# Daher Service Bulletin 70-271-21: Revision 1 - Rights: © Socata. Filed by the FAA in regulations.gov docket FAA-2021-0778; AD 2021-24-13 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Daher Service Bulletin 70-271-21](https://openairdocs.org/service-documents/daher/sb-70-271-21.md) - Title as filed: SB70-271-21-R1 - Pages: 7 - PDF: https://openairdocs.org/files/sha256/4d/ca/4dca32873357d45b3ed238b7e707e12911fa48a2a52bdaed564b7cc7d86451c4 - Page: https://openairdocs.org/service-documents/daher/sb-70-271-21/file/4dca32873357 ## Text Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 Page 1 / 7JUL 19 Rev. 1 - NOV 19 This document is the property of DAHER AEROSPACE. Reproduction prohibited without prior DAHER AEROSPACE agreement AIRCRAFT ON WHICH ORIGINAL ISSUE OF THIS SERVICE BULLETIN HAS ALREADY BEEN APPLIED ARE NOT CONCERNED BY THIS REVISION. SUBJECT : ”DUMP” AND ”MICRO” SWITCHES CAUTION PUBLICATION OF THIS SERVICE BULLETIN CANCELS AND REPLACES PREVIOUS REVISIONS. REPLACE YOUR EXISTING COPY OF THIS SERVICE BULLETIN WITH THIS REVISED SERVICE BULLETIN. DESTROY THE SUPERSEDED COPY . NOTE : A black bar in the left margin indicates a change in that line of text or figure . REFERENCE DOCUMENT : Modification No. MOD70-0676-92 Version A and B EFFECTIVITY : TBM aircraft S/N 1106 to 1287 /C0111 TBM700 /C0111 TBM700 G1000 /C0111 TBM850 CFD /C0111 TBM850 AFD /C0084 TBM900 /C0084 TBM910 /C0084 TBM930 /C0084 TBM940 NOTE 1 : For the next aircraft in production line, the above referenced Modification is applied. NOTE 2 : If an aircraft listed in the effectivity has an embodied modification or repair that is not of DAHER AEROSPACE origin, and which affects the content of this Service Bulletin, the operator is responsible for obtaining approval by its airworthiness authority for an adaptation necessary before incorporation of the Service Bulletin. REASON : A. PROBLEM Potential failure of the ”DUMP” and ”MICRO” switches which may lead to a switch ejecting from its slot and loss of the associated function. B. REASON Non conformity of the system's pushbutton switches C. SOLUTION Modify switches to conformity SERVICE BULLETIN TBM AIRCRAFT MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 and is the subject to an AD SB 70-271 REVISION 1 21 ATA No. DAHER AEROSPACE Customer Support Airplane Business Unit TELEPHONE : 33 (0)5 62.41.73.00 65921 TARBES CEDEX 9 tbmcare@daher .com FRANCE ### Page 2 SERVICE BULLETIN TBM AIRCRAFT MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 and is the subject to an AD SB 70-271 REVISION 1 21 ATA No. Page 2 / 7JUL 19 Rev. 1 - NOV 19 PURPOSE OF THE REVISION 1 : To modify Paragraph ”REASON”. NOTE : Application of new presentation / wording. DESCRIPTION : Switches modification to conformity. APPLICATION : During the next scheduled inspection. WARRANTY : Parts and manhours will be covered under warranty regardless of the warranty status of the aircraft. This campaign will end 1 year and 1 month after the SB issuance reference date. OPERATIONAL CONSEQUENCES / TRAINING : Not applicable MAINTENANCE CONSEQUENCES : No changes to the scheduled maintenance. PROCURABLE MATERIAL : - Parts to be ordered from your TBM spare parts distributor. Item Figure Reference Description Qty/aircraft 23 3 4999888222DHR Seal P/N 124125 2 NOTE : Part Numbers given in this Service Bulletin could be amended between the time of approval of the SB and the delivery of the kit without impact on this Service Bulletin approval or for the operators. If the part numbers change, DAHER AEROSPACE will inform operators through an update of the SB. Operators must contact their TBM spare parts distributor for any question. CONSUMABLE MATERIAL or OTHER PRODUCTS (Local purchase) : - MAGNALUBE-G grease PTFE POLYUREA TOOLS : - Standard aeronautical maintenance station tools AFFECTED PUBLICATIONS : (Documents updated in relation to this SB distribution) IPC : 21-00-01 and 23-12-04 AMM : Not impacted CMM : Not impacted POH : Not impacted RELATED DOCUMENTS : (Documents necessary to apply procedure described hereafter) None ### Page 3 SERVICE BULLETIN TBM AIRCRAFT MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 and is the subject to an AD SB 70-271 REVISION 1 21 ATA No. Page 3 / 7JUL 19 Rev. 1 - NOV 19 This document is the property of DAHER AEROSPACE. Reproduction prohibited without prior DAHER AEROSPACE agreement ASSOCIATED DOCUMENT : None MANPOWER : - 1 aeronautical electrician : 1 hour NOTE : The manpower estimates given in this Service Bulletin assume that the work will be done by experienced personnel and may need to be revised upwards to suit operator’s circumstances. The estimates do not include the time to prepare, plan or inspect the work. Manufacture and procurement of parts and tools, drying times for paints, sealants, etc., and general administration work are not included either. TECHNICAL INCIDENCES : - Negligible PARTS TO BE RE-IDENTIFIED : YES /C0111 NO /C0084 DESCRIPTION OF ACCOMPLISHMENT INSTRUCTIONS : See Figures 1, 2 and 3 WARNING MAKE SURE THAT YOU OBEY ALL THE WARNINGS AND CAUTIONS INCLUDED IN THE REFERENCED PROCEDURES. CAUTION ALWAYS OBEY THE PRECAUTIONS THAT FOLLOW TO KEEP ELECTRICAL WIRING IN A SATISFACTORY CONDITION (ELECTRICALLY AND MECHANICALLY SERVICEABLE) ; WHEN YOU DO MAINTENANCE WORK, REPAIRS OR MODIFICATIONS, ALWAYS KEEP ELECTRICAL WIRING, COMPONENTS AND THE WORK AREA AS CLEAN AS POSSIBLE. USE ALL APPROPRIATE MEANS TO DECREASE THE RISK OF CONTAMINATION AND DAMAGE TO THE ELECTRICAL WIRING INSTALLATION. NOTE : Operations required in this Service Bulletin must be accomplished by persons authorized by their Airworthiness Authorities and according to the procedure described hereafter. 1) Make sure the ”SOURCE” selector is set to ”OFF” and the crash lever is down. CAUTION MAKE A PARTICULAR ATTENTION TO NOT DAMAGE THE TWO INDICATOR LIGHT UNITS. 2) By hand or with a small tool, remove carefully the two indicator light units (21). CAUTION FOR SEAL INSTALLATION, DO NOT USE CUTTING TOOL. 3) According to Figure 3, install the seal (23) on each indicator light unit (21). 4) In order to facilitate indicator light units (21) installation, apply a thin layer of MAGNALUBE-G grease around the inside of the housings - See area to be greased (24), Figure 3. ### Page 4 SERVICE BULLETIN TBM AIRCRAFT MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 and is the subject to an AD SB 70-271 REVISION 1 21 ATA No. Page 4 / 7JUL 19 Rev. 1 - NOV 19 5) By hand and without tool, install carefully the indicator light units (21). UPDATING OF THE AIRCRAFT DOCUMENTATION : Upon completion of Service Bulletin No. SB 70-271-21 Revision 1 ””DUMP” AND ”MICRO” SWITCHES” (Reference MOD70-0676-92 Version A and B), make an appropriate maintenance record entry. WARNING : DAHER AEROSPACE considers that it is MANDATORY for operators to comply with the instructions of this SB. Operators who arbitrarily ignore the compliance statement indicated in this SB do so at their own risk. ### Page 5 (OCR) TBM AIRCRAFT SERVICE BULLETIN SB 70-271 REVISION 1 21 ATA No. MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 and is the subject to an AD 1 - "DUMP" switch 2 - PL23 panel 3 - PL11 panel G1000 AIRCRAFT 3 G3000 AIRCRAFT PL23 PANEL PL11 PANEL PRESSURIZATION DUMP BLEED ECS AUTO DUMP NORM A/C BLEED PRES MODE OFF AUTO AUTO AUTO MANUAL OFF OFFIRST FAN SPEED TEMP /°C HOT AIR FLOW HOT AIR FLOW C4210001AAAAMA4600 Figure 1 - "DUMP" switch location JUL 19 Page 5 / 7 Rev. 1 - NOV 19 This document is the property of DAHER AEROSPACE. Reproduction prohibited without prior DAHER AEROSPACE agreement ### Page 6 SERVICE BULLETIN TBM AIRCRAFT MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 and is the subject to an AD SB 70-271 REVISION 1 21 ATA No. Page 6 / 7JUL 19 Rev. 1 - NOV 19 Figure 2 - ”MICRO” switch location 11 - PL12 panel 12 - ”MICRO” switch ### Page 7 SERVICE BULLETIN TBM AIRCRAFT MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 and is the subject to an AD SB 70-271 REVISION 1 21 ATA No. Page 7 / 7JUL 19 Rev. 1 - NOV 19 This document is the property of DAHER AEROSPACE. Reproduction prohibited without prior DAHER AEROSPACE agreement Figure 3 - ”DUMP” and ”MICRO” switches modification 21 - Indicator light unit 22 - Cover 23 - Seal 24 - Area to be greased --- 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.