# General Electric Service Bulletin CF34-8C-AL 75-0019 Copy: Revision 01 ("CF34-8C-AL SB 75-0019 R00"), 19 pages: PDF https://openairdocs.org/files/sha256/ce/89/ce89597846c67e88b0b6ceb5b9e170b35891d0cec590c45b6d5f162f5bdc5395; text https://openairdocs.org/service-documents/ge/cf34-8c-al-75-0019/file/ce89597846c6.md. Rights: © General Electric Company. Filed by the FAA in regulations.gov docket FAA-2017-1000; AD 2017-23-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. ## Details - Manufacturer: [General Electric](https://openairdocs.org/service-documents/ge.md) - Type: Service bulletin (Service Bulletin) - Number: CF34-8C-AL 75-0019 - Latest revision known: CF34-8C-AL 75-0019, Revision 01, dated October 24, 2017 (OpenAirDocs) - Page: https://openairdocs.org/service-documents/ge/cf34-8c-al-75-0019 ## ADs that cite it (1) (OpenAirDocs) Newest first, with the revision each names, as OpenAirDocs read it from the AD's text. - [AD 2017-23-06](https://openairdocs.org/ad/2017-23-06.md), effective Nov 30, 2017: Revision 01 ## Text (19 pages) Rights: © General Electric Company. Filed by the FAA in regulations.gov docket FAA-2017-1000; AD 2017-23-06 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 CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links Date Printed: 2017/09/19 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 1 of 19 CF34-8C SERVICE BULLETIN - 75-0019 R00 Revised:08/04/2017 SB 75-0019 R00 AIR - ECS LH AND RH DUCTING INSTALLATION (75-00-01) - INSPECTION OF OBV FITTINGS AND OBV SYSTEM LINKS Issued: 08/04/2017 GE PROPRIETARY INFORMATION The information contained in this document is GE proprietary information and is disclosed in confidence. It is the property of GE and shall not be used, disclosed to others or reproduced without the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modifications, spare parts, designs, or configuration changes or to obtain FAA or any other government or regulatory approval to do so. If consent is given for reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such reproduction in whole or in part. This technical data is considered EAR controlled pursuant to 15 CFR Parts 730-774 respectively. Transfer of this data by any means to a Non-US Person, whether in the United States or abroad, without the proper U.S. Government authorization (e.g., License, exemption, NLR, etc.), is strictly prohibited. Copyright (2017) General Electric Company, U.S.A. 1. PLANNING INFORMATION A. Effectivity * * * CF34-8C1/-8C5/-8C5A1/-8C5B1 This Service Bulletin is applicable to all CF34-8C engines. The operability bleed start valve [operability bleed valve (OBV)] and OBV system rod links are affected by this Service Bulletin. B. Description This Service Bulletin provides the instructions to inspect all the CF34-8C OBVs for fuel leakage and loose rosan fittings and all OBV system rod links for worn uniballs. C. Compliance Category 2 GE recommends that you do this Service Bulletin as soon as possible without effect on revenue service, no later than the next letter check but not exceeding 1,000 flight hours from this Service Bulletin issue date. Impact A This recommendation is to address a condition that may affect Flight Safety. NOTE:For the engines that are not currently installed on the aircraft, such as ### Page 2 CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links Date Printed: 2017/09/19 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 2 of 19 engines in shop level maintenance, spare engines, and engines in storage, it is recommended that this inspection is done at the earliest convenience and before engine operation. NOTE:This Service Bulletin can be done on wing and in shop. This Service Bulletin is offered to improve the reliability or performance of your GE product, or to help prevent the occurrence of the event or condition described in this Service Bulletin. If the operator elects not to participate in the bulletin, that decision will be taken into consideration by GE in evaluating future product performance issues that may arise in the operator's fleet. D. Concurrent Requirements None. E. Reason (1) Objective: To reduce the potential for fuel leaks and undercowl fire events. (2) Condition: There have been two undercowl fire events due to OBV separated fittings. Refer to the All Operator's Wire (AOW) 17-CF34-006. (3) Cause: Undercowl fire events have been experienced due to the pull out of the rosan fitting from the OBV. The cause for the rosan fitting pulling out is under investigation. (4) Inspection: The inspection is for all the CF34-8C OBV systems to identify possible loose or leaking OBV fittings or worn system rod links. NOTE:This one-time inspection is a containment plan only. The final improvement will be provided by a future Service Bulletin. (5) Substantiation: Substantiation is by fleet experience. F. Approval The data contained in this Service Bulletin has been reviewed by the FAA or authorized entity representing the FAA and the repair(s) and modification(s) herein comply with the applicable Aviation Regulations and are APPROVED for installation in the model(s) listed in this Service Bulletin. G. Manpower After you get access to the OBV, you will need approximately 0.5 man-hour to do the inspection portion of this Service Bulletin. H. Weight and Balance Weight and balance are not changed. I. References (Use the latest version of these documents) All Operator's Wire (AOW) 17-CF34-006 Bombardier CRJ700/900/1000 Aircraft Maintenance Manual (AMM) GEK 9250, Commercial Engine Standard Practices Manual (SPM) GEK 105091, CF34-8C Engine Manual (EM) GEK 105091-1, CF34-8C Line Maintenance Manual (LMM) GEK 105092, CF34-8C Illustrated Parts Catalog (IPC) CF34-8C S/B , AIR - Environmental Control System75-0014 (75-00-01) - Introduction of Redesigned Bleed Air Manifold and Associated Components for the Operability Bleed Start Valve J. Publications Affected None. ### Page 3 CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links Date Printed: 2017/09/19 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 3 of 19 K. Interchangeability Not applicable. L. Software Accomplishment Summary Not applicable. 2. MATERIAL INFORMATION A. Material - Price and Availability (1) Parts necessary to do this Service Bulletin: None. (2) Other Spare Parts: Part Number Qty/ Eng Part Name Unit ($) Price Pkg Qty Lead Time Days 4123T71P04* (1) Valve, Operability Bleed Start Quote (1) Quote AS1895-1-225 (2) Coupling, Single Latch V-Retainer Quote (1) Quote AS1895-7-225 (2) Seal, E Quote (1) Quote B0308015** (AR) Bearing, Rod End NP (-) -- B0202019-11** (AR) Washer, Locking NP (-) -- CN627-0082-201** (AR) Bush NP (-) -- CN627-0045-201 ** (AR) Bush NP (-) -- NP = Not Provisioned NOTE:Prices are provided for planning purposes and are subject to change. *Part not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact the following: Parker Aerospace Aircraft On Ground (AOG) U.S.A. Phone: +1(949)809-8200 Commercial Purchase Order/Customer Service/Technical Inquiry USA Phone: +1(949)809-8200 E-mail: CRC@parker.com Fax: +1(949)272-3255 Commercial Spares Quotes(RFQ) USA Phone: +1(949) 809-8200 E-mail: aerospacerfq@parker.com **Part not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact the following: Bombardier E-mail: AOG@aero.bombardier.com 24/7 AOG phone: +1-844-272-2720 (3) Consumables: None. B. Industry Support Information None. C. Configuration Chart None. D. Parts Disposition ### Page 4 CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links Date Printed: 2017/09/19 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 4 of 19 Discard unserviceable or worn rod ends, bushings, or washers. Send the unserviceable OBV for repair to the following address: Parker Aerospace Aircraft On Ground (AOG) U.S.A. Phone: +1(949)809-8200 Commercial Purchase Order/Customer Service/Technical Inquiry USA phone: +1(949)809-8200 E-mail: CRC@parker.com Fax: +1(949)272-3255 Commercial Spares Quotes(RFQ) USA phone: +1(949) 809-8200 E-mail: aerospacerfq@parker.com E. Tooling - Price and Availability None. 3. ACCOMPLISHMENT INSTRUCTIONS A. General (1) Before you start this procedure, read the assembly and disassembly techniques section. Refer to GEK 9250, 70-10-00, ASSEMBLY AND DISASSEMBLY TECHNIQUES. (2) Do a visual inspection of all the engine parts that you can see when you do maintenance. Examine all parts that are removed and that you will install again. Examine all engine parts that are not removed, but that you can see during maintenance. Refer to GEK 105091, 05-31-00, ENGINE MAINTENANCE PROGRAM. (3) If the engine is on wing, do the job setup. Refer to the Bombardier CRJ700/900/1000 AMM, 75-31-01, TASK 75-31-01-000-801. B. Inspection (1) Do not remove the OBV or the fuel lines around and do a(Figure 1) detailed visual inspection of all the OBV fittings. (2) Refer to the Table 1 below for the inspection details, unserviceable criteria, and actions. Table 1. OBV Inspection Inspection Unserviceable Criteria Action Fuel leakage from all the OBV fittings. A clean trail through the normally stained/dirty rosan ring is an indicative of fuel leakage. Fuel wetting observed in the rosan ring flange or port joint. Refer to Figure 1. Replace the OBV immediately. Refer to the Bombardier CRJ700/900/1000 AMM, 75-31-01, REMOVAL/INSTALLATION or GEK 105091-1, 75-00-00, SPECIAL PROCEDURES 007 for the removal instructions and route it for repair. All OBV fittings wiggle check. Relative movement observed between the rosan fitting and the OBV housing when the B-nut is wiggled with forefinger and thumb pressure. Refer to Figure 2. Replace the OBV immediately. Refer to the Bombardier CRJ700/900/1000 AMM, 75-31-01, REMOVAL/INSTALLATION or GEK 105091-1, 75-00-00, SPECIAL PROCEDURES 007 for the removal instructions and route it for repair. (3) Document the findings in the Inspection Chart Form and send(Figure 9) the results to GE. Refer to step 3.B.(8). ### Page 5 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links NOTE: (*) THE ROSAN FITTING IS THE THREADED INSERT ON EACH OF THE OBV FUEL PORTS. DRAIN PORT INSPECTION AREA RETURN PORT INSPECTION AREA OBV SUPPLY PORT INSPECTION AREA *ROSAN RING ROSAN FITTING ASSEMBLY (TYPICAL) 5042950-00 OBV Fuel Leakage Inspection Figure 1 GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG 5 of 19 authorization, is strictly prohibited. ### Page 6 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links OBV FITTING OBV HOUSING SUPPLY FITTING INSPECTION OBV - OBV FITTING HOUSING - RETURN FITTING INSPECTION OBV HOUSING OBV FITTING 5042951-00 OBV Fittings Wiggle Check Figure 2 (4) If the OBV is unserviceable, remove and replace it with a serviceable OBV. Refer to the Bombardier CRJ700/900/1000 AMM, 75-31-01, REMOVAL/INSTALLATION Or GEK 105091-1, 75-00-00, SPECIAL PROCEDURES 007. (5) For pre-CF34-8C S/B 75-0014 configuration, do an inspection of the bleed air manifold (01-430, 75-00-01, Figure 3) link rod assemblies and their attaching hardware. Do not disassemble the link rod assemblies while you do the inspection and do as follows: (a) Use finger force (thumb and index) to do an inspection of the two ends of the support links (01-310, 01-450, 01-560A, and 01-570B, 75-00-01, Figure 4) for loose or missing uniballs. Make sure that the link rod assemblies (01-310, 01-450, 01-560A, and 01-570B) show no radial displacement. Refer to Figure 3 and Figure 4 for details. GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 6 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 7 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links (b) If there is movement of the installed rod end, do as follows: 1 Push the right side of the rod end and measure the left side rod end uniball proud dimension. Push the left side of the rod end and measure the right side rod end uniball proud dimension. NOTE:Unacceptable wear is present if the uniball can be displaced radially by finger force and the face of the rod end uniball is observed to protrude 0.020 inch (0.51 mm) or less from the adjacent parallel face of the rod end (Figure 3 and Figure 4). RADIAL DISPLACEMENT LINK ROD ASSEMBLY BLEED AIR TYPICAL MANIFOLD (01-430) NOTE: ALL IPC REFERENCES FROM 75-00-01 UNLESS SPECIFIED DIFFERENTLY. 5042953-00 Link Rod Assembly (Pre-CF34-8C S/B 75-0014) Figure 3 GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 7 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 8 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links PWD FWD LINK ROD ASSEMBLY (01-310) NOTE: C ALL IPC REFERENCES FROM 75-00-01 UNLESS SPECIFIED DIFFERENTLY. 5042954-00 Link Rod Assemblies Inspection (Pre-CF34-8C S/B 75-0014) Figure 4 (Sheet 1) GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 8 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 9 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links LINK ROD ASSEMBLY (01-450) LINK ROD ASSEMBLY (01-560A) LINK ROD ASSEMBLY (01-570B) NOTE: ALL IPC REFERENCES FROM 75-00-01 UNLESS SPECIFIED DIFFERENTLY. 5042955-00 Link Rod Assemblies Inspection (Pre-CF34-8C S/B 75-0014) Figure 4 (Sheet 2) GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 9 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 10 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links ROD END *0.020 MINIMUM (0.51) *0.020 MINIMUM (0.51) * ROD END UNIBALL NOTES: 1. DIMENSIONS ARE IN INCHES WITH MILLIMETERS IN PARENTHESES. 2. (*) DIMESIONS EQUAL OR LESS THAN 0.020 (0.51) ARE NOT PERMITTED. DIMENSIONS MORE THAN 0.020 (0.51) ARE PERMITTED. 5042952-00 Link Rod Assemblies Inspection (Pre-CF34-8C S/B 75-0014) Figure 4 (Sheet 3) (c) If one or more of the link rod assemblies (01-310, 01-450, 01-560A, and/or 01-570B, 75-00-01, Figure 4) or their attaching hardware have wear beyond the limits specified in steps 3.B.(5)(a) and 3.B.(5) (b), remove and replace the damaged hardware with a serviceable part, one at a time. Refer to Figure 5 and GEK 105091-1, 75-00-00, SPECIAL PROCEDURES 010, Subtask 75-00-00-051-029 and Subtask 75-00-00-051-030 for the removal instructions and Subtask 75-00-00-451-024 and Subtask 75-00-00-451-027 for the installation instructions. NOTE: Some of the link rod assembly catalog sequence numbers (CSNs) could not be mentioned in GEK 105091-1, 75-00-00, SPECIAL PROCEDURES 010. GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 10 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 11 CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links Date Printed: 2017/09/19 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 11 of 19 For those cases, the parts identified with the base CSNs or part numbers are used for the applicable removal/installation instructions and must be used in accordance with GEK 105092, CF34-8C IPC. NOTE:Before you disassemble the removed link rod assembly, the total length from rod end to rod end must be measured. (d) In order not to use alignment tooling and reduce the adjustment cycle, it is recommended to measure the removed link rod assemblies (01-310, 01-450, 01-560A, and 01-570B, 75-00-01, before disassembly,Figure 4) set-up the length as the baseline for new part setup, count the threads, and measure the rod end uniball center to center length. NOTE:If no serviceable link rod assembly hardware is available for the replacement, the engine can be returned to service for an additional 50 flight cycles if the OBV rosan rings and fittings are examined for fuel leaks and looseness as in Table 1, at the end of each flight day. (e) Document the findings in the Inspection Chart Form and(Figure 9) send the results to GE. Refer to step 3.B.(8). ### Page 12 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links ROD END UNIBALL SERVICEABLE ROD END WORN ROD END ROD END UNIBALL SERVICEABLE ROD END WORN ROD END 5042956-00 Serviceable and Worn Rod Ends (Pre-CF34-8C S/B 75-0014) Figure 5 (6) For post-CF34-8C S/B 75-0014 configuration, do an inspection of the bleed air manifold (01-430, 75-00-01, Figure 6) link rod assemblies and their attaching hardware. Do not disassemble the link rod assemblies while you do the inspection and do as follows: (a) Use finger force (thumb and index) to do an inspection of the two ends of the support links (01-310A, 01-450, and 01-560B, 75-00-01, Figure 7) for loose or missing uniballs. Make sure that the link rod assemblies (01-310A, 01-450, and 01-560B) show no radial displacement. Refer to Figure 6 and Figure 7 for details. (b) If there is movement of the installed rod end, do as follows: 1 Push the right side of the rod end and measure the left side rod end uniball proud dimension. GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 12 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 13 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links Push the left side of the rod end and measure the right side rod end uniball proud dimension. NOTE:Unacceptable wear is present if the uniball can be displaced radially by finger force and the face of the rod end uniball is observed to protrude 0.020 inch (0.51 mm) or less from the adjacent parallel face of the rod end (Figure 6 and Figure 7). RADIAL DISPLACEMENT LINK ROD ASSEMBLY BLEED AIR TYPICAL MANIFOLD (01-430) NOTE: ALL IPC REFERENCES FROM 75-00-01 UNLESS SPECIFIED DIFFERENTLY. 5042957-00 Link Rod Assembly (Post-CF34-8C S/B 75-0014) Figure 6 GE PROPRIETARY INFORMATION - Not to be used, disclosed to 2017/09/19 Date Printed: others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; 13 of 19 Page transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 14 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links FWD LINK ROD ASSEMBLY (01-310A) NOTE: C ALL IPC REFERENCES FROM 75-00-01 UNLESS SPECIFIED DIFFERENTLY. 5042958-00 Link Rod Assemblies Inspection (Post-CF34-8C S/B 75-0014) Figure 7 (Sheet 1) GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 14 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 15 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links LINK ROD ASSEMBLY (01-450) LINK ROD ASSEMBLY (01-560B) LINK ROD ASSEMBLY (01-560B) e NOTE: ALL IPC REFERENCES FROM (3 LOCATIONS) (TYPICAL) 75-00-01 UNLESS SPECIFIED DIFFERENTLY. 5042959-00 Link Rod Assemblies Inspection (Post-CF34-8C S/B 75-0014) Figure 7 (Sheet 2) GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 15 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 16 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links ROD END *0.020 MINIMUM (0.51) *0.020 MINIMUM (0.51) ROD END UNIBALL NOTES: 1. DIMENSIONS ARE IN INCHES WITH MILLIMETERS IN PARENTHESES. 2. (*) DIMESIONS EQUAL OR LESS THAN 0.020 (0.51) ARE NOT PERMITTED. DIMENSIONS MORE THAN 0.020 (0.51) ARE PERMITTED. 5042796-00 Link Rod Assemblies Inspection (Post-CF34-8C S/B 75-0014) Figure 7 (Sheet 3) (c) If one or more of the link rod assemblies (01-310A, 01-450, and/or 01-560B, 75-00-01, Figure 7) or their attaching hardware have wear beyond the limits specified in steps 3.B.(6)(a) and 3.B.(6) (b), remove and replace the damaged hardware with a serviceable part, one at a time. Refer to Figure 8 and GEK 105091-1, 75-00-00, SPECIAL PROCEDURES 010, Subtask 75-00-00-051-029 and Subtask 75-00-00-051-031 for the removal instructions and Subtask 75-00-00-451-024 (paragraph 3.I.) and Subtask 75-00-00-451-027 for the installation instructions. NOTE: Some of the link rod assembly CSNs could not be mentioned in GEK 105091-1, 75-00-00, SPECIAL PROCEDURES 010. For those cases, the parts GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 16 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 17 CF34-8C Service Bulletins (SBs) SB 75-0019 R00 AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links Date Printed: 2017/09/19 GE PROPRIETARY INFORMATION - Not to be used, disclosed to others or reproduced without the express written consent of GE. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. Page 17 of 19 identified with the base CSNs or part numbers are used for the applicable removal/installation instructions and must be used in accordance with GEK 105092, CF34-8C IPC. NOTE:Before you disassemble the removed link rod assembly, the total length from rod end to rod end must be measured. (d) In order not to use alignment tooling and reduce the adjustment cycle, it is recommended to measure the removed link rod assemblies (01-310A, 01-450, and 01-560B, 75-00-01, before disassembly, set-upFigure 7) the length as the baseline for new part setup, count the threads, and measure the rod end uniball center to center length. NOTE:If no serviceable link rod assembly hardware is available for the replacement, the engine can be returned to service for an additional 50 flight cycles if the OBV rosan rings and fittings are examined for fuel leaks and looseness as in Table 1, at the end of each flight day. (e) Document the findings in the Inspection Chart Form and(Figure 9) send the results to GE. Refer to step 3.B.(8). ### Page 18 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links ROD END UNIBALL SERVICEABLE ROD END WORN ROD END ROD END UNIBALL SERVICEABLE ROD END WORN ROD END 5042960-00 Serviceable and Worn Rod Ends (Post-CF34-8C S/B 75-0014) Figure 8 (7) If the engine is on wing, put the aircraft back to its usual condition. Refer to the Bombardier CRJ700/900/1000 AMM, 75-31-01, TASK 75-31-01-400-801, Step 5 (Close Out). (8) Send a copy of the Inspection Chart Form (Figure 9) to the GE Product Support Engineering (PSE): * Alan Morales (Alan.Morales@ge.com) GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page GE. Technical data is considered ITAR and/or EAR controlled; 18 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. ### Page 19 (OCR) CF34-8C Service Bulletins (SBs) SB 75-0019 ROO AIR - ECS LH and RH Ducting Installation (75-00-01) - Inspection of OBV Fittings and OBV System Links INSPECTION CHART ENGINE SERIAL NUMBER: TIME SINCE NEW (TSN): AIRCRAFT REGISTRATION: CYCLES SINCE NEW (CSN): POSITION: DATE: PLENUM/MANIFOLD CONFIGURATION: OBV SN: LEAKAGE TRACES IN THE SUPPLY RETURN DRAIN OBV PORT JOINTS FOUND? FITTING FITTING FITTING YES NO OBV FUEL FITTING FOUND LOOSE (WIGGUNG)? YES NO WERE LINK ROD ASSEMBLIES (01-560A, ROD END BEARING OTHER 01-570B, 01-450, OR 01-310, 75-00-01) WORN? PLENE D CASE PLENERLD CASE SPECIFY FRONT RIGHT FRONT LEFT REAR 10" STAGE DUCT WERE LINK ROD ASSEMBLIES ROD END BEARING OTHER WORN? (01-560B, 01-450, OR 01-310A, 75-00-01) IANIFOLI LENI CASE MANIFOLD PLENUM CASE SPECIFY FRONT RIGHT FRONT LEFT REAR 10" STAGE DUCT INSPECTION PERFORMED BY: NOTE: WRITE N/A WHEN THE REQUEST IS NOT APPLICABLE TO YOUR ENGINE CONFIGURATION. 5042961-00 Inspection Chart Form Figure 9 GE PROPRIETARY INFORMATION - Subject to the restrictions on the media. GE PROPRIETARY INFORMATION - Not to be used, disclosed to Date Printed: others or reproduced without the express written consent of Page 2017/09/19 GE. Technical data is considered ITAR and/or EAR controlled; 19 of 19 transfer of this data to a Non-US Person, without USG authorization, is strictly prohibited. --- 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.