold weather start has failed
and the residual TIT is below 100oC.