ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One CFM PROPRIETARY INFORMATION The information contained in this document is CFM proprietary information and is disclosed incondence. 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 without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modications, spare parts,design, or conguration 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 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. 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 CFM and that have been maintained in accordance with CFM technical documentation and recommendations. CFM has no contractual or legal obligation for, nor knowledge of, non-CFM-approved parts and repairs. Accordingly, this document is not intended to apply to non-CFM-approved parts and repairs.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 1 of 46ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One 1. P LA N N I N G I N F O R M A T I O N
A. Ef fe cti v i ty CFM56-3, -3B, -3C (1) The old Accessory Gearbox assembly (AGB) 335-300-110-0 and its old components (Refer to paragraph 2.C. C O N F I G U RA T I O N C H A RT ) installed on CFM56-3 engines or stocked as spares are affected. (2) The new Accessory Gearbox assembly 335-300-112-0 and its new components (Refer to paragraph 2.C. C O N F I G U RA T I O N C H A RT ) will be introduced as spare parts. N O T E : There is no CFM56-3 engine in production line anymore.
B. D e s cri pt i o n This Service Bulletin announces the spare parts availability of the following: - A new Accessory Gearbox assembly 335-300-112-0 equipped with a new handcranking line oil seal assy 335-317-805-0, a new handcranking cover assy 335-322-806-0 and a new starter drive pad assy 335-300-807-0. Refer to gure 1, gure 2 and gure 3. - For the details of new starter drive pad assy 335-300-807-0, refer to paragraph 2.C. C O N F I G U RA T I O N C H A RT and gure 4. This Service Bulletin provides also the accomplis hment instructions to rework and reidentify the old AGB 335-300-110-0 to the new AGB 335-300-112-0. C. C o m p l i a n ce Category 3 Do at next engine shop visit opportunity.
N O T E : This Service Bulletin can be accomplished in shop.
D. C o n c u rre n t Re q u i re m e n ts None.
E. Re as o n (1) Objective:

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 2ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One INTRODUCTION OF NEW PARTS. To improve the reliability. (2) Condition: Some cases of engine oil loss have been reported and resulted in IFSD (In Flight Shut Down). (3) Cause: Ground investigations showed that the AGB handcranking cover assy was not installed or incorrectly installed. (4) Improvement:Modication of the AGB by the introduction of a new oil seal assy on the new starter drive pad assy and a new handcranking cover assy to prevent oil leakage from handcranking pad. (5) Substantiation: Substantiation is by testing and comparative analysis.
F. Ap p rova l The technical content of this document is approved by the FAA and under the authority of DOA n° EASA.21J.086. G. M a n powe r You will need approximately 4 man-hours to replace the old starter drive pad assy by the new one on the AGB.
H. We i g h t a n d B a l a n ce Accomplishment of this Service Bulletin w ill result in a weight increase of 0.227 lb (0,103 kg).
I. Refe re n ces CFM56-3 Illustrated Parts Catalog, CFMI-TP.PC.8 CFM56-3 Engine Shop Manual, CFMI-TP.SM.5 CFM56 Standard Practices Manual, CFMI-TP.SP.2 CFM56 Consumable Products Manual, CFMI-TP.CP.3

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 3ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One CFM56 Illustrated Tool and Equipment Manual, CFMI-TP.TE.10 CFM56-3 S/B 72-0155 ENGINE - Accessory Gearbox - Deletion of the Sealol Seal Assy Installed on the Handcranking Bearing Housing BOEING 737-300/400/500 Aircraft Maintenance Manual
N O T E : The reference documents listed below are for the engine manufacturer's internal use only: AAS : 27828 CAD: MOD095001 AAS : 27160 CAD: MOD051442
J. P u b l i cati o n s Af fe cted CFM56-3 Illustrated Parts Catalog, CFMI-TP.PC.8, ATA 72-63-00 CFM56-3 Engine Shop Manual, CFMI-TP.SM.5, ATA 72-63-00 CFM56 Illustrated Tool and Equipment Manual, CFMI-TP.TE.10 BOEING 737-300/400/500 Aircraft Maintenance Manual
K. I n te rc h a n g e a b i l i ty The physical interchangeability of the AGB assembly is affected by the introduction of a new starter drive pad assy with a new oil seal assy. The functional interchangeability of the AGB assembly is not affected. The new starter drive pad assy with a new oi l seal assy is interchangeable only as a set with the old starter drive pad assy. The new handcranking cover assy is not interchangeable with the old one. The old and new parts can not be mixed.
L. S of twa re Acco m p l i s h m e n t S u m m a ry None. 2. M A T E R I A L I N F O R MA T I O N
A. M ate ri a l

- P ri ce a n d A va i l a b i l i ty (1) Parts necessary to do this Service Bulletin:

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 4ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

P a rt N u m b e r Qty/ E n g P a rt N a m e Unit $ P ri ce Pkg Qty Lead Time D ays 333-089-185-000 (1) Logistic Kit 10,170.00 (1) Quote .335-300-807-0 (1) Pad Assy- Starter Drive 6,600.00 (1) 7
.335-322-806-0 (1) Cover AssyHandcranking 1,250.00 (1) 7
.335-317-805-0 (1) Seal Assy - Oil 2,320.00 (1) 30 649-393-163-0 (1) Preformed Packing O-Ring 16.75 (10) 30
J221P163 (Alt) Preformed Packing O-Ring 14.00 (10) 7
649-393-158-0 (1) Preformed Packing O-Ring 12.25 (25) 30
J221P158 (Alt) Preformed Packing O-Ring 7.00 (25) 5
649-393-153-0 (1) Preformed Packing O-Ring - (-)

-
J221P153 (Alt) Preformed Packing O-Ring 5.00 (25) 10
J626P03 (3) Nut - Self Locking 3.10 (25) 10 649-310-003-0 (Alt) Nut - Self Locking

- (-)

- 649-341-010-0 (3) Washer - Plate 3.80 (50) 7 649-393-032-0 (1) Preformed Packing O-Ring - (-)

-
J221P032 (Alt) Preformed Packing O-Ring 2.25 (25) 10
649-393-013-0 (2) Preformed Packing O-Ring 0.65 (100) 30
J221P013 (Alt) Preformed Packing O-Ring 0.57 (25) 10
649-393-114-0 (1) Preformed Packing O-Ring - (-)

-
J221P114 (Alt) Preformed Packing O-Ring 0.65 (100) 5

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 5ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One N O T E 1 : Prices can change.
N O T E 2 : This kit 333-089-185-000 is added only to facilitate the spare parts ordering process, but each par t can be also purchased separately. (2) Other Spare Parts:

P a rt N u m b e r Qty/ E n g P a rt N a m e Unit $ P ri ce Pkg Qty Lead Time D ays 335-300-112-0 (1) Gearbox Assy - Accessory Quote (-) Quote

N O T E : Prices can change. (3) Consumables: C o d e N u m b e r D e s c ri pti o n CP1039 Acetone CP2101 Graphite Compound CP2442 Engine Oil CP5069 Calibration Fluid CP5070 Vaseline
B. I n d u st ry S u p p o rt I n f o rm ati o n Parts : CFM will provide a 50% back-end di scount on the logistic kit 333-089-185-000. Refer to paragraph 2.A. Material - Price and Availability. Labor : CFM will support the 4 manhours necessary to rework the old AGB to the new one. All warranty claims for credit request on the logistic kit and the labor must be submitted within one year of compliance and by December 31, 2016. Send a Warranty Claim with the number of this Service Bulletin to CFM through your routine channel or to :

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 6ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Europe, Middle East, and Africa Region Customers CFM SA Customers CFM Customer Support Operation Attn : Warranty and Guarantee Manager c/o Snecma - Site de Melun - Montereau Aerodrome de Villaroche - BP 1936 77019 Melun Cedex - France Tel : 33 (0) 1 64.14.85.72 Fax : 33 (0) 1 64.14.87.65 North and South America and Asia Customers CFM Inc. Customers CFM International Inc. Attn : Manager Warranty Administration One Neumann Way - Room 444 Cincinnati, OH 45215-1988 USA Tel : 1 513 552 2000 Fax : 1 513 552 5081

C. C o n g u rati o n C h a rt

N ew P a rt N u m b e r Qty/ E n g P a rt N a m e Old Part Number/ I P C Lo cat i o n Qty/ E n g O P Chg/ Sprt C o d e 9325M80G01-G02-G03 -G04-G05 (X) Engine Assy 9325M80G01-G02-G03 -G04-G05 72-00-00-22-001 (X) RM -/-

9325M85G01-G02-G03 -G04 -G05 (X) Engine Assy 9325M85G01-G02-G03 -G04 -G05 72-00-00-22-001 (X) RM -/-

9325M90G01-G02-G03 (X) Engine Assy 9325M90G01-G02-G03 72-00-00-22-001 (X) RM -/-

. 335-300-112-0 (1) Gearbox Assy - Accessory .335-300-110-0 72-00-00-22-930 72-63-00-04-001 72-63-00-10-001 (1) SU/ RW/ RI 1/A

.. J626P04 (1) Nut- Self Locking ..J626P04 72-63-00-04-440 (1) RM -/-
.. 649-671-392-0 (Alt) Nut- Self Locking ..649-671-392-0 72-63-00-04-440 (Alt) RM -/-
.. 649-393-012-0 (1) Packing-Preformed O-Ring ..649-393-012-0 72-63-00-04-450 (1) RM -/-
.. J221P012 (Alt) Packing-Preformed O-Ring ..J221P012 72-63-00-04-450 (Alt) RM -/-
.. 649-393-013-0 (1) Packing-Preformed O-Ring ..649-393-013-0 72-63-00-04-460 (1) RM -/-

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 7ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

N ew P a rt N u m b e r Qty/ E n g P a rt N a m e Old Part Number/ I P C Lo cat i o n Qty/ E n g O P Chg/ Sprt C o d e .. J221P013 (Alt) Packing-Preformed O-Ring ..J221P013 72-63-00-04-460 (Alt) RM -/-
.. 335-310-300-0 (1) Nozzle - Oil ..335-310-300-0 72-63-00-04-470 (1) RM -/-

.. 335-300-807-0 (1) Pad Assy - Drive Starter ..335-300-803-0 72-63-00-04-480 see Note 4 (1) SU 5/A

... 300-300-904-0 (1) Pad - Drive Starter ...335-300-902-0 72-63-00-04-600 (1) SU 5/A
... 300-300-904-0 (-) Pad - Drive Starter ...335-300-903-0 72-63-00-04-600 (Alt) SU 5/A
... J1037P06 (1) Nipple ...J1037P06 72-63-00-04-590 (1) RM -/-
... 649-393-012-0 (1) Packing-Preformed O-Ring ...649-393-012-0 72-63-00-04-580 (1) RM -/-
... J221P012 (Alt) Packing-Preformed O-Ring ...J221P012 72-63-00-04-580 (Alt) RM -/-
... J970P06 (2) Insert - Screw Threaded ...J970P06B 72-63-00-04-570 (2) SU 5/E
... 649-079-401-0 (1) Stud - Locked In Key Locked ...649-079-401-0 72-63-00-04-560 (1) RM -/-
... 649-079-402-0 (3) Stud - Locked In Key Locked ...649-079-402-0 72-63-00-04-550 (3) RM -/-

- (-) Insert ...REA048SF (301-487-200-0) 72-63-00-04-540 (3) DE 5/E

... 301-487-002-0 (2) Pin-Centering ...301-487-002-0 72-63-00-04-520 (2) RM -/-
... J970P04 (5) Insert - Screw Threaded ...J970P04B 72-63-00-04-500 (5) SU 5/E ... SRK374L (8) Insert - Key Locked ...SRK374L 72-63-00-04-510 (8) RM -/-

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 8ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

N ew P a rt N u m b e r Qty/ E n g P a rt N a m e Old Part Number/ I P C Lo cat i o n Qty/ E n g O P Chg/ Sprt C o d e ... 649-079-400-0 (3) Stud - Locked In Key Locked - (-) AD 5/-
... 340-152-101-0 see Note 4 (5) Plug

- (-) AD 5/-

.. 335-310-200-0 (1) Spool ..335-310-200-0 72-63-00-10-240 (1) RM -/-
.. J221P114 (1) Packing-Preformed O-Ring ..J221P114 72-63-00-10-220 (1) RM -/-
.. 649-393-114-0 (Alt) Packing-Preformed O-Ring ..649-393-114-0 72-63-00-10-220 (Alt) RM -/-
.. J221P013 (2) Packing-Preformed O-Ring ..J221P013 72-63-00-10-230 (2) RM -/-
.. 649-393-013-0 (Alt) Packing-Preformed O-Ring ..649-393-013-0 72-63-00-10-230 (Alt) RM -/-

.. 335-322-806-0 (1) Cover-Assy ..335-322-802-0 72-63-00-04-242 (1) SU 5/A
... 335-309-605-0 see Note 4 (1) Cover ...335-309-604-0 72-63-00-04-244 (1) SU 5/-
... 335-322-902-0 see Note 4 (1) Cable ...335-322-901-0 72-63-00-04-246 (1) SU 5/-

- (-) Packing-Preformed O-Ring ..J221P134 72-63-00-04-235 (2) DE 5/-

- (-) Packing-Preformed O-Ring ..649-393-134-0 72-63-00-04-235 (Alt) DE 5/-

- (-) Packing-Preformed O-Ring ..AS3085-134 72-63-00-04-235 (Alt) DE 5/-

- (-) Packing-Preformed O-Ring ..M83248-1-134 72-63-00-04-235 (Alt) DE 5/-
.. 649-393-153-0 (1) Packing-Preformed O-Ring - (-) AD 5/-
.. 649-341-031-0 (5) Washer-at ..649-341-031-0 72-63-00-04-220 (5) RM -/-

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 9ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

N ew P a rt N u m b e r Qty/ E n g P a rt N a m e Old Part Number/ I P C Lo cat i o n Qty/ E n g O P Chg/ Sprt C o d e .. J644P11B (5) Bolt-Mach Dbl Hex Hd ..J644P11B 72-63-00-04-210 (5) RM -/-

.. 335-317-805-0 (1) Oil Seal - Assy

- (-) AD 5/- ... 335-324-301-0 (1) Packing-Preformed O-Ring - (-) AD 5/-
... 335-320-403-0 (1) Oil Seal - Subassy Matched Parts - (-) AD 5/-
.... 335-324-202-0 (1) Oil Seal

- (-) AD 5/- .... 335-317-702-0 (1) Ring - Mating

- (-) AD 5/- .. 649-393-032-0 (1) Packing-Preformed O-Ring - (-) AD 5/-
.. J221P032 (Alt) Packing-Preformed O-Ring - (-) AD 5/-
.. J626P03 (3) Nut - Self Locking

- (-) AD 5/- .. 649-341-010-0 (3) Washer - Flat

- (-) AD 5/-
N O T E 1 : Specication 2000 Change Codes - = Not applicable. 1 = One way interchangeable.5 = Qualied interchangeability - parts deleted.5 = Qualied interchangeability - parts added.5 = Qualied interchangeability - Refer to paragraph 1.K I n te rc h a n g e a b i l i ty

. N O T E 2 : Spare Parts Support Codes - = Not applicable. A = Old parts will no longer be supplied. E = Old parts will be supplied, and can be used at other engine locations.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 10ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One N O T E 3 : Operation Codes AD = Added DE = DeletedRI = Reidentied RM = Remains RW = Reworked SU = Superseded
N O T E 4 : This part is not procurable.
D. D i s p os i ti o n of P a rts Part Numbers 335-322-802-0 and 335-300-803-0 removed to accomplish this Service Bulletin may be locally scrapped.
E. T o o l i n g - P ri ce a n d A va i l a b i l i ty T

o o l N u m b e r D es cri pti o n
856A3545G03 Rigging Fixture 856A1130G01 Tool Set, Jackscrews 856A2971G02 Removal / Installation , Sealol and Magnetic Seals 856A2979G01 Tool Set , Target - AGB Oil Nozzle (Line N° 2) Air Impingement Check 856A3548G02 Tool Set , Targets - AGB Oil Nozzle Air Impingement Check 856A3549G02 Tool Set , Leak Test - AGB
3. AC C O M P L I S H M E N T I N S T R U CT I O N S
N O T E 1 : Changes introduced by this Service Bulletin have no effect on the removal/installation and disassembly/assembly of AGB assembly except for the impingement test of the oil nozzle.
N O T E 2 : Changes introduced by this Service Bulletin have no effect on the removal/installation and disassembly/assembly of starter drive pad assembly except for the installation of the new oil seal assy. CA U T I O N : TO PREVENT INJURY, INSTALL A PROTECTIVE COVER ON THE FREE END OF OLD CABLE 335-322-901-0 OF THE OLD HANDCRANKING COVER ASSY 335-322-802-0 WHEN YOU REMOVE THE FUEL SUPPLY TUBE ASSY 335-216-301-0 OR 335-216-302-0 FROM THE OLD AGB 335-300-110-0

.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 11ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One A. Removal of the old AGB assembly 335-300-110-0 equipped with its old starter drive pad assembly 335-300-803-0 and handcranking cover assembly 335-322-802-0 from the engine assembly. Refer to Engine Shop Manual (ESM), ATA 72-00-63, Removal 001.Refer to gure 1.
B. Removal of the old handcranking cover assembly 335-322-802-0 and starter drive pad assembly 335-300-803-0 from the old AGB assembly 335-300-110-0. Refer to Engine ShopManual (ESM), ATA 72-63-00, Disassembly 001. Refer to gure 2, gure 3 and gure 4.
N O T E : This step concerns the rework of old AGB assembly 335-300-110-0 to the new AGB assembly 335-300-112-0. (1) Remove the old handcranking cover assembly 335-322-802-0 from the old AGB assembly 335-300-110-0 as follows : (a) Remove the bolt J644P06A which attatch the old cable 335-322-901-0 of the old handcranking cover assy 335-322-802-0 on the AGB 335-300-110-0. (b) Remove the bolts J644P11B and washers 649-341-031-0 which attach the old handcranking cover assembly 335-322-802-0. (c) Remove the old handcranking cover assembly 335-322-802-0, use the P12 of the tool set - jackscrews, 856A1130G01. (d) Remove and discard the old handcranking cover assembly 335-322-802-0 and two O-rings J221P134 or 649-393-134-0 or AS3085-134 or M83248-1-134. (2) Remove the old starter drive pad assembly 335-300-803-0 with the handcranking 62 tooth gearshaft assembly 335-302-403-0 from the old AGB assembly 335-300-110-0 as follows : (a) Remove the bolts J644P12B and washers 649-341-031-0 which attach the old starter drive pad assembly 335-300-803-0 to AGB housing. (b) Remove the old starter drive pad assembly 335-300-803-0 with the handcranking 62 tooth gearshaft assembly 335-302-403-0, use the P12 of tool set - jackscrews, 856A1130G01. (c) Install a protective rubber cover on the inner race of the roller bearing 301-480-720-0 or 301-480-723-0 or 301-480-724-0 or 301-480-726-0 or 340-055-801-0 of the 62 tooth gearshaft assembly 335-302-403-0. (3) Remove the handcranking 62 tooth gearshaft assembly 335-302-403-0 from the old starter drive pad assembly 335-300-803-0 as follows :

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 12ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (a) Remove the nuts J626P04 which attach the 62 tooth gearshaft assembly 335-302-403-0 with its oil collector 335-309-900-0 from the starter drive pad assembly 335-300-803-0. (b) Lightly heat the bearing housing on the starter drive pad assembly 335-300-803-0 with a heat gun. Do not increase the temperature of housing over 300°F (150°C). (c) Remove the 62 tooth gearshaft assembly 335-302-403-0 with its ball bearing 335-304-401-0 or 335-304-402-0 or 335-304-403-0 or 340-052-602-0 and oil collector 335-309-900-0 from the old starter drive pad assembly 335-300-803-0. Keep the 62 tooth gearshaft assembly for reinstallation. (d) Remove and discard the old starter drive pad assembly 335-300-803-0 and the O-rings J221P163 or 649-393-163-0 and J221P158 or 649-393-158-0 . (4) Remove the oil nozzle 335-310-300-0 from the old starter drive pad assembly 335-300-803-0 of old AGB assembly 335-300-110-0 as follows : (a) Remove the nut J626P04 which attach the oil nozzle 335-310-300-0 to the old starter drive pad assembly 335-300-803-0. (b) Remove the oil nozzle 335-310-300-0 from the starter drive pad assembly. (c) Remove and discard the O-rings J221P012 or 649-393-012-0 and J221P013 or 649-393-013-0. (5) Remove the spool 335-310-200-0 from its location in the housing of old AGB assembly 335-300-110-0 as follows : (a) Remove the spool 335-310-200-0 from its place in the AGB housing. (b) Remove and discard the O-rings J221P114 or 649-393-114-0 and J221P013 or 649-393-013-0. C. Impingement Test of the Oil Nozzle 335-310-300-0 of the new starter drive pad assembly335-300-807-0. Refer to gure 1, gure 4 and gure 5.
N O T E : This step concerns the rework of old AGB assembly 335-300-110-0 to the new AGB assembly 335-300-112-0. (1) Install the oil nozzle 335-310-300-0 on the new starter drive pad assembly 335-300-807-0 of new AGB assembly 335-300-112-0 as follows :

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 13ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One W

A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (a) Lightly coat the new O-rings 649-393-012-0 or J221P012 and 649-393-013-0 or J221P013 with engine oil (CP2442) . Install the new O-rings 649-393-012-0 or J221P012 and 649-393-013-0 or J221P013 on the outer diameter of oil nozzle 335-310-300-0. (b) Install the oil nozzle 335-310-300-0 o n the new starter drive pad assembly 335-300-807-0 with the stud 649-079-401-0 as locator.
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (c) Lightly coat the nut J626P04 with engine oil (CP2442) . (d) Install the nut J626P04 which attach the oil nozzle 335-310-300-0 to the new starter drive pad assembly 335-300-807-0. (e) Torque the nut J626P04 to 97-106 lb in. (11-12 N.m). (2) Install the target P01 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 as follows: (a) Install the master index P02 in its location on the target P01 of the Target - AGB oil nozzle air impingement check , tool (Line N°2), 856A2979G01. (b) Install the target P01 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 in its location on the rear face of the new starter drive pad assembly 335-300-807-0. Align the holes of the target P01 with the studs 649-079-402-0. (c) Attach the target P01 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 to the rear face of the new starter drive pad assembly 335-300-807-0 with the knurled nut P03. (d) Tighten with hand the knurled nut P03. (3) Install the new starter drive pad assembly 335-300-807-0 on the support plate P10 of Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 as follows:

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 14ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (a) Install the centering pin P14 in its location on the support plate P10 of Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (b) Install the support plate P10 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 on the adaptation support of riggingxture, 856A3545G03. (c) Attach the support plate P10 to the adaptation support with the two bolts ofrigging xture, 856A3545G03. Tighten with hand the two bolts. (d) Install the new starter drive pad assembly 335-300-807-0 on the support plate P10 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. Align the hole of the starter drive pad with the centering pin P14. (e) Install the two threaded rods P13 with xing guides and nuts P15 on their locations on the support plate P10 of Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (f) Attach the new starter drive pad assembl y 335-300-807-0 to the threaded rod P13 installed on the support plate P1 0 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 85 6A2979G01 with xing guides and the nuts P15. Tighten with hand the nuts P15. (g) Make sure that the starter drive pad assembly 335-300-807-0 is correctlyinstalled and tightened on the rigging xture, 856A3545G03. (4) Install the connecting tube P09 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 as follows:
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE IN A WELL-VENTILLATED AREA. (a) Lightly coat two new O-rings 649-393-013-0 or J221P013 with engine oil (CP2442) . (b) Install the O-rings 649-393-013-0 or J221P013 in the grooves of the joint base P04 (pad side) and joint base P05 (housing side) of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (c) Put the joint base P04 in position at the rear face of the new starter drive pad assembly 335-300-807-0.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 15ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (d) Install the two xing guides, threaded rods P13 and nuts P15 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 from the front face of the new starter drive pad assembly 335-300-807-0. (e) Attach the joint base P04 to the new starter drive pad assembly 335-300-807-0with the two xing guides, threaded rods P13 and nuts P15 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (f) Tighten with hand the nuts P15. (g) Put the joint base P05 in position at the spool 335-310-200-0 location of the AGB housing. (h) Attach the joint base P05 to the AGB housing with the two threaded bolts of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (i) Tighten with hand the two threaded bolts. (j) Install the connecting tube P09 (exib le) with its threaded adaptors P12 and BS rings P11 between the two joint bases P04 and P05 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (k) Make sure that connecting tube P09 is correctly installed. (l) Tighten with hand the two coupling nuts of connecting tube P09 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (5) Installation of the test installation Tool set, Targets - AGB oil nozzle air impingement checks (tool set), 856A3548G02 as follows : (a) Connect the test installation through connecting tting of Tool set, Targets - AGB oil nozzle air impingement checks (tool set), 856A3548G02 to the restrictor nipple 335-308-500-0. (b) Set the test conditions as follows:
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A R N I N G : CALIBRATION FLUID IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTION EQUIPMENT. USE IN A WELL-VENTILATED AREA. 1 Calibration uid: calibration uid (CP5069) .
2 Temperature: 80.6 to 89.6 deg F (27 to 32 deg C). 3 Supply pressure: 2.9 to 3.1 bar.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 16ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One 4 Total AGB ow rate: 167.0 to 184.3 US gal/h (634,0 to 697,4 l/h) as monitored on the owmeter during the test. (c) After the stability of parameters, supply the pressure to the oil nozzle and verify the following :
1 The direction of oil jet is correct.
2 The quality of oil jet is correct. You must have a homogenous jet and not have a spray pattern.
N O T E : A light spray of oil around the target hole is acceptable. The jet section can have an incompletely circular shape. (d) After you complete the test, let the pressure decrease gradually. (e) If the test result is not correct, replace the new starter drive pad assembly 335-300-807-0 and do the test again. (f) Disconnect the connecting tting of Tool set, Targets - AGB oil nozzle air impingement checks (tool set), 856A3548G02 from the restrictor nipple 335-308-500-0. (6) Remove the connecting tube P09 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 as follows: (a) Loosen the two coupling nuts of connecting tube P09 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (b) Remove the connecting tube P09 (exible) and its threaded adaptors P12 and BS rings P11 from the two joint bases P04 and P05 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (c) Loosen the two threaded bolts of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 which attach the joint base P05 to the AGB housing . (d) Remove the joint base P05 from the AGB housing. (e) Loosen and remove the two nuts P15, threaded rods P13 and xing guides of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 which attach the joint base P04 to the new starter drive pad assembly 335-300-807-0.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 17ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (f) Remove the joint base P04 from the rear face of the new starter drive pad assembly 335-300-807-0. (g) Remove and discard the O-rings 649-393-013-0 or J221P013 from the grooves of the joint base P04 and joint base P05 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (7) Remove the new starter drive pad assembly 335-300-807-0 from the support plate P10 of Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 as follows: (a) Loosen and remove the threaded rod P13 with the nut P15 and the xing guide which attach the new starter drive pad assembly 335-300-807-0 on the support plate P10 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (b) Remove the new starter drive pad assembly 335-300-807-0 from the support plate P10 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (c) Loosen the two bolts which attach the support plate P10 to the adaptationsupport of rigging xture, 856A3545G03. (d) Remove the support plate P10 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 from the adaptation support of riggingxture, 856A3545G03. (e) Remove the centering pin P14 from its location on the support plate P10 of Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01. (8) Remove the target P01 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 as follows: (a) Loosen and remove the knurled nut P03 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01 which attach the target P01 to the rear face of the new starter drive pad assembly 335-300-807-0. (b) Remove the target P01 of the Target - AGB oil nozzle air impingement check, tool (Line N°2), 856A2979G01.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 18ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (c) Remove the master index P02 from the target P01 of the Target - AGB oil nozzle air impingement check , tool (Line N°2), 856A2979G01.
D. Installation of the spool 335-310-200-0 and the new starter drive pad assembly 335-300-807-0 on the new AGB assembly 335-300-112-0. Refer to Engine Shop Manual(ESM), ATA 72-63-00, Assembly 001. Refer to gure 2, gure 3 and gure 4.
N O T E : This step concerns the rework of old AGB assembly 335-300-110-0 to the new AGB assembly 335-300-112-0. (1) Install the spool 335-310-200-0 in its place in the new AGB assembly 335-300-112-0 as follows:
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (a) Lightly coat the new O-ring 649-393-114-0 or J221P114 with engine oil (CP2442) . Install the new O-ring 649-393-114-0 or J221P114 on the outer diameter of spool 335-310-200-0.
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (b) Lightly coat the new O-rings 649-393-013-0 or J221P013 with engine oil (CP2442) . Install the new O-rings 649-393-013-0 or J221P013 on the grooves of spool 335-310-200-0. (c) Install the new spool 335-310-200-0 with the O-rings 649-393-013-0 or J221P013 and O-ring 649-393-114-0 or J221P114 in its place between the AGB housing and the new starter drive pad assembly 335-300-807-0. (2) Install the handcranking 62 tooth gearshaft assembly 335-302-403-0 on the newstarter drive pad assembly 335-300-807-0 as follows :
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 19ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (a) Lightly coat the outer diameter of the ball bearing 335-304-401-0 or 335-304-402-0 or 335-304-403-0 or 340-052-602-0 of the 62 tooth gearshaft assembly 335-302-403-0 with engine oil (CP2442) . (b) Heat the bearing housing on the new starter drive pad assembly 335-300-807-0 with a heat gun. Do not increase the temperature of the bearing housing over 311°F (155°C). (c) Install the ball bearing end of the 62 tooth gearshaft assembly 335-302-403-0 with its oil collector 335-309-900-0 in the new starter drive pad assembly 335-300-807-0 with the studs on pad as locators. (d) Install the oil collector 335-309-900-0 relative to the ball bearing. Align the oil collector with the studs on pad. (e) Attach the 62 tooth gearshaft assembly 335-302-403-0 and its oil collector 335-309-900-0 to the studs 649-079-402-0 of the new starter drive pad assembly 335-300-807-0 with the self locking nuts J626P04. (f) Let the parts go back to ambient temperature. (g) Torque the nuts J626P04 to 97-106 lb in. (11-12 N.m). (h) Make sure that the 62 tooth gearshaft assembly 335-302-403-0 is fully engaged in the starter drive pad assembly 335-300-807-0 with a 0.0016 inch (0,04 mm) feeler gage to verify the clearance between the ball bearing ange and the starter drive pad surface. Refer to Engine Shop Manual (ESM), ATA 72-63-00, Assembly 001.
E. Installation of the new oil seal assembly 335-317-805-0, handcranking cover assembly 335-322-806-0 on the new AGB assembly 335-300-112-0. Refer to Engine Shop Manual(ESM), ATA 72-63-00, Assembly 001. Refer to gure 2, gure 3, gure 4, gure 6, gure7 and gure 8.
N O T E : This step concerns the rework of old AGB assembly 335-300-110-0 to the new AGB assembly 335-300-112-0. (1) Assembly of the new removal/installation tool, 856A2971G02 to install the new oil seal assembly 335-317-805-0 on the handcranking 62 tooth gearshaft assembly335-302-403-0 as follows: Refer to gure 7 (a) Install the grip P16 of the removal/installation tool, 856A2971G02 into the sheath P17. Tighten the grip in the sheath.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 20ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (b) Install the knurled nut P19 of the removal/installation tool, 856A2971G02 onthe grip P16. Align the holes and x with screws P20. (c) Install the guide axis P18 of the removal/installation tool, 856A2971G02 through the hole of the expander P05. (d) Install the dowel pin P21 into the hole of the guide axis P18 of the removal/installation tool, 856A2971G02. (e) Install the anti-rotation key P06 into the notch of the guide axis P18 of the removal/installation tool, 856A2971G02. (f) Insert the guide axis P18 equipped with expander P05 of the removal/installation tool, 856A2971G02 into the grip P16. (g) Align the anti-rotation key P06 with the guide splines of grip P16 of the removal/installation tool, 856A2971G02. Fully insert the guide axis into the grip. (h) Install the nut P08 on guide axis P18 of the removal/installation tool, 856A2971G02. (i) Install the at washer P12 and the screw P11 on guide axis P18 of the removal/installation tool, 856A2971G02.
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (j) Lightly coat the VitonE O-ring P14 (Ø19 x 3.53 mm (Ø0,75 x 0,1390 in.)) of the removal/installation tool, 856A2971G02 with engine oil (CP2442) . Install the O-ring on the outer diameter of centering guide P09 of the removal/installation tool, 856A2971G02. (k) Engage the centering guide P09 of the removal/installation tool, 856A2971G02 into the upper end of the handcranking 62 tooth gearshaft assembly 335-302-403-0. CA U T I O N : USE CLEAN, LINT-FREE GLOVES WHEN YOU TOUCH THE OIL SEAL TO PREVENT CONTAMINATION. (2) Install the mating ring 335-317-702-0 of new oil seal assembly 335-317-805-0 on the handcranking 62 tooth gearshaft assembly 335-302-403-0 as follows: Refer togure 3, gure 6 and gure 7

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 21ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One CA U T I O N : MAKE SURE THE POLISHED FACE OF THE MATING RING AND THE CARBON FACE OF THE SEAL HOUSING ARE CLEAN. LEAKS WILL OCCUR IF PARTICLES, EVEN OF A VERY SMALL SIZE, ARE BETWEEN THESE PARTS DURING THE INSTALLATION. (a) Clean the mating surface of the mating ring 335-317-702-0 with tissue paper. (b) Clean the glazed surface of the oil seal 335-324-202-0 with tissue paper.
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A R N I N G : VAT TANK COVERS AND EXTINGUISHERS MUST BE AVAILABLE IF A FIRE OCCURS. SOLVENT IS FLAMMABLE.
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A R N I N G : CLEANING SOLVENT IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTIVE EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA.. CA U T I O N : OBEY THE ENVIRONMENTAL REGULATION WHEN YOU DISCARD CONSUMABLE PRODUCTS. (c) Clean the surface of the handcranking 62 tooth gearshaft assembly 335-302-403-0 mating with the oil seal mating ring with a lint-less cloth moistened by Acetone (CP1039) . (d) Lightly coat the O-ring 335-324-301-0 of the new oil seal assembly 335-317-805-0 with vaseline (CP5070) . (e) Install the O-ring 335-324-301-0 in the groove at the inner diameter of new mating ring 335-317-702-0.
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (f) Lightly coat the mating surface of the mating ring 335-317-702-0 with engine oil (CP2442) . (g) Lightly coat the mating surfaces of the handcranking 62 tooth gearshaft assembly 335-302-403-0 which is in contact with the O-ring 335-324-301-0 on the mating ring 335-317-702-0 with engine oil (CP2442) . (h) Loosen the nut P08 and the grip P16 of removal/installation tool, 856A2971G02. (i) Install the mating ring 335-317-702-0 on the claws of grip P16 of removal/installation tool, 856A2971G02.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 22ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (j) Tighten the grip P16 and nut P08 of removal/installation tool, 856A2971G02. Make sure that the position of ring is correct in the claws of the grip P16. (k) Tighten the sheath P17 of removal/installation tool, 856A2971G02 to lock the mating ring 335-317-702-0 in the claws of the grip P16. (l) Insert the mating ring 335-317-702-0 with the removal/installation tool, 856A2971G02 into its centering guide P09. (m) Install the mating ring 335-317-702-0 on the handcranking 62 tooth gearshaft assembly 335-302-403-0 with the removal/installation tool, 856A2971G02. (n) Turn the removal/installation tool, 856A2971G02 until the lugs of mating ring 335-317-702-0 engage into the slots of the ball bearing inner race. (o) Make sure that the mating ring 335-317-702-0 is correctly installed. The bottom face of the side window of sheath P17 removal/installation tool, 856A2971G02 must be in line with the AGB forward face. (p) Loosen the sheath P17 of removal/installation tool, 856A2971G02. (q) Push the removal/installation tool, 856A2971G02 to make sure that the mating ring 335-317-702-0 stays in place. CA U T I O N : MAKE SURE THAT THE GRIP CLAWS ARE TOTALLY LOOSENED AND THAT YOU DO NOT PULL AND DISENGAGE THE MATING RING WITH THE REMOVAL/INSTALLATION TOOL. RING DAMAGE AND OIL LEAKAGE CAN OCCURS. (r) Loosen the nut P08 and the grip P16 of the removal/installation tool, 856A2971G02. (s) Remove the removal/installation tool, 856A2971G02 from the starter drive pad assy. (t) Remove the centering guide P09 of the removal/installation tool, 856A2971G02 from the 62 tooth gearshaft assembly 335-302-403-0.
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (u) Lightly coat the mating surface of the mating ring 335-317-702-0 with engine oil (CP2442) .

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 23ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One CA U T I O N : USE CLEAN, LINT-FREE GLOVES WHEN YOU TOUCH THE OIL SEAL TO PREVENT CONTAMINATION. (3) Prepare the installation of oil seal housing 335-324-202-0 of new oil seal assembly335-317-805-0 as follows: Refer to gure 3, gure 6 and gure 7
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A R N I N G : VAT TANK COVERS AND EXTINGUISHERS MUST BE AVAILABLE IF A FIRE OCCURS. SOLVENT IS FLAMMABLE.
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A R N I N G : CLEANING SOLVENT IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTIVE EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. CA U T I O N : OBEY THE ENVIRONMENTAL REGULATION WHEN YOU DISCARD CONSUMABLE PRODUCTS. (a) Remove the grease from the mating surface of oil seal housing assembly 335-324-202-0 with a lint-less cloth moistened by acetone (CP1039) . (b) Remove the grease from the mating surface of new starter drive pad assembly 335-300-807-0 with a lint-less cloth moistened by acetone (CP1039) .
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (c) Lightly coat the O-ring 649-393-032-0 or J221P032 of the new oil seal assembly 335-317-805-0 with engine oil (CP2442) . (d) Install the O-ring 649-393-032-0 or J221P032 in the groove at the outer diameter of new oil seal 335-324-202-0. CA U T I O N : BE CAREFUL DO NOT HIT THE OIL SEAL INTO THE GEARBOX RECESS. THE MATING RING CAN MOVE APART AND CARBON SEAL CAN BE DAMAGED. (e) Install the oil seal housing assembly 335-324-202-0 on handcranking 62 tooth gearshaft assembly 335-302-403-0. S lowly lower the housing assembly. (f) Make sure that the housing of oil seal 335-324-202-0 is correctly engaged with the three studs 649-079-400-0 on the new starter drive pad assembly 335-300-807-0. (g) Apply a thin layer of vaseline (CP5070) on the threads of three nuts J626P03.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 24ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (h) Attach the housing oil seal 335-324-202-0 with the nuts J626P03 and the three washers 649-341-010-0 of new starter drive pad assembly 335-300-807-0. (i) Torque the three nuts J626P03 which attach the housing of oil seal 335-324-202-0 to 29.2-32.7 lb in. (3.3-3.7 N.m). (4) Install the new starter drive pad assembly 335-300-807-0 with the handcranking 62 tooth gearshaft assembly 335-302-403-0 on the new AGB assembly 335-300-112-0 as follows:
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (a) Lightly coat the new O-rings J221P163 or 649-393-163-0 and J221P158 or 649-393-158-0 with engine oil (CP2442) . (b) Install the new O-rings J221P163 or 649-393-163-0 on the new starter drive pad assembly 335-300-807-0. (c) Install the new O-ring J221P158 or 649-393-158-0 on the AGB housing. (d) Remove the rubber cover from the inner race of the roller bearing 301-480-720-0or 301-480-723-0 or 301-480-724-0 or 301-480-726-0 or 340-055-801-0 of the 62 tooth gearshaft assembly 335-302-403-0. (e) Lower carefully the new starter drive pad assembly 335-300-807-0 with the 62 tooth gearshaft assembly 335-302-403-0 in position. Do a special attention when you engage the inner race of the roller bearing 301-480-720-0 or 301-480-723-0 or 301-480-724-0 or 301-480-726-0 or 340-055-801-0 with its outer race. (f) Do a special attention when you engage the new O-rings J221P163 or 649-393-163-0 in the AGB housing. (g) Apply a thin layer of Graphite compound (CP2101) on the threads of bolts J644P12B. (h) Install the bolts J644P12B and washers 649-341-031-0 which attach the new starter drive pad assembly 335-300-807-0 to AGB housing.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 25ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (i) Torque the bolts J644P12B which attach the new starter drive pad assembly 335-300-807-0 to 97-106 lb in. (11-12 N.m).
F. Do the leak test of the new AGB assembly 335-300-112-0 before its installation on the engine assembly. Refer to Engine Shop Manual (ESM), ATA 72-63-00, Assembly 001.
N O T E 1 : This step concerns the rework of old AGB assembly 335-300-110-0 to the new AGB assembly 335-300-112-0.
N O T E 2 : When you do the leak test shown in Engine Shop Manual (ESM), ATA 72-63-00, Assembly 001, use the spray leak detector to detect any air leakage.
N O T E 3 : When you nish the leak test shown in Engine Shop Manual (ESM), ATA 72-63-00, Assembly 001, do the following steps to make sure that the new oil seal assembly 335-317-805-0 correctly operates and there in no leakage through it. (1) Install the new handcranking cover assembly 335-322-806-0 on the new starter drive pad assembly 335-300-807-0 of new AGB assembly 335-300-112-0 as follows :
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (a) Apply a thin layer of engine oil (CP2442) on new O-ring 649-393-034-0 or J221P034. (b) Install the new O-ring 649-393-153-0 or J221P153 in the groove of new handcranking cover assembly 335-322-806-0. (c) Install the new handcranking cover assembly 335-322-806-0 on the new starter drive pad assembly 335-300-807-0. (d) Make sure that the new handcranking cover assembly 335-322-806-0 is correctly seated on the new starter drive pad assembly 335-300-807-0.
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A R N I N G : ENGINE OIL IS TOXIC. USE PERSONAL PROTECTION EQUIPMENT. USE PERSONAL PROTECTION WELL-VENTILATED AREA. (e) Apply a thin layer of engine oil (CP2442) on the threads of bolts J644P11B. (f) Attach the new handcranking cover assembly 335-322-806-0 to the newstarter drive pad assembly 335-300-807-0 with the ve bolts J644P11B and washers 649-341-031-0.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 26ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (g) Torque the new bolts J644P11B to 97-106 lb in. (11-12 N.m). (h) Install a protective cover on the cabl e of the new handcranking cover assembly 335-322-806-0 to prevent injury. (2) Install the starter drive pad sealing item P06 of leak test tool set, 856A3549G02 and tighten it to the starter drive pad with bolts provided to cover the pad. (3) Connect the test air supply hose under the following conditions to union P05 of leak test tool set, 856A3549G02, to the nipple J1037P06 of new starter drive pad assembly 335-300-807-0: (a) Water content: dew point -40°F (-40°C) at atmospheric pressure. (b) Temperature: ambient. (c) Air ltration: lower than 40 microns, absolute.
N O T E : If the air supply source does not agree with the above test conditions, replace by nitrogen of quality R. (d) Deoiling: weight of remaining oil, less than 40 mg/kg of air. (4) Do the test as follows, slowly pressurize the oil seal compartment up to 10-12 psig (70-80 kPa gage). (5) When you get the pressure level, close the test installation isolation valve and close the air supply. (6) Make sure that the pressure level is stable on the test installation pressure gage for 10 minutes. There must be no pressure decrease shown on the pressure gage. If so, correct as follows: (a) Find the leak, use spray leak detector. (b) Depressurize the oil seal compartment. (c) Remove the oil seal and install a new one. (d) Do the leak test again. (7) When you nish the leak test, release the pressure in the oil seal compartment.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 27ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One (8) Loosen the bolts which attach the starter drive pad sealing item P06 of leak test tool set, 856A3549G02 from the starter drive pad. Remove the starter drive pad sealing item P06 from the pad. G. Re-identication of the Old AGB assembly 335-300-110-0 to the new Part Number 335-300-112-0.
N O T E : This step concerns the rework of old AGB assembly 335-300-110-0 to the new AGB assembly 335-300-112-0. (1) Re-identify the old AGB assembly 335-300-110-0 to the new AGB assembly 335-300-112-0. Refer to SPM, ATA 70-10-12, Vibro-Peen Marking as follows: (a) Score out the old Part Number of the old AGB assembly 335-300-110-0 on theAGB assembly identication plate. Refer to gure 1, sheet 1 of 2. (b) Mark the new Part Number of the new AGB assembly 335-300-112-0 and theService Bulletin Number on the AGB assembly Identication plate.
H. Installation of the new AGB assembly 335-300-112-0 on the engine assembly. Refer toEngine Shop Manual (ESM), ATA 72-00-63, Installation 001. Refer to gure 1 and gure 2.
N O T E : When you install the fuel supply tube assy 335-216-301-0 or 335-216-302-0 on the new AGB 335-300-112-0, install the new cable 335-322-902-0 of the new handcranking cover assy 335-322-806-0 with bolt J644P06A on new AGB 335-300-112-0.

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 28ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Location of Change Figure 1 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 29ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Removal / Installation of the Handcranking Cover and Starter Drive Pad Assemblies Figure 2, Sheet 1 of 2 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 30ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Removal / Installation of the Handcranking Cover and Starter Drive Pad Assemblies Figure 2, Sheet 2 of 2

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 31ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of Handcranking 62 Tooth Gearshaft and Cover Assemblies Figure 3, Sheet 1 of 4 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 32ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of Handcranking 62 Tooth Gearshaft and Cover Assemblies Figure 3, Sheet 2 of 4 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 33ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of Handcranking 62 Tooth Gearshaft and Cover Assemblies Figure 3, Sheet 3 of 4 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 34ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of Handcranking 62 Tooth Gearshaft and Cover Assemblies Figure 3, Sheet 4 of 4

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 35ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of the Starter Drive Pad Assy Figure 4, Sheet 1 of 4 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 36ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of the Starter Drive Pad Assy Figure 4, Sheet 2 of 4 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 37ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of the Starter Drive Pad Assy Figure 4, Sheet 3 of 4 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 38ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of the Starter Drive Pad Assy Figure 4, Sheet 4 of 4 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 39ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Impingement Test of the Oil Nozzle on the Starter Drive Pad (Typical) Figure 5, Sheet 1 of 3 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 40ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Impingement Test of the Oil Nozzle on the Starter Drive Pad (Typical) Figure 5, Sheet 2 of 3 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 41ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Impingement Test of the Oil Nozzle on the Starter Drive Pad (Typical) Figure 5, Sheet 3 of 3 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 42ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

New Oil Seal Assy Figure 6

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 43ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Installation of the Mating Ring of the New Oil Seal Assy with Tool 856A2971G02 Figure 7 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 44ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One

Old and New Conguration of the Handcranking Cover Assy Figure 8 CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 45ENGINE - General (72-00-00) - Introduction of a New Accessory Gearbox Assembly (AGB) with a New Starter Drive Pad and New Handcranking Cover and Rework of Old AGB to the New One 4. A

- P A RTS P RO G R E S S I O N C H A RT

P a rt N u m b e r Part Name and/or C h a ra cte ri sti cs Identied by S e rv i ce B u l l et i n N o

. 335-300-103-0 Gearbox Assy Accessory Baseline 335-300-105-0 Gearbox Assy Accessory 72-0008 335-300-106-0 Gearbox Assy Accessory 72-0048 335-300-107-0 Gearbox Assy Accessory 72-0254 335-300-108-0 Gearbox Assy Accessory 72-0290 335-300-109-0 Gearbox Assy Accessory 72-0407 335-300-110-0 Gearbox Assy Accessory 72-0500 335-300-112-0 Gearbox Assy Accessory 72-1129

335-322-601-0 Cover baseline 335-322-602-0 Cover 72-0155 335-322-801-0 Cover - Assy 72-0500 335-322-802-0 Cover - Assy 72-0888 335-322-803-0 Cover - Assy 72-0889 335-322-603-0 Cover 72-0500 335-322-806-0 Cover - Assy 72-1129

335-300-801-0 Pad Assy - Drive Starter Baseline 335-300-802-0 Pad Assy - Drive Starter 72-0004 335-300-803-0 Pad Assy - Drive Starter 72-0155 335-300-807-0 Pad Assy - Drive Starter 72-1129

335-317-802-0 Seal Assy - Oil Baseline Deleted by S/B 72-0155 335-317-805-0 Seal Assy - Oil 72-1129

CFM56-3/3B/3C S/B 72-1129 March 09, 2011 PAGE 46