# Engine Alliance Service Bulletin EAGP7-72-327: No revision named - Rights: © Engine Alliance. Filed by the FAA in regulations.gov docket FAA-2015-3713; AD 2016-05-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Engine Alliance Service Bulletin EAGP7-72-327](https://openairdocs.org/service-documents/engine-alliance/eagp7-72-327.md) - Title as filed: Engine Alliance EAGP7-72-327 - Pages: 8 - PDF: https://openairdocs.org/files/sha256/0a/4e/0a4ee9ecc2ccae76e1d9c405839f24944b46eb1f1e99981617668ad13487fd04 - Page: https://openairdocs.org/service-documents/engine-alliance/eagp7-72-327/file/0a4ee9ecc2cc ## Text This text is 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 (OCR) Engine Alliance SERVICE BULLETIN ENGINE - HIGH PRESSURE COMPRESSOR (HPC) ROTOR ASSEMBLY - LIMITED ENGINE WORKSCOPE FOR REMOVAL AND REPLACEMENT OF THE HPC STAGE 2 THROUGH STAGE 5 SPOOL MODEL APPLICATION GP7270, GP7277 BULLETIN ISSUE SEQUENCE EAGP7 Series 72-327 ATA NUMBER 72-35-20 ENGINE ALLIANCE, LLO. PROPRIETARY INFORMATION The information contained in this document is Engine Alliance, LLC ("EA") Proprietary Information and is disclosed in confidence. It is the property of EA and shall not be used, disclosed to others or reproduced for any purpose, including, without limitation, to design, manufacture or repair parts or to obtain FAA or other government approval to do so, without the express written consent of EA. Neither receipt nor possession of this document alone, from any source, constitutes such permission. Unauthorized possession, use, copying or disclosure may result in criminal and/or civil liability. 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 subject to the Export Administration Regulations (EAR) 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 (i.e. EAR Export Classification: ECCN 9E991 Compliance Category 2 EA Distribution Code 2686 July 21/15 EAGP7-72-327 Page 1 of 8 ### Page 2 (OCR) ER Engine Alance Summary The purpose of this Service Bulletin is to provide instructions for a limited engine disassembly, to remove, and replace the affected HPC stage 2 through stage 5 spool (HPC stages 2-5 spool) PN 382-104-807-0. Planning Information Effectivity Data Engine Models Applicable GP7270, GP7277 Engine Serial Nos. - Any engine that has a HPC stages 2-5 spool with a serial number listed in Table 1 below: Table 1. - List of Affected HPC Stages 2-5 Spool Serial Numbers HPC Stage 2-5 Spool HPC Stage 2-5 Spool Part Number Serial Numbers 382-104-807-0 PA354309 382-104-807-0 PA365755 382-104-807-0 PA395350 382-104-807-0 PA395351 382-104-807-0 PA400593 382-104-807-0 PA440647 382-104-807-0 PA537953 382-104-807-0 PA558943 382-104-807-0 PA585572 382-104-807-0 PA595000 382-104-807-0 PA614325 382-104-807-0 PA664322 382-104-807-0 PA664323 382-104-807-0 PA783040 382-104-807-0 PA827684 382-104-807-0 PA851148 382-104-807-0 PA856693 382-104-807-0 PA861974 382-104-807-0 PC134797 (*) *Hardware has been removed from service at the time Service Bulletin was issued. NOTE: The HPC stages 2-5 spool serial numbers effectivity data contained in this Service Bulletin are taken from the records of parts incorporation during shop visit. EAGP7-72-327 Page 2 ENGINE ALLIANCE, LLC PROPRIETARY INFORMATION ### Page 3 (OCR) Engine Alliance Concurrent Requirements This Service Bulletin must be done at the same time as Reference 4, Service Bulletin No. EAGP7-72-328. Reason Problem: The affected HPC stages 2-5 spools are suspected to have been installed with stage 5 vane assemblies with honeycomb cartridges that were not cut at the correct radial height. This condition increases an interference with seal teeth on the HPC stages 2-5 spool, which does not allow the part to reach the ultimate life objective of the HPC stages 2-5 spool. 2. Cause: The radial height of the affected stage 5 vane assemblies were not inspected appropriately during the implementation of the abradable (honeycomb) replacement repair. 3. Solution: Remove and replace the affected HPC stages 2-5 spool and the associated hardware. Description Remove and replace the affected HPC stages 2-5 spools (listed in Effectivity Data paragraph) and the associated hardware. Compliance Category 2 EA recommends you do this Service Bulletin as soon as possible without effect on revenue service, but before 2,100 cycles since engine shop visit. Approval Data The data contained in this Service Bulletin has been reviewed by the appropriate governmental authority and the repairs) and modification(s) herein comply with the applicable Aviation Regulations and are APPROVED for installation in the model(s) listed in this Service Bulletin. The aircraft TC holder has been informed of this inspection change. Manpower No more man-hours are necessary when done at complete disassembly/assembly. Weight Data No change. Electrical Load Data Not applicable. Software Accomplishment Summary Not applicable. July 21/15 EAGP7-72-327 Page 3 ENGINE ALLIANCE, LLC PROPRIETARY INFORMATION ### Page 4 (OCR) E Engine Alance References 1. Engine Alliance GP7270 and GP7277, Illustrated Parts Catalog, Part No. 5700308. 2. GP7000 Series, Engine Manual, Part No. 5700147. 3. GP7000 Series, Engine Cleaning, Inspection And Repair (CIR) Manual, Part No. 5700309. 4. Service Bulletin No. EAGP7-72-328: ENGINE - HIGH PRESSURE COMPRESSOR (HPC) ROTOR ASSEMBLY — REMOVAL OF THE STAGES 7-9 COMPRESSOR ROTOR SPOOLS FROM SERVICE. Publications Changed Not applicable. Interchangeability Not applicable. Information in the Appendix Alternate Accomplishment Instructions (No) Progression Charts (No) Added Data (Yes) Revision to Table of Limits (No) Inspection Procedures (No) July 21/15 EAGP7-72-327 Page 4 ENGINE ALLIANCE, LLC PROPRIETARY InformaTION ### Page 5 (OCR) Ep Engine Allance Material Information Material - Cost and Availability 1. There is no kit provided to do this Service Bulletin. Industry Support Program Contact your customer support manager (CSM). The material data that follows is for each engine. Not applicable. Material Data for Each Spare Engine Not applicable. Reidentified Parts Not applicable. Necessary Tools No more Support Equipment is necessary. Other Material Information Data Part Number Nomenclature 382-127-801-6 HONEYCOMB CARTRIDGE - STAGE 5 July 21/15 EAGP7-72-327 Page 5 ENGINE ALLIANCE, LLC PROPRIETARY INFORMATION ### Page 6 (OCR) Engine Alliance Accomplishment Instructions General Removal and installation of the HPC stages 2-5 spool ([1], Figure 1) have not changed. Reference 2, Engine Manual, Chapter/Section, 72-35-20, DISASSEMBLY-03 and ASSEMBLY-02. A. Remove the subject HPC stages 2-5 spool ([1], Figure 1). B. Install a new or a serviceable HPC stages 2-5 spool [1] into the engine. Reference 2, Engine Manual, Chapter/Section, 72-35-20, ASSEMBLY-01 and ASSEMBLY-02. 2. Removal and installation of the stage 5 vane assemblies (12], Figure 1) with the new stage 5 honeycomb cartridges [3] PN 382-127-801-6 installed have not changed. Reference 2, Engine Manual, Chapter/Section 72-35-00, DISASSEMBLY-04 and ASSEMBLY-02 and Reference 3, CIR Manual, Chapter/Section, 72-35-03, REPAIR-03 and do as follows: A. Remove the stage 5 vane assemblies ([2], Figure 1) and replace the stage 5 honeycomb cartridges [3]. Reference 3, CIR Manual, Chapter/Section, 72-35-03, REPAIR-03. NOTE: All the stage 5 vane assemblies ([2], Figure 1), will need replacement of stage 5 honeycomb cartridges [3] installed. Install serviceable stage 5 vane assemblies [2] in the engine. Reference 2, Engine Manual, Chapter/Section, 72-35-00, ASSEMBLY-02. Notify the EA through Fleet Support that the affected HPC stages 2-5 spool ([1], Figure 1) has been removed: GE Aviation Fleet Support Toll Free Phone: 1-877-432-3272 Phone: (513) 552-3272 FAX: 1-877-432-3329 E-mail: aviation.fleetsupport@ge.com Website: http://geaviation.com/support/ A. Provide the HPC stages 2-5 spool ([1], Figure 1) part number, serial number, and part time and cycles since new (CSN). July 21/15 EAGP7-72-327 Page 6 ENGINE ALLIANCE, LLO PROPRIETARY INFORMATION G. hind ta the manistine an the cares an funt mana ### Page 7 (OCR) ER Engine Alliance NEWE FWD [3] SECTION A-A 1. STAGES 2-5 SPOOL 2. STAGE 5 VANE ASSEMBLY (QTY-10) 3. STAGE 5 HONEYCOMB CARTRIDGE (QTY-10) B525671 LOCATION OF THE STAGES 2-5 SPOOL FIGURE 1 July 21/15 EAGP7-72-327 ENGINE ALLIANCE, LLC PROPRIETARY INFORMATION Page 7 = cone a final aer ### Page 8 (OCR) EA Engine Alance Appendix Added Data Internal Reference Information Revision No. Reference Origination Document Original 378937-1 EAW July 21/15 EAGP7-72-327 Page 8 ENGINE ALLIANCE, LLC PROPRIETARY INFORMATION 4L:_-11 wishine - the are enfust sam. --- 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.