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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 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 1 of 23
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb
TRANSMITTAL INFORMATION REVISION 2 TO SERVICE BULLETIN 72-1054 Revision 2 is issued to update paragraphs 1., P LANNING INFORMATION,2 . ,M ATERIAL INFORMATION, and 3., A CCOMPLISHMENT INSTRUCTIONS.
Revision 1 was issued January 15, 2020. The original was issued April 23, 2019. Revision bars in the left margin identify changes.
1. PLANNING INFORMATION A. Effectivity CFM56-7B20, -7B20/2, -7B20/3, -7B20E, -7B22, -7B22/2, -7B22/3, -7B22/3B1, -7B22/B1, -7B22E, -7B22E/B1, -7B24, -7B24/2, -7B24/3, -7B24/3B1, -7B24/B1, -7B24E, -7B24E/B1 CFM56-7B26, -7B26/2, -7B26/3, -7B26/3B1, -7B26/3B2, -7B26/3B2F , -7B26/3F , -7B26/B1, -7B26/B2, -7B26E, -7B26E/B1, -7B26E/B2, -7B26E/B2F , -7B26E/F , -7B27, -7B27/2 CFM56-7B27/3, -7B27/3B1, -7B27/3B1F , -7B27/3B3, -7B27/3F , -7B27/B1, -7B27/B3, -7B27A, -7B27A/3, -7B27AE, -7B27E, -7B27E/B1, -7B27E/B1F , -7B27E/B3, -7B27E/F 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) ALF019DL 877408 ALF04DL4 890317 ALF04DL5 891288 ALF04DL9 890371 ALF06DL1 892244 ALF098DL 876337 ALF10DL7 891300 ALF124GT 892676 ALF12DL6 890303 ALF13DL2 890425 ALF13DL9 890418 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 2 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALF155DL 876518 ALF158DL 876506 ALF16DL6 890324 ALF175DL 876538 ALF178DL 889130 ALF1DL10 888478 ALF1DL12 889479 ALF1DL13 575248 ALF1DL61 889860 ALF1DL96 888849 ALF224DL 876474 ALF243DL 876560 ALF255DL 889155 ALF263DL 876548 ALF267DL 876653 ALF276DL 876570 ALF27DL3 892212 ALF2DL16 888585 ALF2DL27 888592 ALF2DL55 888606 ALF2DL76 889697 ALF30DL5 890662 ALF315DL 876598 ALF32DL4 890457 ALF32DL9 890858 ALF331DL 876552 ALF33DL2 890436 ALF343DL 876639 ALF36DL9 875258 ALF376DL 876671 ALF380DL 888125 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 3 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALF391DL 876693 ALF3DL17 888636 ALF3DL18 888635 ALF3DL20 889677 ALF3DL45 888651 ALF3DL48 888821 ALF3DL67 888717 ALF3DL80 888711 ALF3GT34 697137 ALF3GT40 892118 ALF410DL 877164 ALF420DL 874120 ALF42DL0 890670 ALF42DL5 891538 ALF43DL3 890516 ALF446DL 888128 ALF44DL1 890535 ALF46DL4 874368 ALF48DL6 890668 ALF49DL5 890700 ALF4DL10 890523 ALF4DL35 888748 ALF4DL52 575356 ALF4DL70 888827 ALF4DL87 888806 ALF50DL4 890669 ALF53DL0 890901 ALF53DL8 890587 ALF548DL 889219 ALF5DL41 888866 ALF5DL71 888892 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 4 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALF5DL75 888850 ALF5DL79 889751 ALF5DL84 874209 ALF60DL3 890749 ALF61DL2 890783 ALF62DL5 890748 ALF63DL6 890656 ALF65DL9 890639 ALF66DL7 891647 ALF6DL25 894454 ALF6DL96 876689 ALF6DL99 888918 ALF709DL 888233 ALF70DL4 890692 ALF70DL6 890708 ALF73DL8 890684 ALF745DL 888269 ALF746DL 888284 ALF74DL2 891305 ALF762DL 888417 ALF78DL9 890848 ALF7DL15 575476 ALF81DL7 891794 ALF826DL 889432 ALF836DL 888400 ALF83DL4 890733 ALF87DL8 890810 ALF89DL3 891539 ALF8DL07 890110 ALF8DL14 575477 ALF8DL16 575469 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 5 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALF8DL38 575470 ALF90DL6 876544 ALF90DL8 891859 ALF915DL 888440 ALF91DL4 890853 ALF91DL7 890860 ALF934DL 888390 ALF943DL 888447 ALF961DL 888562 ALF965DL 888543 ALF983DL 575249 ALF986DL 888441 ALF987DL 890179 ALF990DL 888477 ALF991DL 889536 ALF9DL62 890202 ALF9DL81 875134 ALF9DL84 891273 ALF9DL90 890339 ALF9DL98 890222 ALFDL085 890504 ALFDL140 874390 ALFDL143 874374 ALFDL149 874388 ALFDL152 875613 ALFDL165 875398 ALFDL180 874526 ALFDL230 875578 ALFDL245 874628 ALFDL337 874564 ALFDL355 875612 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 6 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALFDL365 874285 ALFDL383 890734 ALFDL418 889170 ALFDL439 890986 ALFDL455 874219 ALFDL479 875795 ALFDL537 877511 ALFDL544 874721 ALFDL546 874819 ALFDL549 894750 ALFDL551 874870 ALFDL554 876460 ALFDL577 874928 ALFDL578 874803 ALFDL593 874773 ALFDL597 874760 ALFDL603 875915 ALFDL628 874850 ALFDL641 875838 ALFDL654 875861 ALFDL657 874877 ALFDL665 877152 ALFDL688 875862 ALFDL689 876461 ALFDL693 874869 ALFDL699 874829 ALFDL707 874863 ALFDL721 779658 ALFDL726 876144 ALFDL736 874913 ALFDL747 874918 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 7 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALFDL793 876109 ALFDL828 876181 ALFDL864 877257 ALFDL885 890806 ALFDL891 876243 ALFDL911 876239 ALFDL978 876253 ALFDL981 779731 ALFG7503 893353 ALFGT030 890925 ALFGT096 876312 ALFGT120 890937 ALFGT128 890970 ALFGT174 893194 ALFGT293 893164 ALFGT332 890743 ALFGT386 892243 ALFGT410 888908 ALFGT570 893342 ALFGT572 893341 ALFGT581 892358 ALFGT601 892356 ALFGT608 892381 ALFGT767 892477 ALFJW093 803811 ALFKK208 874102 ALFKK264 874112 ALFKK412 890458 ALFKK451 874127 ALFKK471 874352 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 8 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALFKK556 875942 ALFKK558 875175 ALFKK596 874422 ALFKK602 875340 ALFKK614 875199 ALFKK642 874217 ALFKK644 874212 ALFKK668 888901 ALFKK686 874435 ALFKK696 875245 ALFKK725 890592 ALFKK727 875334 ALFKK737 875287 ALFKK738 874268 ALFKK757 875310 ALFKK772 874286 ALFKK824 874336 ALFKK828 875344 ALFKK904 874460 ALFKK915 888883 ALFKK950 875527 ALFKK990 875586 ALFKL025 877153 ALFKL047 874643 ALFKL109 874736 ALFKL130 874792 ALFKL134 875802 ALFKL136 875785 ALFKL140 875796 ALFKL147 875904 ALFKL160 874901 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 9 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) ALFKL202 874924 ALFKL212 874969 ALFKL233 874940 ALFKL270 874955 ALFKL304 876105 ALFKL326 890844 ALFKL346 876148 ALFKL348 876135 ALFKL363 876203 ALFKL383 876194 ALFKL421 888708 ALFKL437 877422 ALFKL445 877587 ALFKL481 876467 ALFKL488 890737 ALFKL511 575199 ALFKL540 876420 ALFKL548 876448 ALFKL558 874389 ALFKL563 876468 ALFKL589 876495 ALFKL604 876502 ALFKL609 876501 ALFKL615 875220 ALFKL628 876494 ALFNB126 895953 ALFPB985 802195 TRIT1077 877695 TRIT1079 779873 TRIT1108 876623 TRIT1115 876652 April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 10 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb HPT Inner Stationary Seal Serial Number Engine Serial Number (ESN) TRIT1126 888604 TRIT1161 876649 TRIT1262 876662 TRIT1266 779894 TRIT1269 876687 TRIT1453 888436 TRIT3209 888531 TRIT3210 575252 TRIT3252 888446 TRIT3262 875476 TRIT3590 874227 TRIT3627 888183 TRIT3872 888567 TRIT3886 889598 TRIT3920 888560 TRIT3930 888589 TRIT3932 888605 TRIT3939 888559 TRIT4633 875186 TRIT4947 888760 TRIT4959 888753 TRIT5067 888756 TRIT5636 890838 TRIT5645 890886 TRIT5723 890400 TRIT6637 890707 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.
April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 11 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media
ENGINE - Combustion Assembly (72-41-00) - Repair of HPT Inner Stationary Seal Honeycomb 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 as follows:
The following quick turn shop visit type is exempt from compliance to this Service Bulletin:
- The removal of a disk, hub, or spool for purposes other than LLP expiration, and which does not require the separation of a major module flange.
Impact A This recommendation is to address a condition that may affect Flight Safety.
NOTE 1: This Service Bulletin can be accomplished in shop.
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 decisi on will be taken into consideration by CFM in evaluating future product performance issues that may arise in the operator’s fleet.
NOTE 2: Some steps in paragraph 3., A CCOMPLISHMENT INSTRUCTIONS are identified as Required for Compliance (RC). If this Service Bulletin is mandated by an Airworthiness Dir ective (AD), the steps identi fied as RC must be done to comply with the AD. Steps not identi fied with RC are recommended and may be deviated from; done as a part of other actions; or done with accepted methods different from those given in the Service Bulletin if the RC steps can be done and the airplane returned to a serviceable condition.
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.
April 23, 2019 CFM56-7B S/B 72-1054 Revision 02, August 10, 2022 PAGE 12 CFM Des ignated: - CONFIDENTIAL Subject to the restrictions on the media