# Reims Aviation Service Bulletin F406-62: No revision named - Rights: © Textron Aviation Inc. Filed by the FAA in regulations.gov docket FAA-2021-0714, the docket of AD 2021-22-21. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Reims Aviation Service Bulletin F406-62](https://openairdocs.org/service-documents/cessna/f406-62.md) - Title as filed: SB F406-62 Rev 01 - Pages: 3 - PDF: https://openairdocs.org/files/sha256/2a/07/2a07fdb909d484f9a0dbd0561d500bbe3a4f1b728252281d16c50f13e756e050 - Page: https://openairdocs.org/service-documents/cessna/f406-62/file/2a07fdb909d4 ## Text Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 ASI AVIATION 51360 PRUNAY - FRANCE Bulletin Service N°F406-62 REV 01 December 14th 2018 Page 1/3 SERVICE BULLETIN N° F406-62 Rev 01 MANUFACTURER REFERENCE: N°F406-62 Rev 01 N° ATA: 24 Date: December 14th 2018 TITLE: AVIONICS BUS CIRCUIT BREAKER SWITCH REPLACEMENT EFFECTIVITY Model Serial number F406 F406-0001 & ON PURPOSE It has been determined that avionics bus circuit breaker switches reference CM3589- 50 with a date code earlier than 0434 require a life limit of 1000 airplane hours. CM3589- 50 circuit breaker switches without a date code must be imperatively replaced with the new circuit breaker switches reference 4061- 2400-1 as described in this Service Bulletin , within the next 200 hours of operation, or 12 months or the next programmed inspection , whichever occurs first. Non-compliance with this Service Bulletin may allow an avionics bus circuit breaker switch to fail in a manner that could result in noticeable smoke and a burning smell in the cockpit. Scope of revision 1 : A limit of 6 years is added for this new circuit breaker switch. The standard aircraft maintenance manual chapter 05-11- 00 has been updated. COMPLIANCE: MANDATORY Shall be accomplished in the 200 hours of operation, or 12 months or the next programmed inspection. Circuit breaker switches CM3589-50 and 4061- 2400-1 must be replaced every 6 years by circuit breaker switches 4061-2400-1. APPROVAL The technical content of this SB has been approved under DOA EASA 21J.064 It is expected this Service Bulletin will be the subject of an EASA Airworthiness Directive. ### Page 2 ASI AVIATION 51360 PRUNAY - FRANCE Bulletin Service N°F406-62 REV 01 December 14th 2018 Page 2/3 MAN-HOURS Approximately 7 man-hours MATERIAL The part below is available from: ASI AVIATION Aérodrome de Reims Prunay 51360 Prunay Tel: 03.26.48.46.65 PART NUMBER DESCRIPTION QTY / AIRCRAFT 4061-2400-1 CIRCUIT BREAKER SWITCH 2 CREDIT Not applicable ACCOMPLISHMENT INSTRUCTIONS 1. Electrically ground the airpl ane and turn all switches to the “OFF” position. If external power is connected to the airplane, disconnect external power from receptacle. 2. Disconnect the Airplane battery. ( Refer to the applicable sections of the F406 Maintenance manual) 3. Attach mainten ance warning tags to the battery and external power receptacle with the following instruction “ DO NOT CONN ECT ELECTRICAL POWER -MAINTENANCE IN PROGRESS” 4. Remove the pilot’s seat for access to remove the left circuit breaker console panel. ( Refer to the applicable sections of the F406 Maintenance manual) 5. Remove the pilot’s circuit breaker console side panel to get access to the avionics bus switches P/N CM3589-50. ( Refer to the applicable sections of the F406 Maintenance manual) 6. Remove the pilot’s circuit breaker console as needed to gain access to the back side of the avionics bus switches P/N CM3589-50. 7. Remove the avionics bus switches P/N CM3589 -50. (Refer to the applicable sections of the F406 Maintenance manual) 8. Do an inspection of the avionics bus switches P/N CM3589-50 to make sure there is a date code stamped on them. ### Page 3 ASI AVIATION 51360 PRUNAY - FRANCE Bulletin Service N°F406-62 REV 01 December 14th 2018 Page 3/3 NOTE : The date code will have four digits. The first two digits represent the year that the switch was made, the last two digits represent the week of the same year. Date code localisation A. If a switch P/N CM3589-50 does not have a date code, the switch must be replaced with a new 4061-2400-1 switch. B. If a switch P/N CM3589-50 is installed with a date code, record the date. C. Switches P/N CM3589-50 with a date code earlier than 0434 have a time limit of 1000 hours and must be replaced within 1000-hour time limit with a new 4061-2400-1 switch. D. Switches P/N CM3589 -50 with a date code of 0434 or later are not affected by the 1000-hour time limit and can be installed again. 9. Install a new 4061-2400-1switches or the original avionics bus switches as applicable. (Refer to the applicable sections of the F406 Maintenance manual) 10. Install the pilot’s circuit breaker console. (Refer to the applicable sections of the F406 Maintenance manual) 11. Install the pilot’s circuit breaker console side panel. (Refer to the applicable sections of the F406 Maintenance manual) 12. Install the pilot’s seat. (Refer to the applicable sections of the F406 Maintenance manual) 13. Remove maintenance warning tags from battery and external power receptacle. 14. Reconnect the airplane battery and verify correct operation of any new switch(es) installed. 15. Make an entry in the airplane logbook stating compliance and method of compliance with this Service Bulletin and if applicable, when replacement of any avionics bus switch is due. OWNER NOTIFICATION The Service Bulletin F406-62 Rev 01 dated on December 14th, 2018 will be addressed to the owners of the F406 airplanes. It is recommended to the customers must contact ASI AVIATION for any further information relating to the application of the Service Bulletin F406-62 Rev 01 on their airplane. ASI AVIATION Aérodrome de Reims Prunay 51360 Prunay Tel: 03.26.48.46.65 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.