Cessna Citation I & I/SP

650 Pound Gross Weight Increase

The Supplemental Type Certificate (STC) described in this literature provides an increase of 650 pounds in the useful load carried by the Citation I. This is accomplished by raising takeoff and ramp weight limitations and reducing the maximum zero fuel weight. It offers business jet owners and pilots a cost efficient way to improve the utility of their aircraft.

Until now the Citation I has had one major drawback -with full fuel you were limited to carrying no more than 4 passengers. Our new STC removes this restriction by increasing the useful load by 650 pounds. New Flight makes the Citation I a truly great airplane.

Standard
Citation I
  New Flight
Citation I
  7,424  lbs.
  Basic Operating Wt. (BCA, 4/85)  
  7,424  lbs.
  3,806  
  Full Fuel  
  3,806  
  11,230  
  Subtotal  
  11,230  
     
  770  
  Max Passenger/Baggage Wt.  
  1,420  
     
  12,000  
  Max. Ramp Wt.  
  12,650  
  11,850  
  Max. Takeoff Wt.  
  12,500  


"Does This Compromise Performance At Lighter Weights?"


Not at all! If the zero fuel weight (ZFW) is more than 9,100 pounds, the flight can be conducted at a maximum takeoff weight of 11,850 lbs., which is the standard Citation weight limit.

The approved operating weights for loading conditions are as follows:

  Condition A Condition B
 Maximum Zero Fuel Weight (lbs.)
  9,100  
  9,500  
 Maximum Ramp Weight (lbs.)
  12,650  
  12,000  
 Maximum Takeoff Weight (lbs.)
  12,500  
  11,850  




Comparison

  Noise Levels (EPNdb)
(JT15D-4 Turbofan)
 
Standard
Citation I
  New Flight
Citation I
86.2 Sideline 86.1
78.0 Takeoff 78.5
87.9 Approach 87.7


  Load Factor (G)
In flight
 
Standard
Citation I
  New Flight
Citation I
-1.52 to +3.80 at 11,850 lbs Flaps - Up Position (0°) -1.36 to +3.30 at 12,500 lbs
-0.00 to +2.00 at 11,850 lbs Flaps - T.O. & Appr. (15°) -0.00 to +2.00 at 12,500 lbs
-0.00 to +2.00 at 11,850 lbs Flaps - Land (40°) -0.00 to +2.00 at 11,850 lbs



Maximum Operating Temperature

Flaps 15° Takeoff
Field Elev. 11,850 lbs. 12,500 lbs.
     
  0  
  38°C  
  32°C  
  2000  
  31°C  
  21°C  
  4000  
  24°C  
  16°C  
  6000  
  15°C  
  5°C  
 
Flaps 0° Takeoff
Field Elev. 11,850 lbs. 12,500 lbs.
     
  0  
  45°C  
  38°C  
  2000  
  40°C  
  27°C  
  4000  
  30°C  
  21°C  
  6000  
  25°C  
  10°C  

Note:
Maximum operating temperature limited by second segment climb requirements. (Anti-Ice Off)
 



Takeoff Field Length (Over 35 Foot Obstacle)

Altitude = 0 ft
Temperature Weight (lbs) Distance (ft)
     
15°C 12500
11850
11500
  3812
2930
2760
 



20°C 12500
11850
11500
  4012
3110
2930
 



30°C 12500
11850
11500
  4592
3530
3320
 
 
Altitude = 1000 ft
Temperature Weight (lbs) Distance (ft)
     
15°C 12500
11850
11500
  4072
3090
2910
 



20°C 12500
11850
11500
  4316
3280
3090
 



30°C 12500
11850
11500
  4986
3740
3520
 


Altitude = 2000 ft
Temperature Weight (lbs) Distance (ft)
     
15°C 12500
11850
11500
  4372
3380
3180
 



20°C 12500
11850
11500
  4649
3600
3380
 



30°C 12500
11850
11500
  6520
4120
3860
 *
 
Altitude = 4000 ft
Temperature Weight (lbs) Distance (ft)
     
15°C 12500
11850
11500
  5085
3920
3690
 



20°C 12500
11850
11500
  6530
4200
3940
 *



30°C 12500
11850
11500
  -
5690
5260

 *
 *


Conditions:

Flaps T.O. & Appr. or Up (indicated by "*")
Anti-Ice Off
Wind 0 Knots
Landing Gear Down
Gradient 0 %
Operative Engine Takeoff Thrust
Inoperative Engine Windmilling After V1



Landing Gear Life Limits

Replacement life
   (full stop landings)   
Nose Gear Standard
Citation
New Flight
Citation
Equivalent
Life*
5542000-4 & -7 Nose Landing Gear Assembly
  28,500  
  19,600  
  688  
5511169-1 Actuator Fitting
  28,500  
  19,600  
  688  
5513056-3 Trunnion Support Left
  28,500  
  19,600  
  688  
5513056-4 Trunnion Support Right
  28,500  
  19,600  
  688  
2-690012-7,-9 & -11 Actuator Assembly (Decoto)
  26,100  
  19,000  
  728  
5542301-3 & -5 Trunnion
  24,000  
  16,800  
  770  
5542300-1 Fork
  19,700  
  11,800  
  599  
6-4017 Actuator Assembly (Western)
  18,300  
  13,300  
  730  
1523200-1 Actuator Assembly (Teijin Seiki)
  15,000  
  11,600  
  773  
         
Main Gear      
5541000-11 Main Gear Assembly, Left
  12,000  
  9,200  
  767  
5541000-12 Main Gear Assembly, Right
  12,000  
  9,200  
  767  
5522700-1 Trunnion Assemblies, Forward Left
  12,600  
  10,800  
  857  
5522700-2 Trunnion Assemblies, Forward Right
  12,600  
  10,800  
  857  
5522710-1 Trunnion Assemblies, Aft Left
  21,500  
  14,400  
  670  
5522710-2 Trunnion Assemblies, Aft Right
  21,500  
  14,400  
  670  
2-690011-3,-5,-9, & -11 Actuator Assembly L (Decoto)
  28,900  
  19,200  
  644  
2-690011-4,-6,-10, & -12 Actuator Assembly R (Decoto)
  28,900  
  19,200  
  644  
7-4016-1 & -3 Actuator Assembly L (Western)
  40,300  
  22,900  
  663  
7-4016-2 & -4 Actuator Assembly R (Western)
  40,300  
  22,900  
  663  
1523100-1 Actuator Assembly L (Teijin Seiki)
  15,000  
  9,800  
  653  
1523100-2 Actuator Assembly R (Teijin Seiki)
  15,000  
  9,800  
  653  


*Equivalent Life For Aircraft With Pre-Mod Landings


Airplanes which have landings prior to the modifications have the number of pre-mod landings reduced by an equivalent post-mod life as shown in the following example:

Example
An airplane with 1000 landings recorded in its log book installs the New Flight increased ramp and takeoff modification. The nose gear assembly (P.N. 5542000-4 & 7) is now limited to 19,600 full stop landings before replacement. However, because the 1000 landings were pre-mod landings, the equivalent life is 688 landings. Each landing after the modification must be counted as a full landing, and added to the 688 total.

If the airplane had 1700 landings prior to modifica-tions, the equivalent life would be ratioed as follows:

1170 landings would be entered in the aircraft log books in place of the 1700 landings, and each subsequent landing would be counted as a full landing. The nose gear assembly would be replaced when a total of 19,600 full stop landings was recorded.