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PILOT’S AND COPILOT’S
AIRSPEED/MACH INDICATORS
Barber Pole pick-up at .......... VMO/MMO
STANDBY
AIRSPEED/MACH INDICATOR
Red Line ...................................... 325 KIAS
Barber Pole .................................... 0.78 MI
CABIN ALTIMETER/DIFFERENTIAL PRESSURE
Green Arc ................................ 0 to 9.4 PSI
Yellow Arc ............................ 9.4 to 9.7 PSI
Red Line .............................. 9.7 to 10.0 PSI
OIL PRESSURE
Red Line (Min.) ............................... 25 PSI
Yellow Arc ............................... 25 to 38 PS
Green Arc ............................... 38 to 46 PSI
Yellow Arc .............................. 46 to 55 PSI
Red Line (3 Minutes Max.) ........... 55 PSI
160
KNOTS
60
80
100
120
140
180
200
250
300
350
400
MACH
IAS
BENDIX/KING
0 6
10
12
14
16
25 20
30
35
40
.8
.5
.7
.6
.9
DIFF
2
3
4
6 5
7
8
9
10 5
10
20 15
25
30
40
50
1000
FT
CABIN
ALT
PRESS
OIL
PRESS
PSI
L R
25 25
55 55
75 75
40 40
Change 12
Learjet 31A AFM Limitations
FM-121 1-25
FAA Approved 7-25-91
Change 28
TURBINE SPEED (N2)
Green Arc ................................ 48% to 100%
Yellow Arc .......................... 100% to 103%
(One minute limit)
Red Line ............................................ 103%
TURBINE TEMPERATURE (ITT)
Green Arc ......................... 230°C to 832°C
Yellow Arc .......................... 832° to 860°C
Red Line ........................................... 860°C
(Refer to Figure 1-5 and Figure 1-6)
FAN SPEED (N1)
Green Arc .............................. 24% to 100%
Yellow Arc ............................ 100% to 103%
(One minute limit)
Red Line ............................................ 103%
OIL TEMPERATURE
Green Segment .................. 30°C to 127°C
Yellow Segment .............. 127°C to 140°C
Red Line ........................................... 140°C
Do not exceed 127°C
below 30,000 feet.
OIL
TEMP
C
L R
80 80
130
180
30 30
180
130
NOTE
Change 28
Limitations Learjet 31A AFM
1-26 FM-121
FAA Approved 7-25-91
PITCH TRIM
Takeoff Range ...................... 5.75° to 8.75°
ELECTRIC POWER MONITOR
AC VOLTAGE
Normal Range ................................................................. 110 to 130 VOLTS
Amber Range .................................................................... 90 to 109 VOLTS
and 131 to 134 VOLTS
Red Range ...................................................................... Below 90 VOLTS
and Above 135 VOLTS
DC VOLTAGE
Normal Range ................................................................ 22 to 29.5 VOLTS
Amber Range ................................................................... 18 to 21.9 VOLTS
and 29.6 to 31.5 VOLTS
Red Range ........................................................................ Below 18 VOLTS
and Above 31.5 VOLTS
DC AMPERES
Normal Range ..................................................................... 0 to 325 AMPS
Amber Range .................................................................. 326 to 400 AMPS
Red Range ...................................................................... Above 400 AMPS
9
7
5
NDN
NUP
PITCH
T.O. TRIM
AFT
FWD
VDC
2 5 0 AMP 2 5 0
115 VAC 115
2 8 . 5
Learjet 31A AFM Limitations
FM-121 1-27
FAA Approved 7-25-91
Change 4
OXYGEN PRESSURE
Green Segment .............. 1550 to 1850 PSI
Yellow Segment .................... 0 to 300 PSI
Red Line ....................................... 2000 PSI
HYDRAULIC PRESSURE
Yellow Segment .................. 0 to 1000 PSI
Green Segment .............. 1000 to 1750 PSI
Red Line ....................................... 1750 PSI
EMERGENCY AIR
Yellow Segment .................. 0 to 1800 PSI
Green Segment .............. 1800 to 3000 PSI
Red Line ....................................... 3000 PSI
If air bottle is serviced
near the high end of yellow
segment (slightly
above 1800 psi), pressure
may drop during
flight as the system
cools; satisfactory gear
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