# Single Engine 

# MODIFICATION KIT

July 20, 2010 MK400-27-01A
TITLE RUDDER HINGE AND BRACKET INSTALLATION

EFFECTIVITY Model Serial Numbers 300 (LC40–550FG) 40001, 40002, 40004 thru 40079 350 (LC42–550FG) 42001 thru 42009, 42011 thru 42558, 42560 thru 42569, 421001 thru 421013, 421015 thru 421017, 421019 400 (LC41–550FG) 41001 thru 41569, 41571 thru 41800, 411001 thru 411087, 411089 thru 411110, 411112 thru 411138, 411140, 411142, 411147
And the following airplane serial numbers. These airplanes already had the applicable new design rudder hinge and/or brackets installed at the factory prior to delivery of the airplane: Model Serial Numbers 350 (LC42–550FG) 42010, 42559, 421014, 421018, and 421020 400 (LC41–550FG) 41570, 411088, 411111, 411139, 411141, 411143 thru 411146, 411148 thru 411153

DESCRIPTION
This modifi cation kit provides instructions and parts to install the rudder hinges/brackets.

APPROVAL FAA approval has been obtained on technical data in this publication that affects airplane type design.

REFERENCE SB09-27-01R3 WEIGHT AND BALANCE INFORMATION Negligible

O riginal Issue: November 23, 2009 Page 1 of 18 T

o obtain satisfactory results, procedures specifi ed in this publication must be accomplis hed in accordance with accepted methods and p revailing government regulations. Cessna Aircraft Company cannot be responsible for the quality of work performed in accomplishing the requirements of this publication. Cessna Aircraft Company , Customer Service, P.O. Box 7706, Wichita, Kansas 67277, U.S.A. (316) 517-5800, Facsimile (316) 517-7271 www.cessnasupport.com COPYRIGHT © 2009MATERIAL INFORMATION The following kit is required for model 300 and 350 airplanes:

NEW P/N QUANTITY DESCRIPTION OLD P/N DISPOSITION MK400-27-01A1 1 Kit, consisting of the following parts: LA53553309 Rev. C (Alternate 2831350-9) 1 Bracket, Lower, Rudder Various Discard

LA53553301 Rev. F1 (Alternate 2831100-2) 2 Bracket, Rudder (middle and upper location) Various Discard
AN3-5A 2 Bolt, Hex Head 10-32 x 5/8 inch Same Discard
AN3-6A 8 Bolt, Hex Head 10-32 x 3/4 inch Same Discard

MS51496-71 2 Washer, Flat Same Discard NAS1149F0363P 10 Washer (AN960-10) Same Discard NAS1351-3-12 2 Screw, Socket Head 10-32 x 3/4 inch Same Discard

MS24665-151 3 Cotter Pin, 1/16 inch Dia x 1/2 inch Same Discard

1 Instructions The following kit is required for model 400 airplanes:

NEW P/N QUANTITY DESCRIPTION OLD P/N DISPOSITION MK400-27-01-2 1 Kit, consisting of the following parts: LA53553513 Rev. E (Alternate 2831100-5) 1 Hinge, Lower, Rudder Various Discard

LA53553301 Rev. F1 (Alternate 2831100-2) 2 Bracket, Rudder (middle and upper location) Various Discard
AN3-6A 8 Bolt, Hex Head 10-32 x 3/4 inch Same Discard

NAS1149F0363P 8 Washer (AN960-10) Same Discard MS24693C273 4 Screw, Flat Head 10-32 x 5/8 inch Same Discard

MS24665-151 3 Cotter Pin, 1/16 inch Dia x 1/2 inch Same Discard

1 Instructions

MK400-27-01A Page 2 July 20, 2010In addition, the following parts may also be required. Refer to the Accomplishment Instructions.
NEW P/N QUANTITY DESCRIPTION LC53553000-1-G (Alternate 2833101-15) (If/As required) Rudder Stop Bushing, 0.600 inch diameter. (model 400 only) LC53553000-2-G (Alternate 2833101-16) (If/As required) Rudder Stop Bushing, 0.636 inch diameter (model 400 only) LC53553000-3-G (Alternate 2833101-17) (If/As required) Rudder Stop Bushing, 0.671 inch diameter (model 400 only) LC53553000-4-G (Alternate 2833101-18) (If/As required) Rudder Stop Bushing, 0.564 inch diameter (model 400 only) LC53553000-5-G (Alternate 2833101-19) (If/As required) Rudder Stop Bushing, 0.528 inch diameter (model 400 only) 2833102-1 (If/As required) Rudder Stop Bushing, 0.707-inch diameter (model 400 only) 2833102-2 (If/As required) Rudder Stop Bushing, 0.743-inch diameter (model 400 only) AN3-7A (If/As required) Bolt, Hex Head 10-32 x 7/8 inch (all models) AN3-10A (If/As required) Bolt, Hex Head 10-32 x 1 inch (all models) AN4C-15A (If/As required) Bolt, Hex head 1/4-28 x 1-5/8 inch (model 400 only) MS24693C274 (If/As required) Screw, Flat Head 10-32 x 3/4 inch (model 400 only) MS24693C275 (If/As required) Screw, Flat Head 10-32 x 7/8 inch (model 400 only) NAS1351-3-14 (If/As required) Screw, Flat Head 10-32 x 7/8 inch (model 300/350 only) NAS1351-3-16 (If/As required) Screw, Flat Head 10-32 x 1 inch (model 300/350 only) NAS1149F0316P (If/As required) Washer (model 300/350 only) NAS1149F0463P (If/As required) Washer (model 400 only) The material that follows, or equivalent, may be necessary:

NAME NUMBER MANUFACTURER USE Corrosion Resistant Primer K000912 (1.5 gal kit) Cessna Aircraft Company Cessna Parts Distribution 5800 East Pawnee PO Box 1521 Wichita, KS 67218 To touch up the rudder stop on Model 300/350

ACCOMPLISHMENT INSTRUCTIONS 1. Prepare the airplane for maintenance. A. Electrically ground the airplane. B. Make sure that all switches are in the OFF/NORM position.

MK400-27-01A July 20, 2010 Page 3C. Disconnect external electrical power from the airplane. D. Attach maintenance warning tags to the battery and external power receptacle that have "DO NOT CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" written on them. 2. Remove the rudder (Refer to the applicable airplane model Airplane Maintenance Manual (AMM), Chapter 27, Rudder – Removal and Installation). 3. (Figures 1 and 2). Remove and replace the upper and middle rudder brackets p/n LA53553301: A. Remove and discard the four AN3-6A bolts and four NAS1149F0363P washers that attach each of the upper and middle rudder brackets to the fuselage. Discard/keep for fi eld scrap the original upper and middle rudder brackets. B. (Figure 3). Mark the orientation of and keep any shims that are installed under the rudder brackets, as these shims must be reinstalled in the same orientation with the new brackets. C. (Figure 2). Using 80-120 grit sandpaper or a scotchbrite sanding disc, remove the paint and anodized fi nish around the lower holes on one of the new LA53553301 brackets in order to provide a good electrical connection between the bracket and the ground braids on the vertical closeout. NOTE: (Figure 1 and Detail A). The new design bracket has a narrow machined shoulder that the spherical bearing sits on. The side of the bracket with the shoulder should be facing downward, so that downward pressure from the rudder cannot potentially press the bearing out of the bracket. The two sides can be indentifi ed by comparing the amount of steel bearing race that is visible. The downward facing side with the shoulder will have a narrower band of silver colored bearing race visible than the upward facing side. D. Install the two new LA53553301 Rev. F1 rudder brackets with eight new AN3-6A bolts, eight NAS11449F0363P washers, and any shims that were previously installed. Ensure that the bracket that was sanded around the lower fastener holes is placed in the middle rudder bracket position, not the upper. Torque the bolts to 35 in-lbs. NOTE: All hinge and bracket fasteners should provide at least 2 threads minimum protrusion. Visual inspection of thread engagement may be accom plished through the inspection panels on the left side of the vertical stabilizer and the right side of the aft fuselage underneath the right horizontal stabilizer. If inadequate engagement is noted, replace affected fastener using the next higher dash number as necessary. Alternate fastener part numbers are listed in the additional materials section of this Modi fi cation Kit. 4. (Model 300/350 only, Figures 4 and 5) Remove and replace the lower rudder bracket p/n LC53553509: A. Remove and discard the two AN3-5A bolts, two NAS1351-3-12 screws, two MS51496-71 washers, and two NAS1149F0363P washers that attach the lower rudder bracket to the fuselage. Keep the rudder stop that was installed on top of the bracket. B. (Figure 3) Mark the orientation of and keep any shims that are installed under the lower rudder bracket, as these shims must be reinstalled in the same orientation with the new bracket. NOTE: (Figure 4, Detail A). The new design bracket has a narrow machined shoulder that the spherical bearing sits on. The side of the bracket with the shoulder should be facing downward. The two sides can be identifi ed by comparing the amount of steel bearing race that is visible. The downward facing side with the shoulder will have a narrower band of silver colored bearing race visible than the upward facing side. C. (Figure 6). Install a new LA53553309 Rev. C lower rudder bracket with two AN3-5A bolts, two NAS1351-3-12 screws, two MS51496-71 washers, two NAS1149F0363P washers, the original rudder stop, and any shims that were previously installed. Torque the screws and bolts to 35 in-lbs. NOTE: All hinge and bracket fasteners should provide at least 2 threads minimum protrusion. Visual inspection of thread engagement may be accom plished through the inspection panels on the left side of the vertical stabilizer and the right side of the aft fuselage underneath the right horizontal stabilizer. If inadequate engagement is noted, replace affected fastener using the next higher dash number as necessary. Alternate fastener part numbers are listed in the additional materials section of this Modi fi cation Kit.

MK400-27-01A Page 4 July 20, 20105. (Model 400 only, Figures 7 and 8) Remove and replace the lower rudder hinge p/n LC53553513: A. Remove and discard the four MS24693-C273 screws that attach the lower rudder hinge to the fuselage. Discard the original hinge. B. (Figure 3) Mark the orientation of and keep any shims that are installed under the lower rudder hinge, as these shims must be reinstalled in the same orientation with the new hinge. NOTE: (Figure 7, Detail A). The new design hinge has a narrow machined shoulder that the spherical bearing sits on. The side of the hinge with the shoulder should be facing downward. The two sides can be indentifi ed by comparing the amount of steel bearing race that is visible. The downward facing side with the shoulder will have a narrower band of silver colored bearing race visible than the upward facing side. C. Install a new LC53553513 Rev. E lower rudder hinge with four new MS24693-C273 screws and any shims that were previously installed. Torque the screws to 35 in-lbs. NOTE: All hinge and bracket fasteners should provide at least 2 threads minimum protrusion. Visual inspection of thread engagement may be accomplished through the inspection panels on the left side of the vertical stabilizer and the right side of the aft fuselage underneath the right horizontal stabilizer. If inadequate engagement is noted, replace affected fastener using the next higher dash number as necessary. Alternate fastener part numbers are listed in the additional materials section of this Modi fi cation Kit. 6. Reinstall the rudder. (Refer to the applicable airplane model AMM, Chapter 27 , Rudder – Removal and Installation). A. For the lower rudder hinge bolt and rudder cables bolts, tighten the nut snug until all axial play is removed, but do not install the MS24665-151 cotter pin until the rudder travel check is completed. B. Following rudder installation, make sure of correct rudder travel. Use the TC53550000 Defl ection Template with the rigging instructions and speci fi cations in Chapter 27 of the AMM. If the defl ection template is not available, use the alternative method that follows: (1) Locate neutral position of the rudder by aligning the counterweight assembly at the top of the rudder with the vertical stabilizer. NOTE: The rudder counterweight is slightly wider than the vertical stabilizer. N eutral rudder position will not result in the side of the counterweight being fl ush with the surface of the vertical stabilizer, instead, an equal amount of counterweight will project over either side of the vertical stabilizer. (2) (Figure 9) Mark the neutral position of the rudder with a wire pointer as follows: (a) With tape, tightly attach a rigid beam (or equivalent) to the top surface of the horizontal stabilizer so that it angles near the trailing edge of the rudder and does not block the rudder from full defl ection in either direction. (b) With tape, attach a piece of narrow gauge rigid hinge wire (or equivalent) to the end of the beam. (c) Bend the wire to point to the trailing edge of the rudder where it meets the bottom edge of the rudder trim tab. Make sure that the wire pointer is as near as possible to the trailing edge of the rudder and bottom edge of the rudder trim tab without actually touching either surface. NOTE: Failure to precisely mark the rudder neutral position may result in rudder defl ection measurements that are not correct. (3) (Figure 9 and Table 1.) Measure the straight line distance from the wire pointer to the rudder trailing edge where it meets the bottom of the rudder trim tab while holding the rudder against the right, and then left rudder stops. If you use a ruler to measure the distance, make sure that all measurements are referenced from the same side of the ruler. If you use the top side of the ruler for one end and the bottom side for the other, you will get a diagonal measurement instead of the straight line distance. This may result in rudder defl ection measurements that

MK400-27-01A July 20, 2010 Page 5are not correct. The distance in each direction of travel should be in accordance with the chart that follows:
TABLE 1. RUDDER TRAVEL DIMENSIONS

MODEL MINIMUM TRAVEL (L & R) MAXIMUM TRAVEL (L & R) 300 / 350 2.76 inch 3.1 inch 400 8.65 inch 9.24 inch (4) (Model 400 only). If the rudder travel exceeds the maximum travel allowance, remove the rudder and using one new AN4C-15A bolt and one new NAS1149F0463P washer, install a larger diameter stop bushing as applicable (reference TABLE 2) on the rudder horn assembly (see Figure 10) to achieve the correct defl ection. Each successively larger bushing decreases the rudder defl ection by approximately 0.30 inch travel (see Table 2 below for bushing sizes). If the rudder travel is less than the minimum travel allowance, select a smaller diameter stop bushing. TABLE 2. STOP BUSHING PART NUMBERS (MODEL 400 ONLY)

PART NUMBER DIAMETER (INCH) LC53553000-1-G 0.600 LC53553000-2-G 0.636 LC53553000-3-G 0.671 LC53553000-4-G 0.564 LC53553000-5-G 0.528 2833102-1 0.707 2833102-2 0.743 (5) (Model 300/350 only). If the rudder travel exceeds the maximum travel allowance, remove the rudder and shim the rudder stop (Figure 6) with NAS1149F0316P washers placed on the screw(s) between the rudder bracket and rudde r stop as necessary to achieve the correct defl ection. If the rudder travel is less than the minimum travel allowance, grind on the angled face of the stop until the desired angle is achieved. NOTE: If grinding on the rudder stop is required to achieve the required rudder defl ection, apply zinc oxide primer or a similar corrosion protecting treatment to the exposed metal. (6) Remove the beam and wire pointer from the airplane. (7) If removed, reinstall the rudder. (Refer to the applicable Airplane model AMM, Chapter 27, Rudder - Removal and Installation.) C. For the lower rudder hinge bolt and rudder cable bolts, be sure the nut is tightened snug until all axial play is removed, then tighten further until the MS24665-151 cotter pin can be installed. 7. Install all panels and equipment removed for access. 8. Make an entry in the airplane logbook that states installation of this Modi fi cation Kit.

MK400-27-01A Page 6 July 20, 2010Figure 1. LA53553301 Rev. F1 Upper and Middle Rudder Bracket (Sheet 1)

MK400-27-01A July 20, 2010 Page 7Figure 2. LA53553301 Rev. F1 Upper and Middle Rudder Bracket (Sheet 1)

MK400-27-01A Page 8 July 20, 2010Figure 3. LA53553301 Upper and Middle Rudder Bracket Shim (LA53553309 Lower Bracket and LC53553513 Lower Hinge Shim similar) (Sheet 1)

MK400-27-01A July 20, 2010 Page 9Figure 4. LA53553309 Rev. C Model 300/350 Lower Rudder Bracket (Sheet 1)

MK400-27-01A Page 10 July 20, 2010Figure 5. LA53553309 Rev C. Model 300/350 Lower Rudder Bracket (Sheet 1)

MK400-27-01A July 20, 2010 Page 11Figure 6. Lower Rudder Bracket and Hardware (Model 300/350) (Sheet 1)

MK400-27-01A Page 12 July 20, 2010Figure 7. LC53553513 Rev. E Model 400 Lower Rudder Hinge (Sheet 1)

MK400-27-01A July 20, 2010 Page 13Figure 8. LC53553513 Rev. E Model 400 Lower Rudder Hinge (Sheet 1)

MK400-27-01A Page 14 July 20, 2010Figure 9. Rudder Travel Inspection (Sheet 1)

MK400-27-01A July 20, 2010 Page 15Figure 9. Rudder Travel Inspection (Sheet 2)

MK400-27-01A Page 16 July 20, 2010Figure 9. Rudder Travel Inspection (Sheet 3)

MK400-27-01A July 20, 2010 Page 17Figure 10. Lower Rudder Hinge Travel Stop Bushing (400) (Sheet 1)

MK400-27-01A Page 18 July 20, 2010