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6,123 kg
All weights in excess of Maximum Zero Fuel Weight
must consist of fuel.
MAXIMUM ALLOWABLE TAKEOFF WEIGHT
The takeoff weight is limited by the most restrictive of the following requirements:
• Maximum Certified Takeoff Weight.
• Maximum Takeoff Weight (Climb or Brake Energy Limited) for
altitude and temperature as determined from the applicable figure
entitled TAKEOFF WEIGHT LIMITS in Section V.
• Maximum Takeoff Weight for the runway and ambient conditions
as determined from the applicable figure entitled TAKEOFF
DISTANCE in Section V.
• Maximum Takeoff Weight for obstacle clearance as determined
from the applicable TAKEOFF FLIGHT PATH and CLIMB
GRADIENT figures in Section V, if required.
NOTE
NOTE
Change 17
Learjet 31A AFM Limitations
FM-121 1-3
FAA Approved 7-25-91
Change 23
WEIGHT AND C.G. LIMITS (Cont)
MAXIMUM CERTIFIED LANDING WEIGHT
• Aircraft 31-035 thru 31-190, and 31-192 not modified by
SB 31-8-1......................................................................15,300 Pounds
6,940 kg
• Aircraft 31-191, 31-193 and subsequent, and prior
aircraft modified by SB 31-8-1......................................16,000 Pounds
7,258 kg
MAXIMUM ALLOWABLE LANDING WEIGHT
The landing weight is limited by the most restrictive of the following
requirements:
• Maximum Certified Landing Weight.
Perform Hard or Overweight Landing Inspection
(Chapter 5, Learjet 31/31A Maintenance Manual) if
Maximum Certified Landing Weight is exceeded.
• Maximum Landing Weight for the runway and ambient conditions
as determined from the ACTUAL LANDING DISTANCE
and FACTORED LANDING DISTANCE (if applicable) charts in
Section V.
• Maximum Landing Weight (Approach Climb or Brake Energy
Limited) for altitude and temperature as determined from the
applicable figure entitled LANDING WEIGHT LIMITS in Section
V.
CENTER-OF-GRAVITY
The center of gravity of the airplane, as loaded for flight, must be maintained
within the CENTER-OF-GRAVITY ENVELOPE defined in
Figure 1-1, 1-2 or 1-2A as applicable.
NOTE
Change 23
Limitations Learjet 31A AFM
1-4 FM-121
FAA Approved 7-25-91
Change 17 Change 17
CENTER-OF-GRAVITY ENVELOPE
Standard 15,500 Lb (7031 Kg) Takeoff Weight
Forward Flight Limit — F.S. 368.29 (4.0% MAC) for all weights up to and including
12,000 pounds (5443 kg) and tapers through F.S. 376.00 (13.63%
MAC) at 15,500 pounds (7031 kg) to F.S. 376.55 (14.32% MAC) at 15,750
pounds (7144 kg).
Aft Flight Limit — F.S. 381.11 (20.0% MAC) for all weights up to and including
9,000 pounds (4082 kg), tapers to F.S. 388.95 (29.8% MAC) at 12,500 pounds
(5670 kg), and remains at F.S. 388.95 (29.8% MAC) up to and including
15,750 pounds (7144 kg).
Figure 1-1
9
5 10 15 20 25 30 35
10
11
12
13
14
15
16
17
CENTER-OF-GRAVITY — % MAC
WEIGHT — 1000 POUNDS
40
45
50
55
60
65
70
75
WEIGHT — 100 KG
Max Ramp Weight
Max Takeoff Weight
Max Zero Fuel Weight
13.63% MAC
F.S. 376.00
29.8% MAC
F.S. 388.95
4.0% MAC
F.S. 368.29
14.32% MAC
F.S. 376.55
Learjet 31A AFM Limitations
FM-121 1-4A
FAA Approved 7-25-91
Change 17
CENTER-OF-GRAVITY ENVELOPE
Optional 16,500 Lb (7484 Kg) Takeoff Weight
Forward Flight Limit — F.S. 368.29 (4.0% MAC) for all weights up to and including
12,000 pounds (5443 kg) and tapers through F.S. 378.21 (16.38%
MAC) at 16,500 pounds (7484 kg) to F.S. 378.76 (17.07% MAC) at 16,750
pounds (7598 kg).
Aft Flight Limit — F.S. 381.11 (20.0% MAC) for all weights up to and including
9,000 pounds (4082 kg), tapers to F.S. 388.95 (29.8% MAC) at 12,500 pounds
(5670 kg), and remains at F.S. 388.95 (29.8% MAC) up to and including
16,750 pounds (7598 kg).
Figure 1-2
9
5 10 15 20 25 30 35
10
11
12
13
14
15
16
17
CENTER-OF-GRAVITY — % MAC
WEIGHT — 1000 POUNDS
40
45
50
55
60
65
70
75
WEIGHT — 100 KG
Max Ramp Weight
Max Takeoff Weight
Max Zero Fuel Weight
16.38% MAC
F.S. 378.21
29.8% MAC
F.S. 388.95
4.0% MAC
F.S. 368.29
17.07% MAC
F.S. 378.76
Change 17
Learjet 31A AFM Limitations
FM-121 1-5
FAA Approved 7-25-91
Change 17
CENTER-OF-GRAVITY ENVELOPE
　
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