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The TO rating will remain until all of the following conditions are met:
• The airplane is ≥ 400 feet above the runway
• The flaps/slats are retracted
• The pilot retards the thrust lever (Throttle Lever Angle (TLA) < 37°). This
condition does not apply when autothrottle is engaged
• Reduced Thrust Takeoff (FLX) Rating - The FLX mode is permissible when the
airplane weight and runway conditions are such that full TO rating is not required.
FLX thrust is implemented by the use of an assumed temperature higher than
ambient day temperature and is subject to the following:
• The use of FLX thrust is limited to airport elevations below 10,000 feet MSL
• The use of FLX thrust is at the pilot’s discretion
• Flex thrust does not result in any loss of function, failure warnings or takeoff
configuration warnings
• 75% of full rated thrust is used on all takeoffs
• Manually advancing thrust levers to MAX THRUST changes the rating from
FLX to TO
• Climb (CLB) Rating - After transition from TO or FLX to climb, the engine rating
will stay in CLB until reaching the cruise altitude
GX_17_045
EEC
CHANNEL
A
EEC
CHANNEL
B
DATA
ENTRY
PLUG
P20 P50
1.54
1.65
CRZ
EPR
1.54
1.65 AIRFRAME
ENGINE
P20
17-28 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
POWER PLANT
• After reaching initial cruise altitude, the rating will go back to CLB if a new climb
is performed (step climb)
• Cruise (CRZ) Rating - This rating will transition from CLB to CRZ after reaching
the Top Of Climb (TOC) altitude and the airplane speed has reached cruise speed
target within 1 knot or 0.005 Mach
• The rating will remain in CRZ as the airplane descends, until flaps/slats or gear are
selected down, at which point the rating will return to TO
• Maximum Continuous Thrust (MCT) - This rating is valid:
• When an engine is failed, the rating mode will transition out of TO and into
MCT instead of CLB or CRZ
• The rating will remain at MCT in the engine out condition, as long as the twin
engine rating would have been CLB or CRZ
• Manual Engine Rating - Any rating (TO, CLB, MCT, CRZ) but FLEX can be
selected on the FMS RATING Select page. This freezes the rating type
For Training Purposes Only
Sept 04
17-29
P I LOT T R A I N I N G GU I D E
POWER PLANT
FMS SELECTION (EPR)
To select EPR ratings on the FMS proceed as follows:
COMPARE FUEL QUANTITY
0DEPARTURE T.O.INIT0
000ACTIVE FLT PLAN 1/4
0BOW PASS/@ LB0
0/170
0055°00154NM
15820 (00+21
K0P0H0X00001152Z
SJN
0059°00121NM
15820 (00+15 .75M/10000A
CLS
ABQ
0ORIGIN
.75M/10000A
CLS
123456789012345678901234
GX_17_046
1. Press PERF function key and go to page 2/2 of the PERF INDEX.
COMPARE FUEL QUANTITY
0THRUST MGT T.O.INIT0
00OOOO0PERF INDEX 2/2
0BOW PASS/@ LB0
0/170
0INIT<–STORED FPL–>DATA
15820 (00+21
0K0P0H0X0001152Z
SJN
0FUEL MGT
15820 (00+15 .75M/10000A
S.E. RANGEO
ABQ
0INIT<––WHAT–IF–––>DATA
.75M/10000A
COMPARE FUEL QUANTITY
0THRUST MGT T.O.INIT0
00OOOO0PERF INDEX 2/2
0BOW PASS/@ LB0
0/170
0INIT<–STORED FPL–>DATA
15820 (00+21
0K0P0H0X0001152Z
SJN
0FUEL MGT
15820 (00+15 .75M/10000A
S.E. RANGEO
ABQ
0INIT<––WHAT–IF–––>DATA
.75M/10000A
2. Select THRUST MGT line select key.
COMPARE FUEL QUANTITY
0THRUST MGT T.O.INIT0
00 THRUST MANAGEMENT0010/010
0BOW
0/170
0 SYNC MODE
AUTO 1.65(TO)
N1
0FUEL MGT
15820 (00+15
S.E. RANGEO
ABQ
0 RATING MODE
ORS
ORO
ORO
COMPARE FUEL QUANTITY
0THRUST MGT T.O.INIT0
00 THRUST MANAGEMENT0010/010
0BOW
0/170
0 SYNC MODE
AUTO 1.65(TO)
N1
0FUEL MGT
15820 (00+15
S.E. RANGEO
ABQ
0 RATING MODE
ORS
ORO
ORO
3. Select applicable OR line select key on RATING line and set as required.
COMPARE FUEL QUANTITY
T.O.INIT0
00OOOORATING MODE 2/2
0AUTOBOW RETURN0
0/170
0TO 1.65
15820 (00+21
00000001152Z
OAUTO 1.65(TO)
SJN
1A5B8Q20 (00+15 .75M/10000A
.75M/10000A
1.58 MCTO
0CLB 1.60 1.58 CRZO
–.––EPR<–––MAN–––>N1––.–
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