# CFE Service Bulletin CFE738-72-A8082: No revision named

- Rights: © Honeywell International Inc. Filed by the FAA in regulations.gov docket FAA-2024-0461; AD 2024-12-03 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [CFE Service Bulletin CFE738-72-A8082](https://openairdocs.org/service-documents/cfe/cfe738-72a8082.md)
- Title as filed: CFE Service Bulletin CFE738-72-A8082
- Pages: 16
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## Text

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### Page 1

CFE Company
111 S. 34th Street
Phoenix, Arizona 85034-2802
U.S.A.
CAGE: 0S4A8
Telephone: 800-601-3099 (Toll Free U.S.A./Canada)
Telephone: 602-365-3099 (International Direct)
Website:  https://aerospace.honeywell.com
SERVICE BULLETIN
ALERT
ENGINE - TURBINE SECTION - High Pressure Turbine (HPT) Rotor Assembly - Removal of Specified
Stage 1 and Stage 2 Disks From Service
Legal Notice
This is a CATEGORY 1, SAFETY service bulletin.NOTICE:
Export Control
This CFE Company technical data is licensed by the US Government for ultimate destination of France, and for
redistribution to other eligible countries. Diversion contrary to US law is prohibited.
ECCN: 9E991.
Proprietary Information
THIS DOCUMENT CONTAINS INFORMATION THAT IS THE JOINT PROPERTY OF HONEYWELL 
INTERNATIONAL INC., AND GENERAL ELECTRIC, PARTNERS OF CFE COMPANY. THIS DOCUMENT MAY 
NOT, IN WHOLE OR IN PART, BE DUPLICATED OR DISCLOSED OR USED FOR MANUFACTURE OF THE 
PART DISCLOSED HEREIN, WITHOUT THE PRIOR WRITTEN PERMISSION OF THE OWNER.
CFE738-72-A80824 Jul 2023
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© Honeywell International Inc. Do not copy without express permission of Honeywell.

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HONEYWELL MATERIALS LICENSE AGREEMENT
This document and the information contained herein (“the Materials”) are the proprietary data of Honeywell.
These Materials are provided for the exclusive use of Honeywell-authorized Service Centers; Honeywell-authorized
repair facilities; owners of a Honeywell aerospace product that is the subject of these Materials (“Honeywell
Product”) that have entered into a written agreement with Honeywell relating to the repair or maintenance of
Honeywell Product; and direct recipients of Materials from Honeywell via
https://aerospace.honeywell.com/en/learn/about-us/about-myaerospace that own a Honeywell Product. The
terms and conditions of this Honeywell Materials License Agreement (“License Agreement”) govern your use of
these Materials, except to the extent that any terms and conditions of another applicable agreement with Honeywell
regarding the maintenance or repair of a Honeywell Product and that is the subject of the Materials conflict with
the terms and conditions of this License Agreement, in which case the terms and conditions of the other agreement
will govern. The terms of this License Agreement supersede any other Material License Agreement previously
provided with the Materials, regardless of what form the Materials were provided, including without limitation
when received in hard copy, downloaded via the MyAerospace portal or CD-ROM. However, this License
Agreement will govern in the event of a conflict between these terms and conditions and those of a purchase
order or acknowledgement. Your access or use of the Materials represents your acceptance of the terms of this
License Agreement.
1. License Grant - If you are a party to an applicable written agreement with Honeywell relating to the repair or
maintenance of the subject Honeywell Product, subject to your compliance with the terms and conditions of this
License Agreement, Honeywell hereby grants you, and you accept, a limited, personal, non-transferrable,
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If you are a direct recipient of these Materials from Honeywell’s MyAerospace Technical Publication website and
are not a party to an agreement related to the maintenance or repair of the subject Honeywell Product, subject
to your compliance with the terms and conditions of this License Agreement, Honeywell hereby grants you, and
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to maintain or repair only the subject Honeywell Product installed or intended to be installed on the aircraft you
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Transfer of the Materials to another facility owned by you is permitted only if the original Licensed Facility retains
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agree not to use these Materials for commercial purposes.
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agree that Materials shall only be used for the purpose of the rights granted herein. The Material furnished
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or detail of a Honeywell part, to create a repair for a Honeywell part, design or manufacture any part that is similar
or identical to a Honeywell part, compare a Honeywell part or design of a Honeywell part to another part design,
or apply for FAA PMA or other domestic or foreign governmental approval to manufacture or repair a Honeywell
part. Honeywell International Inc. and its affiliates comply fully with all applicable export control laws and regulations
of the United States and of all countries where it conducts business. In order to satisfy US export control laws,
you confirm that you are not an entity that meets the definition of a military end user in China, Russia, or Venezuela
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End User includes any entity that is part of the national armed services (army, navy, marine, air force, or coast
guard), as well as the national guard and national police, government intelligence or reconnaissance organizations,
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or any person or entity whose actions or functions are intended to support “military end uses.” “Military End Uses”
includes use of an item to support or contribute to the operation, installation, maintenance, repair, overhaul,
refurbishing, development, or production of military items. In addition, you will not divert or in any way utilize or
sell Honeywell products, materials, technology, or technical data to any entity that is a Chinese, Russian, or
Venezuelan Military End User or for Military End Uses, as stated above. You shall immediately notify Honeywell
and cease all activities associated with the transaction in question if it knows or has a reasonable suspicion that
the products, materials, technical data, plans, or specifications may be exported, reexported, or transferred in
support of a prohibited Military End Use or to a Military End User. Failure to comply with this provision is a material
breach of your order and agreement with Honeywell and Honeywell is entitled to immediately seek all remedies
available under law and in equity (including without limitation, termination), without any liability to Honeywell.
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are licensed and not sold under this License Agreement. No license to use any Honeywell trademarks or patents
is granted under this License Agreement.
4. Changes - Honeywell reserves the right to change the terms and conditions of this License Agreement at any
time, including the right to change or impose charges for continued use of the Materials. Honeywell may add,
delete or otherwise modify any portion of the Materials (“Updated Materials”) at any time. You agree to stop
using outdated Materials upon issuance of any Updated Materials.
5. Confidentiality - You acknowledge that these Materials contain information that is confidential and proprietary
to Honeywell. You agree to take all reasonable efforts to maintain the confidentiality of these Materials.
6. Assignment and Transfer - This License Agreement may be assigned to a service center approved and formally
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and liabilities under this License Agreement. No assignment or transfer shall relieve any party of any obligation
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notice from Honeywell, has the right during normal business hours during the term of this License Agreement
and for three (3) years thereafter to visit you and have access to the inside and outside of your facility for the
purpose of inspecting, observing and evaluating your compliance under this License Agreement.
10. Remedies - Honeywell reserves the right to pursue all available remedies and damages resulting from a
breach of this License Agreement.
11. Limitation of Liability - Honeywell makes no representations or warranties regarding the use or sufficiency
of the Materials. THERE ARE NO OTHER WARRANTIES, WHETHER WRITTEN OR ORAL, EXPRESS, IMPLIED
OR STATUTORY, INCLUDING, BUT NOT LIMITED TO (i) WARRANTIES ARISING FROM COURSE OF
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PERFORMANCE, DEALING, USAGE, OR TRADE, WHICH ARE HEREBY EXPRESSLY DISCLAIMED, OR (ii)
WARRANTIES AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF THIRD PARTIES,
EVEN IF HONEYWELL HAS BEEN ADVISED OF ANY SUCH INFRINGEMENT. IN NO EVENT WILL
HONEYWELL BE LIABLE FOR ANY INCIDENTAL DAMAGES, CONSEQUENTIAL DAMAGES, SPECIAL
DAMAGES, INDIRECT DAMAGES, LOSS OF PROFITS, LOSS OF REVENUES, OR LOSS OF USE, EVEN IF
INFORMED OF THE POSSIBILITY OF SUCH DAMAGES. TO THE EXTENT PERMITTED BY APPLICABLE
LAW, THESE LIMITATIONS AND EXCLUSIONS WILL APPLY REGARDLESS OF WHETHER LIABILITY
ARISES FROM BREACH OF CONTRACT, WARRANTY, INDEMNITY, TORT (INCLUDING BUT NOT LIMITED
TO NEGLIGENCE), BY OPERATION OF LAW, OR OTHERWISE.
12. Controlling Law - This License Agreement shall be governed and construed in accordance with the laws of
the State of New York without regard to the conflict of laws provisions thereof.
13. Severability - In the event any provision of this License Agreement is determined to be illegal, invalid, or
unenforceable, the validity and enforceability of the remaining provisions of this License Agreement will not be
affected and, in lieu of such illegal, invalid, or unenforceable provision, there will be added as part of this License
Agreement one or more provisions as similar in terms as may be legal, valid and enforceable under controlling
law.
14. Integration and Modification - This License Agreement sets forth the entire agreement and understanding
between the parties on the subject matter of the License Agreement and merges all prior discussions and
negotiations among them.
Safety Advisory
WARNING: BEFORE THE MATERIALS CALLED OUT IN THIS PUBLICATION ARE USED, KNOW THE
HANDLING, STORAGE AND DISPOSAL PRECAUTIONS RECOMMENDED BY THE MANUFACTURER OR
SUPPLIER. FAILURE TO OBEY THE MANUFACTURERS' OR SUPPLIERS' RECOMMENDATIONS CAN
RESULT IN PERSONAL INJURY OR DISEASE.
This publication describes physical and chemical processes which can make it necessary to use chemicals,
solvents, paints, and other commercially available materials. The user of this publication must get the Safety
Data Sheets (OSHA Hazard Communication Standard (HCS) 29 CFR 1910.1200(g) or equivalent) from the
manufacturers or suppliers of the materials to be used. The user must know the manufacturer/supplier data and
obey the procedures, recommendations, warnings and cautions set forth for the safe use, handling, storage, and
disposal of the materials.
Warranty/Liability Advisory
WARNING: THE CFE COMPANY ASSUMES NO RESPONSIBILITY FOR ANY CFE EQUIPMENT WHICH IS
NOT MAINTAINED AND/OR REPAIRED IN ACCORDANCE WITH THE CFE COMPANY'S PUBLISHED
INSTRUCTIONS AND/OR CFE'S FAA/ODA REPAIR AUTHORIZATION. NEITHER DOES THE CFE COMPANY
ASSUME RESPONSIBILITY FOR SPECIAL TOOLS AND TEST EQUIPMENT FABRICATED BY COMPANIES
OTHER THAN THE CFE COMPANY.
WARNING: INCORRECTLY REPAIRED COMPONENTS CAN AFFECT AIRWORTHINESS OR DECREASE
THE LIFE OF THE COMPONENTS. INCORRECTLY FABRICATED SPECIAL TOOLING OR TEST EQUIPMENT
CAN RESULT IN DAMAGE TO PRODUCT COMPONENTS OR GIVE UNSATISFACTORY RESULTS.
WARNING: ALL TECHNICAL DOCUMENTATION AND INFORMATION CONTAINED HEREIN, WITH RESPECT
TO ASSEMBLY AND DISASSEMBLY, CLEANING, INSPECTION METHODS AND LIMITS, REPAIR METHODS
AND LIMITS, OPERATIONAL LIMITS, LIFE LIMITS AND THE LIKE, HAVE BEEN DEVELOPED AND APPROVED
FOR USE WITH ENGINES AND PARTS THAT HAVE BEEN MANUFACTURED AND/OR APPROVED BY CFE
COMPANY AND THAT HAVE BEEN MAINTAINED IN ACCORDANCE WITH CFE COMPANY TECHNICAL
DOCUMENTATION AND RECOMMENDATIONS. CFE COMPANY HAS NO CONTRACTUAL OR LEGAL
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OBLIGATION FOR, NOR KNOWLEDGE OF, NON-CFE COMPANY-APPROVED PARTS AND REPAIRS.
ACCORDINGLY, THIS DOCUMENT IS NOT INTENDED TO APPLY TO NON-CFE COMPANY-APPROVED
PARTS AND REPAIRS.
WARNING: COMPONENTS IDENTIFIED IN THIS SERVICE BULLETIN CURRENTLY HAVE FAA CERTIFIED
LIFE LIMITS AND MUST BE REPLACED BY THE LIMITS STATED WITHIN THE SERVICE BULLETIN. CFE
COMPANY WILL NOT AUTHORIZE OPERATION BEYOND THE LIFE LIMITS PRESENTED HEREIN AND
THESE LIFE LIMITS CANNOT BE EXTENDED BY THE INDIVIDUAL OPERATORS. IT IS THE RESPONSIBILITY
OF EACH OPERATOR TO ENSURE THAT LIFE LIMIT RECORDS FOR COMPONENTS IDENTIFIED IN THIS
SERVICE BULLETIN ARE CORRECT AND COMPLETE. LIFE LIMITED COMPONENTS WITH NO RECORDED
HOUR OR CYCLE TRACEABILITY SHALL BE IMMEDIATELY REMOVED FROM SERVICE.
WARNING: OPERATION OF AN ENGINE WITH COMPONENTS THAT EXCEED THE LIFE LIMITS IDENTIFIED
IN THIS SERVICE BULLETIN CREATES SUBSTANTIAL RISK TO LIFE AND PROPERTY. SUCH AN ENGINE,
FOR EXAMPLE, MAY MALFUNCTION IN A WAY THAT LEADS TO STRUCTURAL FAILURE. SUCH A FAILURE
COULD INVOLVE EJECTION OF METAL FRAGMENTS FROM THE ENGINE, COULD BE CATASTROPHIC
AND COULD LEAD TO SERIOUS INJURY OR DEATH.
WARNING: CFE COMPANY EXPRESSLY DISCLAIMS LIABILITY FOR ANY AND ALL INJURY OR DEATH
TO PERSONS OR DAMAGES TO PROPERTY, DIRECTLY OR INDIRECTLY CAUSED BY AN ENGINE THAT
IS OPERATED WITH COMPONENTS THAT EXCEED THE CYCLE LIFE LIMITS IDENTIFIED IN THIS SERVICE
BULLETIN. CFE COMPANY FURTHER DISCLAIMS LIABILITY FOR ANY AND ALL INDIRECT,
CONSEQUENTIAL OR INCIDENTAL DAMAGES, AND WILL SEEK INDEMNITY FROM YOU FOR ANY SUCH
DAMAGES.
Copyright - Notice
Copyright 2023 CFE Company. All rights reserved.
CFE Company is a registered trademark of Honeywell International Inc. and General Electric, partners of
CFE Company. All other marks are owned by their respective companies.
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Transmittal Information
ATA Number CFE738-72-A8082 (Publication Number D202305003969)
Summary
This is the INITIAL release.
Refer to Paragraph 4.A. for a list of the acronyms and abbreviations used in this service bulletin.
Revision History
This service bulletin has had no revision(s) as shown in Table 1.
Table 1. Revision History
Revision DateRevision Number
4 Jul 20230
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1. Planning Information
A. Effectivity
(1) This is a CATEGORY 1, SAFETY service bulletin.
NOTE: Category 1 service bulletins address safety issues, typically require urgent
action and are often, but not always, referred to by FAA Airworthiness
Directives. Category 1 bulletins may be labeled ALERT when immediate
attention is required. ALERT service bulletins are printed on light blue paper.
Category 1 bulletins will have variable compliance time which will be specific
to the individual issue.
(2) This service bulletin is applicable to the CFE738-1-1B engines that have installed the
stage 1 HPT rotor disk PN 5127T27P01 and stage 2 HPT rotor disk PN 5127T28P01,
with serial numbers listed in Table 2 and Table 3, respectively.
B. Concurrent Requirements
(1) Not applicable.
C. Reason
WARNING: FAILURE TO OBEY THIS SERVICE BULLETIN COULD CAUSE DISTRESS
OF THE HPT ROTOR ASSEMBLY STAGE 1 AND STAGE 2 DISKS. IF LEFT
UNCORRECTED, THIS DISTRESS COULD CAUSE A MALFUNCTION IN A
WAY THAT LEADS TO STRUCTURAL FAILURE AND COULD CAUSE
SERIOUS INJURY OR DEATH TO PERSONNEL, AND DAMAGE TO OR
LOSS OF THE AIRCRAFT.
(1) Problem:
(a) Components made from nonconforming material do not meet certification life
limits and need to be removed from service.
(2) Background:
(a) Material quality investigation revealed iron contamination in the material, from
which the CFE738 HPT disks stage 1 and stage 2 are made. There were no
field events associated with the discovered non-conformance.
(b) Once the non-conforming material was discovered, CFE Company notified the
FAA and then conducted both engineering and risk assessments to determine
corrective action(s). The risk assessments indicated a safety concern due to
reduced part cycle life, and replacement of the affected stage 1 HPT and stage
2 HPT found in Table 2 or Table 3 during the next major periodic inspection
(MPI), core zone inspection (CZI) or access to the part for cause is
recommended.
(3) Technical Validation:
(a) Substantiation is by analysis.
(4) Benefits:
(a) Nonconforming components will be removed from service.
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(5) Action:
(a) This service bulletin requires that operators review their individual engine records
to determine if stage 1 HPT rotor disk PN 5127T27P01 and stage 2 HPT rotor
disk PN 5127T28P01 with an affected serial number listed in Table 2 or Table
3, is installed.
(b) If an affected stage 1 HPT and/or stage 2 HPT rotor disk serial number identified
in Table 2 or Table 3 is installed, then replacement of stage 1 HPT rotor disk
PN 5127T27P01 and/or stage 2 HPT rotor disk PN 5127T28P01, at the next
MPI, CZI, or access to the part for cause is recommended.
D. Description
(1) This service bulletin provides instructions for the removal and replacement of affected
stage 1 HPT rotor disk PN 5127T27P01 and stage 2 HPT rotor disk PN 5127T28P01,
with serial numbers listed in Table 2 and Table 3, respectively.
E. Compliance
(1) Compliance addresses a safety issue.
(2) CFE recommends compliance with this ALERT service bulletin at the next access to
the affected part (un-stretching the tie rod), the next MPI, CZI, or before the stage 1
turbine rotor disk reaches 2,450 Cycles Since New (CSN) and/or before the stage 2
turbine rotor disk reaches 2,930 CSN, whichever occurs first. Refer to Table 2 for affected
HPT stage 1 disk and Table 3 for affected HPT stage 2 disk serial numbers.
Table 2. Affected HPT Stage 1 Disks
Part Serial Number
CAV62832CAV62534CAV62508
CAV62833CAV62535CAV62509
CAV62834CAV62536CAV62510
CAV62835CAV62538CAV62511
CAV62836CAV62539CAV62512
CAV62837CAV62670CAV62513
CAV62838CAV62671CAV62514
CAV62839CAV62672CAV62519
CAV62840CAV62673CAV62523
CAV62841CAV62674CAV62524
CAV62842CAV62741CAV62525
CAV62843CAV62742CAV62526
CAV62844CAV62743CAV62527
CAV62845CAV62744CAV62529
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Table 2. Affected HPT Stage 1 Disks (Cont)
Part Serial Number
CAV62846CAV62828CAV62530
CAV62848CAV62829CAV62531
CAV63126CAV62830CAV62532
CAV63127CAV62831CAV62533
Table 3. Affected HPT Stage 2 Disks
Part Serial Number
CAV62729CAV62445CAV62414
CAV62730CAV62446CAV62415
CAV62731CAV62448CAV62416
CAV62732CAV62449CAV62417
CAV62733CAV62565CAV62418
CAV62734CAV62566CAV62419
CAV62735CAV62567CAV62420
CAV62737CAV62568CAV62424
CAV62738CAV62569CAV62425
CAV62739CAV62570CAV62426
CAV62740CAV62571CAV62427
CAV63122CAV62644CAV62428
CAV63123CAV62645CAV62441
CAV63124CAV62646CAV62442
-CAV62647CAV62443
-CAV62649CAV62444
F. Approval
(1) The accomplishment instructions are FAA approved.
G. Manpower
(1) No additional man-hours are required to accomplish this change when performed at
MPI or CZI or when repair necessitates access to the affected part.
H. Weight and Balance
(1) None.
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I. Electrical Load Data
(1) Not applicable.
J. Software Accomplishment Summary
(1) Not applicable.
K. References
(1) The sources of information used in the preparation of this service bulletin include CFE
Company engineering documentation and the documents listed in Table 4.
Table 4. Sources of Information
Standard Practices
Manual
Illustrated Parts
Catalog1
Heavy Maintenance
Manual1
Light Maintenance
Manual1Part/Model Number
72-06-0672-06-0172-06-0472-06-03CFE738-1-1B
NOTE:
1. Affected Chapter/Section/Subject 72-50-08.
L. Other Publications Affected
(1) Not applicable.
M. Interchangeability or Intermixability of Parts
(1) Not applicable.
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2. Material Information
A. Material - Price and Availability
(1) Information regarding price and availability of parts may be obtained from Honeywell,
Aerospace Contact Team, Telephone: 800-601-3099 (Toll Free U.S.A./Canada),
602-365-3099 (International Direct).
B. Industry Support Information
(1) Send claims through the Honeywell MyAerospace web portal
(https://aerospace.honeywell.com). Select the Maintenance Plans tab and use the
Claims-Maintenance Programs sub-option.
(2) A special program may be available for this modification, under certain conditions,
providing compliance recommendations of Paragraph 1.E. are met. Information on
special program and availability of parts may be obtained from a CFE
Company-authorized service facility. You can use the “Dealer and Service Center
Locator" tool at https://aerospace.honeywell.com to find approved service locations.
(3) The warranty/program data is listed in Table 5.
NOTE: The procedures outlined in this service bulletin may be accomplished at the
Major Maintenance level or greater.
Table 5. Warranty/Program Data
NoYes1,2Warranty/Program
In Warranty
XOEM Warranty
(Standard new engine warranty)
XSpare Part Warranty
(Standard new spare part warranty)
XSpecial Program Number (SPGM) or Program Code
(Programs in which special pricing and/or special conditions may apply)
XSpecial Pricing Notice (SPN) Number
(Reduction from catalog list pricing, i.e., “P” condition pricing may apply)
Out of Warranty
XSpecial Program Number (SPGM) or Program Code
(Programs in which special pricing and/or special conditions may apply)
XSpecial Pricing Notice (SPN) Number 8
(Reduction from catalog list pricing, i.e., “P” condition pricing may apply)
XCSP/MSP
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C. Material Necessary for Each Engine
(1) The parts required to accomplish the instructions outlined in this service bulletin are
shown in Table 6. Refer to Table 7 for the Instructions/Disposition Codes.
NOTE: Applicable illustrated parts catalogs and spare parts bulletins, dated later
than the original issue date of this service bulletin, may introduce different
parts for installation. Refer to these documents before ordering parts.
NOTE: Expendable parts, discarded in gaining access to the affected area of the
equipment, are not included.
Table 6. Operator-Purchased Material
Instructions/
Disposition Codes
Unit
Price1QtyOld PNKeyword/ NomenclatureNew PN
F15127T27P01HPT Stage 1 Disk5127T27P01
F15127T28P01HPT Stage 2 Disk5127T28P01
NOTE:
1. Refer to Paragraph 2.A. for information regarding price and availability of parts.
Table 7. Instructions/Disposition Codes
DescriptionCode
Dispose of old part according to company practices; replace with like part.Disposition Code F
D. Material Necessary for Each Spare
(1) Not applicable.
E. Re-identified Parts
(1) Not applicable.
F. Tooling - Price and Availability
(1) Not applicable.
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CFE738
The costs of compliance with this service bulletin may be covered by Warranty, MSP, or other Programs marked
with an “X” in the “Yes” column, subject to the terms and conditions of the applicable Warranty, MSP, or other
Programs contracts. This service bulletin in no way alters, modifies, or extends the terms of any Warranty, MSP,
or other Programs contract. For clarification or questions, contact Honeywell Warranty Department at
800-601-3099, Domestic or 602-365-3099, International and select Option No. 2.
2. Send claims through the Honeywell MyAerospace web portal (https://aerospace.honeywell.com). Select Service
& Support and use Warranty & Protection Plans.
NOTES:
1.

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3. Accomplishment Instructions
A. General Information
(1) Obey the precautions.
NOTE: Publications listed in Paragraph 1.K. provide applicable disassembly, cleaning,
inspection, reassembly, and testing instructions and shall be referred to
during the accomplishment of the following instructions.
(2) Perform review of engine logbook and/or HPT rotor assembly part history report to
determine whether the HPT stage 1 disk serial number is found in Table 2 or HPT stage
2 disk serial number is found in Table 3. If one or both disk serial numbers are found in
the table(s) and the bulletin compliance requirements are met per Paragraph 1.E.(2),
proceed to Paragraph 3.B.
B. Remove/Install HPT Stage 1 and Stage 2 Disks
(1) If engine is installed, remove engine from aircraft. Refer to the aircraft maintenance
manual.
(2) Return engine to a CFE738 authorized Major Service Center maintenance level, or
above, for removal of the HPT rotor assembly.
(3) Disassemble engine as required to gain access to the stage 1 HPT and stage 2 HPT
rotor assemblies in accordance with the engine light maintenance manual (LMM) and
heavy maintenance manual (HMM).
(4) Return HPT rotor assembly to the CFE738 authorized Heavy Service Center maintenance
level.
(5) Disassemble the HPT rotor assemblies to remove affected HPT stage 1 disks found in
Table 2, and/or HPT stage 2 disks found in Table 3 from the HPT rotor assembly. Refer
to HMM, 72-50-08, Disassembly.
(6) Install replacement HPT stage 1 and/or stage 2 disks and balance HPT rotor assembly.
Refer to HMM, 72-50-08, Assembly.
(7) Assemble the engine in accordance with the engine LMM and HMM.
(8) Check and ensure proper engine operation in accordance with the LMM, HMM, or
airplane flight manual and/or appropriate aircraft documents.
(9) Make an entry in the engine logbook noting date of compliance, engine operating time,
part number(s) and serial number(s) of installed component(s) (as applicable), and
compliance with this service bulletin (and service bulletin revision number, if applicable).
(10) Complete the Compliance Certificate form in Paragraph 4.B. and send to CFE Company.
CFE738-72-A80824 Jul 2023
Page 13Revision 0, 4 Jul 2023
Publication Number D202305003969
© Honeywell International Inc. Do not copy without express permission of Honeywell.
SERVICE BULLETIN
CFE738

### Page 14

4. Appendix
Appendix A, Acronyms and AbbreviationsA.
(1) Refer to Table 8 for a list of the acronyms and abbreviations used in this service bulletin.
Table 8. List of Acronyms and Abbreviations
Full TermTerm
Air Transport AssociationATA
commercial and government entityCAGE
compact disc-read only memoryCD-ROM
Commercial Fan EnginesCFE
Code of Federal RegulationsCFR
Cycles Since NewCSN
Core Zone InspectionCZI
Export Control Classification NumberECCN
Federal Aviation AdministrationFAA
Hazard Communication StandardHCS
heavy maintenance manualHMM
High Pressure TurbineHPT
light maintenance manualLMM
Major Periodic InspectionMPI
Organization Designation AuthorizationODA
Occupational Safety and Health AdministrationOSHA
Parts Manufacturer ApprovalPMA
part numberPN
quantityQty
revisionRev.
time since newTSN
time since overhaulTSO
CFE738-72-A80824 Jul 2023
Page 14Revision 0, 4 Jul 2023
Publication Number D202305003969
© Honeywell International Inc. Do not copy without express permission of Honeywell.
SERVICE BULLETIN
CFE738

### Page 15 (OCR)

CFE
A Partnership: Honeywell
& General Electric Company
SERVICE BULLETIN
CFE738
B. Appendix B, Certificate of Compliance
To: Operator or Service Center Performing Modification
Upon modification of equipment, please fill in the information requested below, then mail or email the completed
Certificate of Compliance (refer to Figure 1) to:
CFE Company
111 S 34th Street, Mail Stop 503-320
Phoenix, AZ 85034-2802
Email: CFE738DataCenter@honeywell.com
Owner/Operator
Aircraft Model  Aircraft Serial Number
I certify that the following engine/equipment has been modified in accordance with the
listed service bulletins.
ENGINE/EQUIPMENT
NUMBER 1  NUMBER 2  NUMBER 3  NUMBER 4
PART NUMBER  PART NUMBER  PART NUMBER  PART NUMBER
MODEL NUMBER  MODEL NUMBER  MODEL NUMBER  MODEL NUMBER
SERIAL NUMBER  SERIAL NUMBER  SERIAL NUMBER  SERIAL NUMBER
TSN/TSO  TSN/TSO  TSN/TSO  TSN/TSO
CYCLES  CYCLES  CYCLES  CYCLES
SERVICE  SERVICE  SERVICE  SERVICE
BULLETIN  REV.  BULLETIN  REV.  BULLETIN  REV.  BULLETIN  REV.
NUMBER  NUMBER  NUMBER  NUMBER  I NUMBER  NUMBER  NUMBER  NUMBER
NUMBER 1  NUMBER 2  NUMBER 3  NUMBER 4
Signature  Date
Repair Facility
ICN-HNYWL-0000306376-001-99
Figure 1. (Sheet 1 of 1) Certificate of Compliance
4 Jul 2023  CFE738-72-A8082
Revision 0, 4 Jul 2023  Page 15
Publication Number D202305003969
© Honeywell International Inc. Do not copy without express permission of Honeywell.

### Page 16

EMAIL TO
CFE738DataCenter@honeywell.com
CFE738-72-A80824 Jul 2023
Page 16Revision 0, 4 Jul 2023
Publication Number D202305003969
© Honeywell International Inc. Do not copy without express permission of Honeywell.
SERVICE BULLETIN
CFE738

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