Single Engine Service Bulletin July 22, 2011 TITLE AVIONICS SWITCH INSPECTION AND REPLACEMENT EFFECTIVITY The following airplanes equipped with the Garmin G1000 Avionics system: Model Serial Numbers 172R 172S 182T T182T 206H T206H 17281241 and On 172S9810 and On 18281228 and On T18208232 and On 20608215 and On T20608450 and On REASON On airplanes equipped with the Garmin G1000 Avionics system, the AVIONICS switch may not operate correctly when it is used beyond its serviceable life limit. Cessna has decided to limit the life of this switch to 500 hours of operation. DESCRIPTION An inspection of the airplane paperwork is accomplished to determine the length of time the installed AVIONICS switch has been in service. Switches that have been in service for 500 hours of operation or more shall be replaced. Page 1 of 6 To obtain satisfactory results, procedures specified in this publication must be accomplished in accordance with accepted methods and prevailing 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 2011
COMPLIANCE Recommended: A one time inspection of the maintenance records of the airplane to determine the time in service of the AVIONICS switch shall be accomplished at the next 100-hour / 12-month (annual-type) inspection. The part number S3443-1-1 AVIONICS switch shall be replaced every 500 hours of operation. Subsequent actions: This Service Bulletin and 500-hour component life limit shall remain in effect until superseded by revision of the Component Time Limits Section of the airplane Maintenance Manual (latest revision). APPROVAL FAA approval has been obtained on technical data in this publication that affects airplane type design. MANPOWER If necessary, 1.2 man-hours to replace the AVIONICS switch REFERENCES Model 172 Series 1996 and On Maintenance Manual Model 182/T182 Series 1997 and On Maintenance Manual Model 206/T206 Series 1998 and On Maintenance Manual Model 172R/172S Wiring Diagram Manual Model 182S/182T/T182T Wiring Diagram Manual Model 206H/T206H Wiring Diagram Manual NOTE: Make sure all publications used are complete and current. Refer to www.cessnasupport.com. NOTE: This information shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance Manual or Instructions for Continued Airworthiness and must be accomplished for ongoing airworthiness compliance as necessary in accordance with 14 CFR Part 43.13. OTHER PUBLICATIONS AFFECTED Model 172R & Model 172S Illustrated Parts Catalog Model 182S/182T/T182T Illustrated Parts Catalog Model 206H & Model T206H Illustrated Parts Catalog NOTE: Make sure all publications used are complete and current. Refer to cessnasupport.com. MATERIAL AVAILABILITY The following parts are available from Cessna Service Parts and Programs through an appropriate Cessna Authorized Service Facility. Part Number Description Qty/Airplane S3443-1-1 Switch, Split Dual Rocker 1 Page 2 July 22, 2011
ACCOMPLISHMENT INSTRUCTIONS WEIGHT AND BALANCE INFORMATION Negligible Material Information The part below may be necessary: NEW P/N QUANTITY DESCRIPTION OLD P/N DISPOSITION S3443-1-1 1 Switch, Split Dual Same Discard Rocker Instructions 1. Look in the airplane paperwork to see if the AVIONICS switch was installed within the last 500 hours of operation of the airplane. A. If the switch was installed within the last 500 hours of operation of the airplane, go to Step 2. B. If the total time in service for the switch is 500 hours of operation or more, do as follows: (1) Prepare the airplane for maintenance. (a) Make sure that all switches are in the OFF/NORM position. (b) Disconnect electrical power from the airplane. 1 Electrically ground the airplane. 2 Disconnect external electrical power. 3 Disconnect the airplane battery. (2) Attach maintenance warning tags to the battery and external power receptacle that have "DO NOT CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" written on them. (3) Remove the AVIONICS switch from the airplane as follows: (Refer to the applicable Airplane Model Maintenance Manual, Chapter 31, Instrument and Control Panels - Maintenance Practices.) (a) Make sure that the MASTER and AVIONICS switches are in the off position. (b) Remove and keep the screws that attach the switch panel to the instrument panel. (c) Carefully pull out the switch panel as necessary to get access behind the switch panel. (d) As applicable, record the location of the wires attached to the AVIONICS switch. (e) Remove all four switch terminal screws to disconnect the AVIONICS switch from the switch wires. (f) Remove the mounting bezel from the switch. (g) Remove the AVIONICS switch from the switch panel. (4) Discard the AVIONICS switch. (5) Install a new S3443-1-1 AVIONICS switch as follows: (a) Attach the AVIONICS switch to the kept switch mounting bezel. (b) Use the recorded wire locations to correctly connect all four wires to the switch with the terminal screws supplied with the new S3443-1-1 AVIONICS switch. (c) Torque the switch terminal screws to 10 inch-pounds, +2 or 2 inch-pounds. (d) Carefully install the S3443-1-1 AVIONICS switch and the switch mounting bezel into the switch panel. July 22, 2011 Page 3
(e) (f) (g) (h) Puttheswitchpanelinpositionontheinstrumentpanel. Install the kept screws that attach the switch panel to the instrument panel. Remove maintenance warning tags from battery and external power receptacle and connect the battery. Do an operational test of the AVIONICS switch. 2. Make an entry in the airplane logbook that states compliance and method of compliance with this Service Bulletin. NOTE: This information shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance Manual or Instructions for Continued Airworthiness and must be accomplished for ongoing Airworthiness Compliance as necessary in accordance with 14 CFR Part 43.13. Page 4 July 22, 2011
Figure 1. Electrical Switch Inspection and Replacement (Sheet 1) July 22, 2011 Page 5
OWNER NOTIFICATION On August 12, 2011 the following message will be sent to applicable owners of record in A. Dear Cessna Single-Engine Piston Owner: This Owner Advisory is to inform you that has been issued. On airplanes equipped with the Garmin G1000 Avionics system, the AVIONICS switch may not operate correctly when it is used beyond its serviceable life limit. Cessna has decided to limit the life of this switch to 500 hours of operation. An inspection of the airplane paperwork is accomplished to determine the length of time the installed AVIONICS switch has been in service. Switches that have been in service for 500 hours of operation or more shall be replaced. Recommended: Aonetimeinspection of the maintenance records of the airplane to determine the time in service of the AVIONICS switch shall be accomplished at the next 100-hour / 12-month (annual-type) inspection. The part number S3443-1-1 AVIONICS switch shall be replaced every 500 hours of operation. Subsequent actions: This Service Bulletin and 500-hour component life limit shall remain in effect until superseded by revision of the Component Time Limits Section of the airplane Maintenance Manual (latest revision). The information contained in the referenced Cessna Service Bulletin must be considered an amendment to the Cessna Manufacturer's Service/Maintenance Manual or Instructions for Continued Airworthiness, and must be accomplished for ongoing Airworthiness Compliance as required per 14 CFR Part 43.13. Please contact a Cessna Single Engine Authorized Service Facility for detailed information and arrange to have Cessna Service Bulletin accomplished on your airplane. * * * * * * * Page 6 July 22, 2011