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procedure, consisting of motoring the engine prior to start, for a period of 30 seconds
at the maximum motoring speed achievable.
However, during all automatic starts, the FADEC will determine if the EDC procedure
is required and carry it out automatically. In both manual and automatic starts, it is
permissible to continue the starting operation immediately following the EDC
procedure, without performing a spool down of the engine.
TOTAL FUEL (LBS) 292OO
146OO O 146OO
N2
FF (PPH)
OIL TEMP
OIL PRESS
68.6
68O
45
71
ND
STAB
ITT
SYNC
DN DN DN
OUT
3O
GEAR
–TRIMS–
NL RUDDER NR
AIL
LWD RWD
7.2
NU
O.O
O
15
O
O
O.O
T/O
N1
SYNC
25.5
98.5 98.5
1.OO
1.55
TO
EPR
1.OO
1.55
15 36O
L ENG SHUTDOWN
END
TOTAL FUEL (LBS) 292OO
146OO O 146OO
N2
FF (PPH)
OIL TEMP
OIL PRESS
46.O
8OO
3O
35
ND
STAB
ITT
SYNC
DN DN DN
OUT
3O
GEAR
–TRIMS–
NL RUDDER NR
AIL
LWD RWD
7.2
NU
O.O
O
15
O
O
O.O
T/O
N1
SYNC
19.O
98.5 98.5
1.OO
1.55
TO
EPR
1.O2
1.55
15 45O
L ENG SHUTDOWN
END
GX_17_064
For Training Purposes Only
Sept 04
17-45
P I LOT T R A I N I N G GU I D E
POWER PLANT
AUTO START - AIR
The EEC will determine if an ATS ENVELOPE (≤ 249 knots) or a WINDMILL
ENVELOPE (≥ 250 knots) will be performed. The type of start will be displayed on
EICAS.
The air start sequence is initiated with the ENGINE START switch selected to RUN.
If ATS ENVELOPE (starter assisted air start) has been selected, the EEC will select
the SAV open, activate the starter motor, if N2 is below starter reengagement speed
(up to 42% N2).
If WINDMILL ENVELOPE has been selected, the EEC will not select the SAV open.
The EEC will activate ignition immediately and open the HPSOV if N2 ≥ 8%. At
approximately 45% N2, IGN will deactivate.
During an automatic start the EEC will perform all checks for starting anomalies. If a
fault is detected, the EEC will abort the start (EEC will not abort an airborne relight,
for hot starts). The crew can stop the start sequence anytime, by selecting the ENGINE
RUN switch to OFF.
MANUAL START - GROUND
The manual ground start sequence is as follows:
• Crew selects IGNITION switch ON
• Crew selects the START SELECT switch to CRANK for the appropriate engine
ATS ENVELOPE WINDMILL ENVELOPE
GX_17_065
ENG
RUN
OFF OFF
L R
ENGINE
ENG START
IGNITION
ON
AUTO
L CRANK R CRANK
GX_17_066
IGNITION
ON
GX_17_067
17-46 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
POWER PLANT
• At 20% N2, crew selects the ENGINE RUN SWITCH to ON. Fuel flow and light
off occur
• At approximately 45% N2, SAV closes automatically
Note:
The engine data quoted in this
example are approximate values.
GX_17_068
ENG START
AUTO
L CRANK R CRANK
N2
FF (PPH)
OIL TEMP
OIL PRESS
ITT
SYNC
2O.O
23O
28
18
O.4
T/O
N1
SYNC
98.5
1.OO
1.65
TO
EPR
15
I
G
N
START
N2
FF (PPH)
OIL TEMP
OIL PRESS
ITT
SYNC
2O.O
23O
28
18
2.5
T/O
N1
SYNC
98.5
1.OO
1.65
TO
EPR
26
I
G
N
START
ENG
RUN
OFF OFF
L R
GX_17_069
Note:
The EEC does not protect the engine
from overtemp or any start anomalies
during a manual start.
For Training Purposes Only
Sept 04
17-47
P I LOT T R A I N I N G GU I D E
POWER PLANT
During manual start, the EEC will not limit ITT, the crew has to abort the start in case
of starting anomalies. After completion of the manual start sequence, the crew select
IGNITION to Normal and returns the START SELECT switch to AUTO.
ENGINE SHUTDOWN
The normal engine shutdown sequence is as follows:
• Place thrust lever in Idle position
• Place ENGINE RUN switch to the OFF position, when engine has stabilized at
Idle. Normal procedure is to stabilize engine at Idle for a 3-minute period
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