# Embraer Service Bulletin 145-78-0035 Copy: Revision 03 ("SB145-78-0035 R3"), 18 pages: PDF https://openairdocs.org/files/sha256/92/5f/925f5cb6779e7724f16b12cd80f0c548e16f997e58f16ae3bbdb950f7655616c; text https://openairdocs.org/service-documents/embraer/sb-145-78-0035/file/925f5cb6779e.md. Rights: © Embraer S.A. Filed by the FAA in regulations.gov docket FAA-2019-0118; AD 2019-03-30 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. ## Details - Manufacturer: [Embraer](https://openairdocs.org/service-documents/embraer.md) - Type: Service bulletin (Service Bulletin) - Number: 145-78-0035 - Latest revision known: 145-78-0035, Revision 03, dated November 26, 2004 (OpenAirDocs) - Page: https://openairdocs.org/service-documents/embraer/sb-145-78-0035 ## ADs that cite it (2) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2019-03-30](https://openairdocs.org/ad/2019-03-30.md), effective Mar 26, 2019: Revisions 01, 02 and 03 - [AD 2004-13-16](https://openairdocs.org/ad/2004-13-16.md), effective Aug 3, 2004: Revisions 01 and 02 Also cited in [1 proposed AD](https://openairdocs.org/service-documents/embraer/sb-145-78-0035/proposed.md). ## Text (18 pages) Rights: © Embraer S.A. Filed by the FAA in regulations.gov docket FAA-2019-0118; AD 2019-03-30 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. 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 . S.B. No.: 145-78-0035 PAGE: 1 of 2 1. DESCRIPTION This sheet transmits Revision 03 to Service Bulletin 145-78-0035. NOTE: This is a partial reissue of the Bulletin. 2. ADDITIONAL ACTION Aircraft that have complied with the previous issue of this bulletin do not need any additional action. 3. RECORD OF REVISION Basic issue: 04/Oct/2002. Revision 01: 11/Dec/2002. Revision 02: 31/Jan/2003. Revision 03: 26/Nov/2004. 4. HIGHLIGHTS SUBJECT/PAGE DESCRIPT ION OF REVISION A. EFFECTIVITY / 01 Changed effectivity. B. REASON / 02 Added reason for Revision 03. D. APPROVAL / 3 Certification authority identification upgrade. ### Page 2 . S.B. No.: 145-78-0035 PAGE: 2 5. LIST OF EFFECTIVE PAGES Page Date Rev. Page Date Rev. 01 26/Nov/2004 03 08 04/Oct/2002 00 02 26/Nov/2004 03 09 04/Oct/2002 00 03 26/Nov/2004 03 10 04/Oct/2002 00 04 04/Oct/2002 00 11 04/Oct/2002 00 05 04/Oct/2002 00 12 04/Oct/2002 00 06 04/Oct/2002 00 13 04/Oct/2002 00 07 04/Oct/2002 00 ### Page 3 DATE: 04/Oct/2002 S.B. No.: 145-78-0035 REVISION No.: 03 – 26/Nov/2004 PAGE: 1 of 13 EXHAUST – REPLACEMENT OF THRUST REVERSER TRANSIT SWITCHES 1. PLANNING INFORMATION A. EFFECTIVITY Aircraft affected: MODEL SN EMB-145( ) and EMB-135( ) 145002 thru 145189, 145191 thru 145362, 145364 thru 145411, 145413 thru 145446, 145448 thru 145450, 145452 thru 145461, 145463 thru 145483, 145485 thru 145494, 154496 thru 145504, 145506 thru 145508, 145510 thru 145515, 145517 thru 145523, 145525 thru 145527, 145529 thru 145539, 145541 thru 145548, 145550, 145552 thru 145554, 145556 thru 145585, 145587 thru 145589, 145592 thru 145596, 145598, 145601 thru 145606, 145608 thru 145619, 145621 thru 145624, 145626 thru 145636, 145638, and 145639 equipped with the affected components. Affected components: Thrust Reversers PN 145-77751-( ) SN 001 thru 1099 installed on the aircraft or in stock. In-production effectivity: EMB-145( ) and EMB-135( ) aircraft SN 145190, 145447, 145451, 145509, 145524, 145551, 145586, 145599, 145600, 145620, 145625, 145637, 145640 and on, equipped with thrust reversers S/N 1100 and on, have an equivalent modification factory-incorporated. ### Page 4 S.B. No.: 145-78-0035 DATE: 04/Oct/2002 PAGE: 2 REVISION No.: 03 – 26/Nov/2004 B. REASON (1) Applicable to “PART I” There has been reported cases of internal corrosion being developed on the cell of a small number of transit switches, causing the error message "ENG( ) REV DISAGREE" to be displayed on the EICAS. One case of severely contaminated transit switch resulted in uncommanded engine rollback to idle in flight with "ENG ( ) REV FAIL" message being displayed on the EICAS. To enhance the system reliability, a new transit switch is being introduced. (2) Applicable to “PART II”. To prevent the installation of incorrect switches (old P/N’s) at transit position, baulking brackets are being implemented. REVISION 01: Changed aircraft effectivity. REVISION 02: Changed aircraft effectivity. REVISION 03: To change Service Bulletin effectivity and to upgrade certification authority identification. C. DESCRIPTION – TIME FOR ACCOMPLISHMENT (1) “PART I” - Switch Substitution. (a) DESCRIPTION This modification involves the substitution of the thrust reverser transit switches. To do that, it is necessary to gain access to the work area at the engine thrust reversers. (b) TIME FOR ACCOMPLISHMENT Embraer recommends that this bulletin be accomplished in the next 4000 flight cycles or 3 calendar years, whichever occurs first. ### Page 5 DATE: 04/Oct/2002 S.B. No.: 145-78-0035 REVISION No.: 03 – 26/Nov/2004 PAGE: 3 (2) “PART II” – Baulking Bracket Installation. (a) DESCRIPTION This modification involves the installation of the transit switch baulking brackets. To do that, it is necessary to gain access to the work area at the engine thrust reversers. (b) TIME FOR ACCOMPLISHMENT Embraer recommends that this bulletin be accomplished in the next 4000 flight cycles or 3 calendar years, whichever occurs first. D. APPROVAL The technical aspects of this Service Bulletin are approved by: CTA/IFI – Divisão de Certificação de Aviação Civil. E. ESTIMATED MANPOWER (1) “PART I” - Switch Substitution. - Disassembly: not applicable. - Replacement: 2.0 man-hours. - Assemblage: not applicable. - Test: 4.0 man-hours. NOTE: This estimation is based on the time required per nacelle. (2) “PART II” - Baulking Bracket Installation. - Disassembly: 0.5 man-hours. - Replacement: not applicable. - Assemblage: 1.0 man-hour. - Test: not applicable. ### Page 6 S.B. No.: 145-78-0035 DATE: 04/Oct/2002 PAGE: 4 REVISION No.: NOTES: This estimate is based on the time required per nacelle. This estimated time required does not include the sealant curing time. F. TOOLING – COST AND AVAILABILITY Not applicable. G. WEIGHT AND BALANCE (1) “PART I” - Switch Substitution. - Change in basic weight: Not applicable. - Change in basic moment: Not applicable. (2) “PART II” – Baulking Bracket Installation. - Change in basic weight: Negligible change. - Change in basic moment: Negligible change. H. REFERENCES A.M.M. 145/( ) – “Aircraft Maintenance Manual” – Chapter 06-43-00 – Dimensions & Areas. A.M.M. 145/( ) – “Aircraft Maintenance Manual” – Chapters 78-31-01 and 78-34-01 - Exhaust. C.P.M. 145/( ) – “Corrosion Prevention Manual” – Part 1 – Chapter 51 I. AFFECTED PUBLICATIONS I.P.C. 145/( ) – "Illustrated Parts Catalog" - Chapter 78-32-02 - Exhaust. A.M.M. 145/( ) – “Aircraft Maintenance Manual” – Chapter 78-34-01 - Exhaust. ### Page 7 DATE: 04/Oct/2002 S.B. No.: 145-78-0035 REVISION No.: PAGE: 5 2. MATERIAL – COST AND AVAILABILITY The material required for the accomplishment of this bulletin should be procured as follows: (a) Applicable to “PART I” - Switch Substitution. Switches (2 units) P/N 83-990-168 required for the accomplishment of “PART I” of this bulletin will be available from Messier Services (see Note 4). NOTE: Materials for one nacelle. NEW PN DESCRIPTION OLD PN QTY SUP QTY USED DISP 83-990-168 Transit Switch 83-990-137 83-990-152 83-990-166 02 02 3 (b) Applicable to “PART II” – Baulking Bracket Installation. The material required for the accomplishment of “PART II” of this bulletin will be available from Messier Services (see Note 4) 08 weeks after receipt of orders, at the reference price of US$ 193.20, subject to confirmation upon receipt of orders. When ordering, s pecify S.B. 145-78-0035, KIT PN BS145-78-0 035/0000, which comprises one kit PN 145-79563-601. NOTE: The KIT provides materials for one nacelle. PN 145-79563-601 NEW PN DESCRIPTION OLD PN QTY SUP QTY USED DISP 145-77997-601 Baulking Bracket 02 02 2 CR3213-4-2 or M7885/2-4-02 Rivet CR3213-4-1 06 04 3 PR1750A or PL32M Sealant A.R. A.R. 6 ### Page 8 S.B. No.: 145-78-0035 DATE: 04/Oct/2002 PAGE: 6 REVISION No.: DISPOSITION: 2 = Incorporate part bearing NEW PN. 3 = Replace part bearing OLD PN with part bearing NEW PN. 6 = Apply as required. QUANTITY: A.R. = As Required. NOTES: 1) When applicable, the use of alternative or similar parts in place of the ones specified in the kit is allowable, provided that these alternative or similar parts are approved by Embraer. Refer to IPC Optional PN Cross-Reference List. 2) The expendable or consumable parts presented in the tasks referred to in this bulletin, which are necessary for its accomplishment, should be procured from the operator's inventories or ordered as spares. 3) Sealant PN PR1750A, PL32M, or equivalent, required for the accomplishment of this bulletin, should be procured from the operator’s inventories or from a local supplier. 4) MESSIER SERVICES: For U.K., Holland, Belgium, Switzerland, Luxembourg, Portugal, and Scandinavia: Messier Services - Gloucester Office – Cheltenham Road – Gloucester GL2 9QH – England. SITATEX: GLOCL7X FAX: 44(0)1452 711768 TEL: 44(0)1452 712424 VENDOR CODE: K0797 SPEC 2000 SITA ACCESS CODE: GLODB7X AOG TEL: 44(0)2083 217474 For France, Germany, Italy, Eastern Block, South Africa, and Guinea: Messier Services - Velizy Office – Zone Aéronautique Louis Bréguet – BP10 – 78142 Vélizy Sedex - France. SITATEX: QBHMDCR FAX: 33 (0) 14629 1818 TEL: 33 (0) 14629 8704 VENDOR CODE: FA5F7 SPEC 2000 SITA ACCESS CODE: GLODB7X AOG TEL: 33 (0) 15521 2590 ### Page 9 DATE: 04/Oct/2002 S.B. No.: 145-78-0035 REVISION No.: PAGE: 7 For Asia/Pacific rim including Australia: Messier Services Pte Ltd – 21 Loyang Crescent – Singapore - 508985 SITATEX: SINDB7X FAX: 65 6 542 2718 TEL: 65 6 543 0626 VENDOR CODE: S0176 SPEC 2000 SITA ACCESS CODE: GLODB7X AOG TEL: 65 6 245 5688 For Americas: Messier Services Inc – PO Box 49 – Sterling – Virginia –20167- USA. FAX: 1 703 404 1621 TELEX: 824459 TEL: 1 703 450 8200 VENDOR CODE: OU502 SPEC 2000 SITA ACCESS CODE: GLODB7X AOG TEL: 1 404 305 2626 ### Page 10 S.B. No.: 145-78-0035 DATE: 04/Oct/2002 PAGE: 8 REVISION No.: 3. ACCOMPLISHMENT INSTRUCTIONS The steps below outline the general accomplishment instructions. The detailed sequence is given as notes in the figures. WARNING: ATTENTION SHOULD BE PAID TO ALL GROUND SAFETY PRECAUTIONS MENTIONED IN THE APPLICABLE A.M.M. CHAPTER 78-30-00 WHEN WORKING IN THE THRUST REVERSER AREA. A. Make sure that the aircra ft is safe for maintenance. B. Open and lock the left engine thrust reverser doors in the deployed position according to “Aircraft Maintenance Manual” – Chapter 78-31-01 (TASK 78-31-01- 980-802-A) - Exhaust. “PART I” C. Check and, if necessary, replace the transit switches according to Figure 1. “PART II” D. Install the transit switch baulking brackets according to Figure 2. E. Repeat steps “B” to “D” on the right engine. F. Restore the aircraft to normal. G. Enter the accomplishment of this bulletin in the applicable documents. ### Page 11 DATE: 04/Oct/2002 S.B. No.: 145-78-0035 REVISION No.: PAGE: 9 1. Locate the upper and lower transit switches (see details “B” and “C”) and check their P/N. CAUTION: IN THE CASE OF TRANSIT SWITCH REPLACEMENT, THE THRUST REVERSER FUNCTIONAL TEST (A.M.M . TASK 78-34-01-700-801-A), AND THE OPERATIONAL TEST (A.M.M. TASK 78-31-01-700-801-A) MUST BE DONE AFTER THE SUBSTITUTION. 2. If transit switches P/N 83-990-137, 83-990- 152, or 83-990-166 are found, replace the transit switch with a new one with P/N 83-990-168 according to “Aircraft Maintenance Manual” – Chapter 78-34-01 - Exhaust. FIGURE 1: LOCATION/SUBSTITUTION OF TRANSIT SWITCHES (SHEET 01 OF 02) ### Page 12 (OCR) EMBRAER EMPRESA BRASILEIRA DE AERONÁUTICA S/A - S.JOSÉ DOS CAMPOS - SP SERVICE BULLETIN UPPER THRUST REVERSER ZONE DOOR 426 ZONE 416 DET. A C • LOWER THRUST REVERSER DOOR UPPER TRANSIT SWITCH DET. B LOWER TRANSIT SWITCH DET. C 145SB780199.MCE А FIGURE 1: LOCATION/SUBSTITUTION OF TRANSIT SWITCHES (SHEET 02 OF 02) S.B. No.: 145-78-0035 DATE: 04/Oct/2002 PAGE: 10 REVISION No.: ### Page 13 DATE: 04/Oct/2002 S.B. No.: 145-78-0035 REVISION No.: PAGE: 11 WARNING: SEALANTS ARE CLASSIFIED AS HAZARDOUS MATERIALS WHICH MAY CAUSE INJURY OR ILLNESS IF NOT PROPERLY USED. THESE PRODUCTS SHOULD BE USED ONLY IN ACCORDANCE WITH THE MANUFACTURER'S SPECIFIC SAFETY AND HEALTH RECOMMENDATIONS. PRIOR TO THE USE OF THESE PRODUCTS, CAREFULLY READ THE APPLICABLE "MATERIAL SAFETY DATA SHEET" AND FOLLOW ALL LISTED SAFETY AND HEALTH PRECAUTIONS. 1. Remove access panels 416BB and 416HT or 426BB and 426HT, as applicable, to get access to the transit switches. Refer to “Aircraft Maintenance Manual” – Chapter 06-43- 00 – Dimensions & Areas. 2. Locate the upper transit switch. 3. Identify the two rivets to be removed according to view “A”. CAUTION: BE CAREFUL TO AVOID DAMAGE TO THE SWITCH ARM DURING THE DRILLING OPERATION AND BRACKET INSTALLATION. 4. Carefully drill out the two rivets taking care not to increase the diameter of rivet holes. If you find it necessary to increase the diameter of the rivet holes, you must not increase the diameter of the holes by more than one oversize. 5. Position the baulking bracket as shown in view “A” allowing a gap of approximately 1mm (0.04 in.) between the edge of the baulking bracket and the transit switch. If necessary, remove unwanted material from the edge of the baulking bracket. 6. Get access to the area below the transit switch between the two bulkheads and, with the aid of a 90° scriber or backmark pins, mark the baulking bracket using the holes of the removed rivets as a template. 7. Make sure there is a minimum distance of 1.5 x D1 between the rivets and the edge of the baulking brackets (see detail “B”). 8. Using the two marks as a guide, carefully drill two 3.3 mm (0.13 in.) holes in the baulking bracket. Deburr the holes. 9. Protect and paint the reworked area. Refer to the “Corrosion Prevention Manual” – Part 1 – Chapter 51. 10. Carefully apply a thin layer of sealant PL32M or PR1750A to the mating surfaces of the baulking bracket and the thrust reverser bulkhead. FIGURE 2: INSTALATION OF BAULKING BRACKETS (SHEET 01 OF 03) ### Page 14 S.B. No.: 145-78-0035 DATE: 04/Oct/2002 PAGE: 12 REVISION No.: 11. Install the baulking bracket to the thrust reverser bulkhead with the two new rivets (P/N CR3213-4-2). 12. Remove the unwanted sealant from the baulking bracket and the thrust reverser bulkhead using a dry lint-free cloth. 13. Clean the area between the two bulkheads by removing all debris. 14. Repeat steps “2” thru “13” for the lower door transit switch. 15. Close access panels 416BB and 416HT or 426BB and 426HT as applicable. Refer to “Aircraft Maintenance Manual” – Chapter 06-43-00 – Dimensions & Areas. 16. Unlock and close the thrust reverser doors according to “Aircraft Maintenance Manual” – Chapter 78-31-01 (TASK 78-31-01-980-004-A00) - Exhaust. FIGURE 2: INSTALATION OF BAULKING BRACKETS (SHEET 02 OF 03) ### Page 15 (OCR) EMBRAER EMPRESA BRASILEIRA DE AERONÁUTICA S/A - S.JOSÉ DOS CAMPOS - SP SERVICE BULLETIN UPPER TRANSIT SWITCH POSITION (REF.) ACCESS ACCESS PANEL PANEL (REF.) (REF.) 3 1) (12 BAULKING BRACKET LOWER TRANSIT P/N 145-77997-601 SWITCH POSITION (REF.) (INSTALL) B 13 REAR FIREWALL (REF.) TRANSIT SWITCH 1 mm (0.04 in.) RIVET P/N CR3213-4-1 2 POSITIONS (REMOVE) RIVET VIEW A P/N CR 3213-4-2 2 POSITIONS (TYPICAL) (INSTALL) 1.5 x D1 2mm (0.08 in.) APPROXIMATELY. IF NECESSARY, REMOVE UNWANTED 1000 MATERIAL FROM THE EDGE OF THE BAULKING BRACKET. MAKE SURE THERE IS A MINIMUM DISTANCE FROM THE HOLES TO THE BRACKET EDGE 1.5 xD1_ D1 (TYPICAL) DET. B OF 1.5 x D1 AS SHOWN IN DETAIL B. 145SB780204.MCE FIGURE 2: INSTALATION OF BAULKING BRACKETS (SHEET 03 OF 03) DATE: 04/Oct/2002 S.B. No.: 145-78-0035 REVISION No.: PAGE: 13 ### Page 16 (No text on this page.) ### Page 17 ... SERVICE BULLETIN EVALUATION THE PURPOSE OF THIS FORM IS TO COLLECT DATA THAT WILL BE USED TO IMPROVE THE QUALITY OF OUR SERVICE BULLETINS AND UPDATE THE TECHNICAL PUBLICATION. PLEASE FILL IN FORM AND RETURN IT TO: EMBRAER – EMPRESA BRASILEIRA DE AERONÁUTICA S.A. TECHNICAL PUBLICATIONS AV. BRIG. FARIA LIMA, 2170 SÃO JOSÉ DOS CAMPOS - SP - 12227-901 BRASIL Fax: ++ 55 12 3927-7546 e-mail: distrib@embraer.com.br S.B. Title: S.B.: (Number / Rev.) EXHAUST – REPLACEMENT OF THRUST REVERSER TRANSIT SWITCHES 145-78-0035 / 03 Operator: Aircraft serial number affected: (per S.B. effectivity list) PRE-ACCOMPLISHMENT EVALUATION: (check applicable squares below) [ ] WILL BE ACCOMPLISHED ON FIRST A/C [ ] WILL BE ACCOMPLISHED AS REQUIRED [ ] WILL BE ACCOMPLISHED ON FLEET [ ] DECISION DEFERRED (Explain below) [ ] UNECONOMICAL [ ] SERVICE EXPERIENCE DOES NOT JUSTIFY [ ] OPERATIONAL ENVIRONMENT DOES NOT JUSTIFY [ ] WILL NOT BE ACCOMPLISHED: [ ] OTHER (Explain below) POST-ACCOMPLISHMENT EVALUATION: (Check applicable squares below) ESTIMATED MANPOWER: [ ] OK [ ] NOT OK (Explain below) MATERIAL & KITS: [ ] OK [ ] NOT OK (Explain below) ACCOMPLISHMENT INSTRUCTIONS: [ ] OK [ ] NOT OK (Explain below) FIGURES: [ ] OK [ ] NOT OK (Explain below) SB GENERAL EVALUATION: [ ] OK [ ] NOT OK (Explain below) COMMENTS: (Bulletin quality/ Difficulties found at the time of incorporation/ Suggested improvements/ Other) Organization: Fax: Phone: E-mail: Address: Prepared by: (Name/ Title) Date: ### Page 18 (No text on this page.) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). 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