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

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 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 8
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)

1. PLANNING INFORMATION

A. Effectivity

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. Description

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).

NOTE: 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. Compliance

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 first.

If the OBV has less than 6,000 operation hours, this Service Bulletin must be

incorporated before reaching 12,000 operation hours.

NOTE 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.

NOTE 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 fleet.

D. Concurrent Requirements

None.

September 14, 2012 CF34-8C-AL S/B 75-0017

PAGE 2

GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first 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. Reason

(1) Objective:

To remove parts from service and reduce significant events.

(2) Condition:

The current OBVs have experienced three fitting failures or pull out events,

resulting in fuel leaks. Two of those events resulted in engine fires.

Approximately 10 percent of the OBVs returned for overhaul and repair have

exhibited loose or leaking fittings.

(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 fitting 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 field or when returned to the original equipment

manufacturer (OEM) shop. These OBVs also do not have the fitting 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 fleet experience.

F. Approval

This Service Bulletin has been reviewed by the FAA and the repair(s) and

modification(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. Manpower

After you get access to the OBV, you will need approximately 1 man-hour to do the

replacement portion of this Service Bulletin.

H. Weight and Balance

Weight and balance are not changed.

I. References (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 first 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)

NOTE: The reference documents listed below are for the engine manufacturer's

internal use only:

BPP: 12-72-00-01

J. Publications Affected

GEK 105092, CF34-8C Illustrated Parts Catalog (IPC)

GEK 105142, Component Maintenance Manual (CMM)

K. Interchangeability

One-way interchangeable.

L. Software Accomplishment Summary

Not applicable.

2. MATERIAL INFORMATION

A. Material - Price and Availability

(1) Parts necessary to do this Service Bulletin:

Part Number

Qty/

Eng Part Name

Unit

($)

Price

Pkg

Qty

Lead

Time

Days

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

NOTE: 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 first 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. Industry Support Information

(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 identified 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 first 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. Configuration Chart

New

Part Number

Qty/

Eng Part Name

Old Part Number/

IPC Location

Qty/

Eng

Op

Code

Chg/

Sprt

Code

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 first 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)

Operation Codes

RE = Replace

RM = Remains

Change Codes

1 = One-way interchangeable.

Support Codes

A = Old parts will no longer be supplied.

D. Parts Disposition

Refer to paragraph 2.B., Industry Support Information.

E. Tooling - Price and Availability

None.

3. ACCOMPLISHMENT INSTRUCTIONS

A. Replacement of Affected OBVs

(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 first 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. APPENDIX A - INDUSTRY SUPPORT ACKNOWLEDGEMENT

To qualify to receive the support specified in paragraph 2.B., Industry Support Information, 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 commitment to implement CF34-8C S/B 75-0017

as recommended, according to the terms specified in paragraph 2.B., Industry Support

Information for all OBVs identified 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 acknowledgement 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 first page.