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CF6-80C2 Boeing Service Bulletins (SBs) SB 72-1631 R00 ENGINE - Engine Assembly (72-00-00) - MCD Field Inspection Recommendation Date Printed:
2023/08/29 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 4 CF6-80C2 SERVICE BULLETIN - 72-1631 R00 Revised:08/25/2023 SB 72-1631 R00 ENGINE - ENGINE ASSEMBLY (72-00-00) - MCD FIELD
INSPECTION RECOMMENDATION Issued:
08/25/2023 GE Designated: -CONFIDENTIAL- 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 part.
This technical data is considered subject to the Export Administration Regulations (EAR) pursuant to 15 CFR Parts 730-774. Transfer of this data by any means to a Non-U.S. 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 (2023) General Electric Company, U.S.A.
1. PLANNING INFORMATION A. Effectivity * * * CF6-80C2B1F/B2F/B4F/B5F/B6F/B7F/K1F This Service Bulletin is applicable to these CF6-80C2 engines:
*CF6-80C2 engines, serial numbers 630-136 through 630-156 and 707-510 through 707-645 which accumulated less than 400 engine cycles since new (ECSN).
These serial numbers are the best available data.
B. Description This Service Bulletin provides a reduced interval on-wing master chip detector (MCD) inspection for engines with serial numbers 630-136 through 630-156 and 707-510 through 707-645.
C. Compliance Category 2 GE recommends that you do this Service Bulletin as soon as possible without effect on revenue service but using the following criteria:
(1) For engines that have accumulated less than 400 ECSN, do the first MCD inspection as soon as possible without effect on revenue service but within 15 engine flight cycles (EFC) from verbal communication or the issue date of this Service Bulletin and subsequently.
(2) For engines that have accumulated less than 100 ECSN, do an MCD inspection every 25 EFC until accumulation of 100 ECSN.
(3) For engines that have accumulated 100 ECSN or more, but less than 200 ECSN, do an MCD inspection every 50 EFC until the accumulation of 200 ECSN.
(4) For engines that have accumulated 200 ECSN or more, but less than 400 ECSN, do an MCD inspection every 100 EFC until the accumulation of 400 ECSN.
(5) For engines that have accumulated 400 ECSN or more, refer to the applicable standard AMM MCD inspection procedure and standard inspection interval. No further reduced MCD inspection is necessary.
Impact A This recommendation is to address a condition that may affect Flight Safety.
NOTE:This Service Bulletin can be done on wing.
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
CF6-80C2 Boeing Service Bulletins (SBs) SB 72-1631 R00 ENGINE - Engine Assembly (72-00-00) - MCD Field Inspection Recommendation Date Printed:
2023/08/29 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 4 evaluating future product performance issues that may arise in the operator's fleet.
D. Concurrent Requirements None.
E. Reason
(1) Objective:
To provide reduced interval on-wing MCD inspections for engines identified in paragraph
1.A., prior to the first scheduled AMM MCD inspection check.Effectivity
(2) Condition:
Premature bearing failures are known root causes, which can lead to operational events.
(3) Cause:
Historical field findings show that impending bearing failures may produce metallic chips which can be detected with more frequent inspections to reduce operational events.
(4) Inspection:
Reduced MCD inspection intervals can help operators manage engine reliability by increasing detection of premature bearing distress and abate operational events.
(5) Substantiation:
Substantiation is by the fleet experience and comparative analysis to the historical field events. Reduced MCD inspection intervals improve identification of premature bearing distress.
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 MCD, you will need approximately 1.0 man-hour for each engine.
H. Weight and Balance Weight and balance are not changed.
I. References (Use the latest version of these documents) Boeing 747-400 Aircraft Maintenance Manual (AMM) Boeing 767-300 Aircraft Maintenance Manual (AMM) Boeing 767-400 Aircraft Maintenance Manual (AMM) GEK 92452-4, CF6-80C2B (FADEC) Illustrated Parts Catalog (IPC) GEK 112722, CF6-80C2K1F Illustrated Parts Catalog (IPC) Kawasaki Aircraft Maintenance Manual (AMM) C-2 Job Guides J. Publications Affected None.
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 CF6-80C2B1F/B2F/B4F/B5F/B6F/B7F:
J221P012 (1) Packing, Preformed Quote (-) -- M83248-1-012* (ALT) Packing, Preformed NP (-) -- M83248-2-012* (ALT) Packing, Preformed NP (-) -- NAS1593-012* (ALT) Packing, Preformed NP (-) -- CF6-80C2K1F:
M83248-1-012* (1) Seal, O-Ring Probe NP (-) -- *Part not supplied by GE Engine Services Distribution L.L.C. Procure through local purchase.
NP = Not Provisioned NOTE:Prices are found in the GE Materials Catalog.
(3) Consumables:
None.
CF6-80C2 Boeing Service Bulletins (SBs) SB 72-1631 R00 ENGINE - Engine Assembly (72-00-00) - MCD Field Inspection Recommendation Date Printed:
2023/08/29 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 4 B. Industry Support Information None.
C. Configuration Chart None.
D. Parts Disposition None.
E. Tooling - Price and Availability None.
3. ACCOMPLISHMENT INSTRUCTIONS A. General
(1) Do an inspection of the MCD as follows:
(a) Remove the MCD probe. Refer to the applicable Boeing 747-400 AMM, Boeing 767-300 AMM, Boeing 767-400 AMM, or Kawasaki AMM C-2 Job Guides.
(b) Do a visual inspection of the MCD for debris and make an analysis as specified in the applicable AMM limits with the difference that follows:
1 If particles cover more than 10 percent of the MCD probe tip, send material for material composition analysis and report finding and results to GE Aviation prior to next flight. Refer to and NOTE below. Send the MCD and scavengeFigure 1 screens inspection results to the GE Aviation Fleet Support, aviation.fleetsupport@ge.com. Include this Service Bulletin number in report.
NOTE:Figure 1 provides examples of the MCD probe tips with debris. GE considers probes No. 3, 4, and 5 as probes with more than a 10 percent of the tip coverage.
(c) Install the MCD probe again. Refer to the applicable Boeing 747-400 AMM, Boeing 767-300 AMM, Boeing 767-400 AMM, or Kawasaki AMM C-2 Job Guides.
(d) If debris is within the limits specified in step 3.A.(1)(b), do as follows:
1 Do step 3.A.(1) again within the number of EFC specified in paragraph 1.C., .Compliance
CF6-80C2 Boeing Service Bulletins (SBs) SB 72-1631 ROO ENGINE - Engine Assembly (72-00-00) - MCD Field Inspection Recommendation 2 3 6042978-00 Magnetic Sensor Quantification Figure l GE Designated: - CONFIDENTIAL Subject to the restrictions on the media PROPRIETARY INFORMATION - Not to be used, disclosed to others or Date Printed: reproduced without the express written consent of GE. Technical data Page 2023/08/29 considered ITAR and/or EAR controlled; transfer of this data to a Non-US 4 Of 4 Person, without USG authorization, is strictly prohibited.