CFM International SB REV 72-0952: Revision 72, text

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb

CFM PROPRIETARY INFORMATION The information contained in this document is CFM proprietary information and is disclosed in con ﬁ- dence. It is the property of CFM and shall not be used, disclosed to others or reproduced without the express written consent of CFM, including, but wit hout limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modi ﬁcations, spare parts, design, or con ﬁguration 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 w hole or in part. The information contained in this document may also be controlled by U.S. export control laws. Unauthorized export or re-export is prohibited.

April 23, 2019 CFM56-5B S/B 72-0952 PAGE 1 of 22

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb

1. PLANNING INFORMATION A. Effectivity CFM56-5B1, -5B1/2P , -5B1/3, -5B1/P , -5B2, -5B2/2P , -5B2/3, -5B2/P , -5B3/2P , -5B3/2P1, -5B3/3, -5B3/3B1, -5B3/P , -5B3/P1, -5B4, -5B4/2P , -5B4/2P1, -5B4/3, -5B4/3B1, -5B4/P , -5B4/P1, -5B5, -5B5/3, -5B5/P , -5B6, -5B6/2P , -5B6/3, -5B6/P , -5B7, -5B7/3, -5B7/P , -5B8/3, -5B8/P , -5B9/2P , -5B9/3, -5B9/P The stationary high pressure turbine (HPT) inner stator seal (HPT inner stationary seal) P/N 1808M56G01 that has one of the serial numbers listed in T able 1 is affected by this Service Bulletin.

T able 1. Suspect HPT Inner Stationary Seals HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALF019DL 877-408 2012 ALF04DL4 890-317 2008 ALF04DL5 891-288 2012 ALF04DL9 890-371 2008 ALF06DL1 892-244 2010 ALF098DL 876-337 2012 ALF10DL7 891-300 2009 ALF124GT 892-676 2009 ALF12DL6 890-303 2010 ALF13DL2 890-425 2009 ALF13DL9 890-418 2009 ALF155DL 876-518 2009 ALF158DL 876-506 2011 ALF16DL6 890-324 2009 ALF175DL 876-538 2008 ALF178DL 889-130 2009 ALF1DL10 888-478 2012 ALF1DL12 889-479 2011 ALF1DL13 575-248 2011 ALF1DL61 889-860 2011 ALF1DL96 888-849 2011 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 2 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALF224DL 876-474 2012 ALF243DL 876-560 2012 ALF255DL 889-155 2011 ALF263DL 876-548 2009 ALF267DL 876-653 2010 ALF276DL 876-570 2010 ALF27DL3 892-212 2011 ALF2DL16 888-585 2009 ALF2DL27 888-592 2009 ALF2DL55 888-606 2008 ALF2DL76 889-697 2007 ALF30DL5 890-662 2008 ALF315DL 876-598 2012 ALF32DL4 890-457 2008 ALF32DL9 890-858 2009 ALF331DL 876-552 2010 ALF33DL2 890-436 2011 ALF343DL 876-639 2009 ALF36DL9 875-258 2012 ALF376DL 876-671 2008 ALF380DL 888-125 2008 ALF391DL 876-693 2009 ALF3DL17 888-636 2012 ALF3DL18 888-635 2011 ALF3DL20 889-677 2008 ALF3DL45 888-651 2012 ALF3DL48 888-821 2011 ALF3DL67 888-717 2012 ALF3DL80 888-711 2012 ALF3GT34 697-137 2012 ALF3GT40 892-118 2008 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 3 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALF410DL 877-164 2011 ALF420DL 874-120 2009 ALF42DL0 890-670 2007 ALF42DL5 891-538 2012 ALF43DL3 890-516 2011 ALF446DL 888-128 2008 ALF44DL1 890-535 2009 ALF46DL4 874-368 2010 ALF48DL6 890-668 2010 ALF49DL5 890-700 2009 ALF4DL10 890-523 2010 ALF4DL35 888-748 2012 ALF4DL52 575-356 2011 ALF4DL70 888-827 2012 ALF4DL87 888-806 2011 ALF50DL4 890-669 2007 ALF53DL0 890-901 2012 ALF53DL8 890-587 2010 ALF548DL 889-219 2012 ALF5DL41 888-866 2012 ALF5DL71 888-892 2010 ALF5DL75 888-850 2012 ALF5DL79 889-751 2011 ALF5DL84 874-209 2011 ALF60DL3 890-749 2009 ALF61DL2 890-783 2009 ALF62DL5 890-748 2012 ALF63DL6 890-656 2007 ALF65DL9 890-639 2009 ALF66DL7 891-647 2010 ALF6DL25 894-454 2011 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 4 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALF6DL96 876-689 2008 ALF6DL99 888-918 2012 ALF709DL 888-233 2012 ALF70DL4 890-692 2011 ALF70DL6 890-708 2012 ALF73DL8 890-684 2010 ALF745DL 888-269 2007 ALF746DL 888-284 2011 ALF74DL2 891-305 2009 ALF762DL 888-417 2012 ALF78DL9 890-848 2010 ALF7DL15 575-476 2011 ALF81DL7 891-794 2009 ALF826DL 889-432 2008 ALF836DL 888-400 2009 ALF83DL4 890-733 2010 ALF87DL8 890-810 2009 ALF89DL3 891-539 2009 ALF8DL07 890-110 2009 ALF8DL14 575-477 2012 ALF8DL16 575-469 2012 ALF8DL38 575-470 2012 ALF90DL6 876-544 2009 ALF90DL8 891-859 2007 ALF915DL 888-440 2009 ALF91DL4 890-853 2009 ALF91DL7 890-860 2012 ALF934DL 888-390 2010 ALF943DL 888-447 2008 ALF961DL 888-562 2012 ALF965DL 888-543 2009 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 5 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALF983DL 575-249 2011 ALF986DL 888-441 2010 ALF987DL 890-179 2011 ALF990DL 888-477 2009 ALF991DL 889-536 2009 ALF9DL62 890-202 2007 ALF9DL81 875-134 2011 ALF9DL84 891-273 2010 ALF9DL90 890-339 2008 ALF9DL98 890-222 2010 ALFDL085 890-504 2011 ALFDL140 874-390 2011 ALFDL143 874-374 2009 ALFDL149 874-388 2009 ALFDL152 875-613 2009 ALFDL165 875-398 2012 ALFDL180 874-526 2009 ALFDL230 875-578 2010 ALFDL245 874-628 2010 ALFDL337 874-564 2012 ALFDL355 875-612 2009 ALFDL365 874-285 2011 ALFDL383 890-734 2008 ALFDL418 889-170 2010 ALFDL439 890-986 2009 ALFDL455 874-219 2010 ALFDL479 875-795 2011 ALFDL537 877-511 2012 ALFDL544 874-721 2009 ALFDL546 874-819 2012 ALFDL549 894-750 2012 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 6 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALFDL551 874-870 2009 ALFDL554 876-460 2010 ALFDL577 874-928 2009 ALFDL578 874-803 2010 ALFDL593 874-773 2012 ALFDL597 874-760 2010 ALFDL603 875-915 2012 ALFDL628 874-850 2009 ALFDL641 875-838 2010 ALFDL654 875-861 2010 ALFDL657 874-877 2009 ALFDL665 877-152 2012 ALFDL688 875-862 2011 ALFDL689 876-461 2012 ALFDL693 874-869 2011 ALFDL699 874-829 2012 ALFDL707 874-863 2009 ALFDL721 779-658 2010 ALFDL726 876-144 2012 ALFDL736 874-913 2006 ALFDL747 874-918 2011 ALFDL793 876-109 2012 ALFDL828 876-181 2009 ALFDL864 877-257 2011 ALFDL885 890-806 2012 ALFDL891 876-243 2012 ALFDL911 876-239 2009 ALFDL978 876-253 2011 ALFDL981 779-731 2009 ALFG7503 893-353 2009 ALFGT030 890-925 2010 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 7 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALFGT096 876-312 2011 ALFGT120 890-937 2010 ALFGT128 890-970 2008 ALFGT174 893-194 2008 ALFGT293 893-164 2009 ALFGT332 890-743 2011 ALFGT386 892-243 2008 ALFGT410 888-908 2011 ALFGT570 893-342 2009 ALFGT572 893-341 2011 ALFGT581 892-358 2010 ALFGT601 892-356 2009 ALFGT608 892-381 2010 ALFGT767 892-477 2006 ALFJW093 803-811 2009 ALFKK208 874-102 2009 ALFKK264 874-112 2011 ALFKK412 890-458 2009 ALFKK451 874-127 2011 ALFKK471 874-352 2009 ALFKK556 875-942 2012 ALFKK558 875-175 2012 ALFKK596 874-422 2009 ALFKK602 875-340 2011 ALFKK614 875-199 2012 ALFKK642 874-217 2011 ALFKK644 874-212 2012 ALFKK668 888-901 2012 ALFKK686 874-435 2010 ALFKK696 875-245 2012 ALFKK725 890-592 2012 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 8 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALFKK727 875-334 2011 ALFKK737 875-287 2012 ALFKK738 874-268 2009 ALFKK757 875-310 2012 ALFKK772 874-286 2009 ALFKK824 874-336 2009 ALFKK828 875-344 2009 ALFKK904 874-460 2010 ALFKK915 888-883 2012 ALFKK950 875-527 2010 ALFKK990 875-586 2011 ALFKL025 877-153 2012 ALFKL047 874-643 2009 ALFKL109 874-736 2009 ALFKL130 874-792 2009 ALFKL134 875-802 2010 ALFKL136 875-785 2010 ALFKL140 875-796 2012 ALFKL147 875-904 2012 ALFKL160 874-901 2009 ALFKL202 874-924 2010 ALFKL212 874-969 2011 ALFKL233 874-940 2010 ALFKL270 874-955 2010 ALFKL304 876-105 2009 ALFKL326 890-844 2009 ALFKL346 876-148 2009 ALFKL348 876-135 2010 ALFKL363 876-203 2009 ALFKL383 876-194 2012 ALFKL421 888-708 2012 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 9 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair ALFKL437 877-422 2012 ALFKL445 877-587 2011 ALFKL481 876-467 2011 ALFKL488 890-737 2006 ALFKL511 575-199 2009 ALFKL540 876-420 2012 ALFKL548 876-448 2010 ALFKL558 874-389 2009 ALFKL563 876-468 2009 ALFKL589 876-495 2009 ALFKL604 876-502 2010 ALFKL609 876-501 2009 ALFKL615 875-220 2009 ALFKL628 876-494 2011 ALFNB126 895-953 2011 ALFPB985 802-195 2010 TRIT1077 877-695 2008 TRIT1079 779-873 2009 TRIT1108 876-623 2011 TRIT1115 876-652 2010 TRIT1126 888-604 2012 TRIT1161 876-649 2009 TRIT1262 876-662 2012 TRIT1266 779-894 2011 TRIT1269 876-687 2012 TRIT1453 888-436 2009 TRIT3209 888-531 2009 TRIT3210 575-252 2010 TRIT3252 888-446 2010 TRIT3262 875-476 2012 TRIT3590 874-227 2009 April 23, 2019 CFM56-5B S/B 72-0952 PAGE 10 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) Year of Honeycomb Repair TRIT3627 888-183 2010 TRIT3872 888-567 2011 TRIT3886 889-598 2012 TRIT3920 888-560 2009 TRIT3930 888-589 2008 TRIT3932 888-605 2010 TRIT3939 888-559 2008 TRIT4633 875-186 2009 TRIT4947 888-760 2011 TRIT4959 888-753 2011 TRIT5067 888-756 2011 TRIT5636 890-838 2008 TRIT5645 890-886 2009 TRIT5723 890-400 2008 TRIT6637 890-707 2011 These serial numbers are the best available data.

NOTE: The ESNs listed in T able 1 are the last known location for a given HPT inner stationary seal. This information is intended to help determine the current location of the HPT inner stationary seal.

B. Description This Service Bulletin provides actions needed on the affected HPT inner stationary seal with its serial number listed in T able 1 of paragraph 1.A., E ffectivity.

C. Compliance Category 3 CFM recommends that you do this Service Bulletin at the next shop visit of the engine/module.

Impact A This recommendation is to address a condition that may affect Flight Safety.

NOTE: This Service Bulletin can be accomplished in shop.

April 23, 2019 CFM56-5B S/B 72-0952 PAGE 11 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb This Service Bulletin is offered to improve the reliability or performance of your CFM 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 CFM in evaluating future product performance issues that may arise in the operator’s ﬂeet.

D. Concurrent Requirements None.

E. Reason

(1) Objective:

T o repair the HPT inner stationary seal that may have a condition that could affect ﬂight safety.

(2) Condition:

The affected HPT inner stationary seal may have a condition, generated during a ﬁeld replacement of honeycomb, which could lead to a localized separation of the replaced honeycomb. Separated honeycomb could affect the life of the rotating air HPT front seal.

(3) Cause:

The affected HPT inner stationary seals, at the time of the honeycomb replacement, may not have received the correct braze heat treat cycle speciﬁed in the repair.

(4) Improvement:

The braze condition on the HPT inner stationary seal honeycomb will no longer be suspect if the honeycomb is replaced again after the date listed in T able 1 of paragraph 1.A., E ffectivity.

(5) Substantiation:

Substantiation is by analysis and ﬂeet experience.

F. Approval The technical content of this Service Bulletin is approved by the FAA and under the Authority of DOA No. EASA.21J.086.

G. Manpower No additional man-hours are required to comply with this Service Bulletin.

H. Weight and Balance Weight and balance are not changed.

April 23, 2019 CFM56-5B S/B 72-0952 PAGE 12 CFM Desi gnated: - CONFIDENTIAL Subject to the restrictions on the media

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