AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

GE PROPRIETARY INFORMATION The information contained in this document is GE proprietary information and is disclosed in con fi dence. 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, modi fi cations, spare parts, designs, or con fi guration changes or to obtain FAA or any other government or regulatory approvalto do so. If consentis givenfor reproduction inwhole or inpart,this notice andthe 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,withouttheproperU.S.Government authorization (e.g., License, exemption,NLR, etc.), is strictly prohibited. Copyright (2012) GeneralElectric Company, U.S.A.

September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 1 of 8AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

1. P LA N N I N G I N F O R M A T I O N A. E ff e ct i v i ty CF34-8C1/-8C5/-8C5A1/-8C5A2/-8C5A3/-8C5B1 This Service Bulletin is applicable to all CF34-8C engines. The operability bleed start valves (OBVs) VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04) are affected by this Service Bulletin. B. D e s c r i p t i o n This Service Bulletin provides instructions to replace OBVs VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04) with an OBV VIN 5000728-104 (P/N 4123T71P02), VIN 5000728-106 (P/N 4123T71P03), or VIN 5080046-101 (P/N 4123T71P04). N O T E : If OBV VIN 5000728-104 (P/N 4123T71P02), VIN 5000728-106 (P/N 4123T71P03), or VIN 5080046-101 (P/N 4123T71P04) is currently installed, compliance to this Service Bulletin is not required. C. C o m p l i a n c e Category 2 GE recommends that you do this Service Bulletin as soon as possible without effect on revenue service on OBVs VIN 3291552-2 (P/N 4124T67P02) and VIN 3291552-4 (P/N 4121T67P04) before the OBV reaches 12,000 operation hours. If the OBV has more than 6,000 operation hours, this Service Bulletin must be incorporated within 6,000 operation hours or 24 months of the initial issuance of this Service Bulletin, whichever comes fi rst. If the OBV has less than 6,000 operation hours, this Service Bulletin must be incorporated before reaching 12,000 operation hours. N O T E 1 : For the purposes of this Service Bulletin, total OBV time is the total operational time of the OBV in hours when known or based on OBV production date. If none of this information is available, assume the total OBV time to be greater than 12,000 operation hours. N O T E 2 : This Service Bulletin can be accomplished on wing or 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 fl eet. D. C o n c u r re n t R e q u i re m e n t s None.
September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 2 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

E. R e a s o n (1) Objective: To remove parts from service and reduce signi fi cant events. (2) Condition: The current OBVs have experienced three fi tting failures or pull out events, resulting in fuel leaks. Two of those events resulted in engine fi res. Approximately 10 percent of the OBVs returned for overhaul and repair have exhibited loose or leaking fi ttings. (3) Cause: Evaluation of the event OBV units and other returned valves revealed that failures were due to a combination of manufacturing variation and external fuel line loads with the current fi tting design. (4) Improvement: The affected OBV must be replaced with an OBV VIN 5000728-104 (P/N 4123T71P02), VIN 5000728-106 (P/N 4123T71P03), or VIN 5080046-101 (P/N 4123T71P04). These OBV part numbers have not displayed a similar failure mode in the fi eld or when returned to the original equipment manufacturer (OEM) shop. These OBVs also do not have the fi tting design associated with OBVs VIN 3291552-2 (P/N 4121T67P02) or VIN 3291552-4 (P/N 4121T67P04). (5) Substantiation: Substantiation is by comparative analysis and fl eet experience. F. A p p rova l This Service Bulletin has been reviewed by the FAA and the repair(s) and modi fi cation(s) herein comply with the applicable Federal Aviation Regulations and are FAA APPROVED for installation in the model(s) listed in this Service Bulletin. G. M a n p o w e r After you get access to the OBV, you will need approximately 1 man-hour to do the replacement portion of this Service Bulletin. H. We i g h t a n d B a l a n c e Weight and balance are not changed. I. R e f e re n c e s (Use the latest version of these documents) GEK 105091, CF34-8C Engine Manual (EM) GEK 105092, CF34-8C Illustrated Parts Catalog (IPC)
September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 3 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

GEK 105142, Component Maintenance Manual (CMM) GEK 112048, Component Maintenance Manual (CMM) N O T E : The reference documents listed below are for the engine manufacturer's internal use only: BPP: 12-72-00-01 J. P u b l i cat i o n s Aff e ct e d GEK 105092, CF34-8C Illustrated Parts Catalog (IPC) GEK 105142, Component Maintenance Manual (CMM) K. I n t e rc h a n g e a b i l i ty One-way interchangeable. L. S o ftw a re A c c o m p l i s h m e n t S u m m a ry Not applicable.
2. M A T E R I A L I N F O R M A T I O N A. M at e r i a l

- P r i c e a n d Ava i l a b i l i ty (1) Parts necessary to do this Service Bulletin:

P a rt N u m b e r Q ty / E n g P a rt N a m e U n i t ( $ ) P r i c e P kg Q ty L e a d Ti m e D ays VIN 5000728-104 (4123T71P02) (1) Valve, Operability Bleed Start Quote (-) Quote

OR VIN 5000728-106 (4123T71P03) (1) Valve, Operability Bleed Start Quote (-) Quote

OR VIN 5080046-101 (4123T71P04) (1) Valve, Operability Bleed Start Quote (-) Quote

N O T E : Prices are provided for planning purposes and are subject to change.

September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 4 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

(2) Other Spare Parts: None. (3) Consumables: None. B. I n d u s t ry S u p p o rt I n f o r m at i o n (1) GE is pleased to offer labor support for on-wing labor required for the incorporation of this Service Bulletin:



# . After the removal of each affected OBV, GE will provide a material credit for up to 2 man-hours of labor.



# . The effective start date of this commitment is the date of receipt at GE of a signed commitment sheet (APPENDIX A). (2) For each OBV removed, in order to comply with this Service Bulletin:



# . Customer may place a warranty claim for up to 2 man-hours of labor for each OBV identi fi ed in this Service Bulletin.



# . Support is available for work completed in accordance within the Category 2 time compliance period of this Service Bulletin but no later than December 31, 2015.



# . Submit Warranty Claim contained in this Service Bulletin to your GE Warranty Administrator: Send a number to: SCEO Warranty Administration Customer Product Support GE Aviation One Neumann Way, Room 111 Cincinnati, Ohio 45215-1988 U.S.A. Fax: (513) 552-5081



# . Claims must be submitted on a per part basis, unless otherwise stated in a written agreement by GE, and submitted within 12 months from the time of completion, but no later than December 31, 2016.



# . Claims must have complete information, including: OBV part number (P/N), OBV serial number (S/N) OBV time since new (TSN), engine serial number (ESN) that OBV was removed from, and date in which the work was completed, CF34-8C S/B 75-0017, and CS-13915-F7A.

September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 5 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

C. C o n fi g u rat i o n C h a rt

N e w P a rt N u m b e r Q ty / E n g P a rt N a m e O l d P a rt N u m b e r / I P C L o c at i o n Q ty / E n g O p C o d e C h g/ S p rt C o d e 4121T03G01/ G02/G03/G04/ G05 (X) Engine Assembly, CF34-8C1 Turbofan (SIN 00100) 4121T03G01/ G02/G03/G04/ G05 (X) RM -/-

4157T23G01/ G02/G04 (X) Engine Assembly, CF34-8C5/-8C5B1/ -8C5A1/-8C5A2/ -8C5A3 Turbofan (SIN 00100) 4157T23G01/ G02/G04 (X) RM -/-

.CN627-0001-001 (X) Ducting Installation, ECS LH .CN627-0001-001 (X) RM -/- .CN627-0001-002 (X) Ducting Installation, ECS RH .CN627-0001-002 (X) RM -/-

..VIN 5000728-104 (4123T71P02) (1) Valve, Operability Bleed Start (SIN 60200) ..VIN 3291552-2 (4121T67P02) 75-30-03-01-001 75-30-03-01-005 (1) RE 1/A

..VIN 5000728-104 (4123T71P02) (1) Valve, Operability Bleed Start (SIN 60200) ..VIN 3291552-4 (4121T67P04) 75-30-03-01-001A 75-30-03-01-005A (ALT) RE 1/A

OR ..VIN 5000728-106 (4123T71P03) (1) Valve, Operability Bleed Start (SIN 60200) ..VIN 3291552-2 (4121T67P02) 75-30-03-01-001 75-30-03-01-005 (1) RE 1/A

..VIN 5000728-106 (4123T71P03) (1) Valve, Operability Bleed Start (SIN 60200) ..VIN 3291552-4 (4121T67P04) 75-30-03-01-001A 75-30-03-01-005A (ALT) RE 1/A

OR ..VIN 5080046-101 (4123T71P04) (1) Valve, Operability Bleed Start (SIN 60200) ..VIN 3291552-2 (4121T67P02) 75-30-03-01-001 75-30-03-01-005 (1) RE 1/A

..VIN 5080046-101 (4123T71P04) (1) Valve, Operability Bleed Start (SIN 60200) ..VIN 3291552-4 (4121T67P04) 75-30-03-01-001A 75-30-03-01-005A (ALT) RE 1/A

September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 6 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

O p e rat i o n C o d e s RE = Replace RM = Remains C h a n g e C o d e s 1 = One-way interchangeable. S u p p o rt C o d e s A = Old parts will no longer be supplied. D. P a rt s D i s p o s i t i o n Refer to paragraph 2.B., I n d u st ry S u p p o rt I n f o r m at i o n

. E. T o o l i n g - P r i c e a n d Ava i l a b i l i ty None. 3. A C C O M P L I S H M E N T I N S T R U C T I O N S A. R e p l a c e m e n t o f Aff e ct e d O B V s (1) If an OBV VIN 3291552-2 (P/N 4121T67P02) or VIN 3291552-4 (P/N 4121T67P04) is installed, replace the affected part only with an OBV that complies with this Service Bulletin as follows: (a) Removal and installation procedures for the OBV have not changed. Refer to GEK 105091, 72-00-00, SPECIAL PROCEDURE 75 005, TASK 72-00-00-800-828.

September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 7 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.AIR - Operability Bleed Valve (75-30-03) - Replacement of Operability Bleed Start Valve VIN 3291552-2 (P/N 4121T67P02) and VIN 3291552-4 (P/N 4121T67P04)

4. A P P E N D I X A

- I N D U S T RY S U P P O RT A C K N O W L E D G E M E N T To qualify to receive the support speci fi ed in paragraph 2.B., I n d u st ry S u p p o rt I n f o r m at i o n , you must sign this commitment sheet and return it to GE. The support offered in this Service Bulletin is contingent on the customer having an active General Terms Agreement (GTA) for the applicable GE engine model. This offer may not be assigned or otherwise transferred to any other party without the written consent of GE, of which consent shall be in the sole and complete discretion of GE. The offer is extended to the customer based on unique facts and circumstances which the customer hereby acknowledges to be of a non-precedent setting between the customer and GE. The commitment is subject to the terms and conditions of the current General Terms Agreement between the customer and GE for the applicable engine model. Service Bulletin CF34-8C S/B 75-0017 commitment for support. Customer signing of this Commitment Sheet acknowledges customer co mmitment to implement CF34-8C S/B 75-0017 as recommended, according to the terms speci fi ed in paragraph 2.B., I n d u st ry S u p p o rt I n f o r m at i o n for all OBVs identi fi ed in this Service Bulletin. Program support expires December 31, 2015. GE Reference CS-13915-F7A.

Accepted on behalf of (Airline) Approver signature Approver name printed Title Date
Please send signed copy of this acknowl edgement to your GE Customer Support Manager. Please fax this signed Commitment Sheet to GE Warranty Administration, U.S.A.: Fax: (513) 552-5081 If you have any questions, please contact your GE Customer Support Manager.

September 14, 2012 CF34-8C-AL S/B 75-0017 PAGE 8 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.