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 in

condence. 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 46
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

1. PLANNING INFORMATION

A. Effectivity

CFM56-3, -3B, -3C

(1) The old Accessory Gearbox assembly (AGB) 335-300-110-0 and its old components

(Refer to paragraph 2.C. CONFIGURATION CHART) 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. CONFIGURATION CHART) will be introduced as spare

parts.

NOTE: There is no CFM56-3 engine in production line anymore.

B. Description

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.

CONFIGURATION CHART and gure 4.

This Service Bulletin provides also the accomplishment instructions to rework and reidentify

the old AGB 335-300-110-0 to the new AGB 335-300-112-0.

C. Compliance

Category 3

Do at next engine shop visit opportunity.

NOTE: This Service Bulletin can be accomplished in shop.

D. Concurrent Requirements

None.

E. Reason

(1) Objective:

CFM56-3/3B/3C S/B 72-1129

March 09, 2011 PAGE 2
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

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. Approval

The technical content of this document is approved by the FAA and under the authority of

DOA n° EASA.21J.086.

G. Manpower

You will need approximately 4 man-hours to replace the old starter drive pad assy by the

new one on the AGB.

H. Weight and Balance

Accomplishment of this Service Bulletin will result in a weight increase of

0.227 lb (0,103 kg).

I. References

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 3
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

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

NOTE: The reference documents listed below are for the engine manufacturer's internal

use only:

AAS : 27828 CAD: MOD095001

AAS : 27160 CAD: MOD051442

J. Publications Affected

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. Interchangeability

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 oil 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. Software Accomplishment Summary

None.

2. MATERIAL INFORMATION

A. Material - Price and Availability

(1) Parts necessary to do this Service Bulletin:

CFM56-3/3B/3C S/B 72-1129

March 09, 2011 PAGE 4
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

Part Number

Qty/

Eng Part Name

Unit

$ Price

Pkg

Qty

Lead

Time

Days

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 AssyHandcranking1,250.00 (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 5
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

NOTE 1: Prices can change.

NOTE 2: This kit 333-089-185-000 is added only to facilitate the spare parts

ordering process, but each part can be also purchased separately.

(2) Other Spare Parts:

Part Number

Qty/

Eng Part Name

Unit

$ Price

Pkg

Qty

Lead

Time

Days

335-300-112-0 (1) Gearbox Assy -

Accessory

Quote (-) Quote

NOTE: Prices can change.

(3) Consumables:

Code Number Description

CP1039 Acetone

CP2101 Graphite Compound

CP2442 Engine Oil

CP5069 Calibration Fluid

CP5070 Vaseline

B. Industry Support Information

Parts : CFM will provide a 50% back-end discount 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 6
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

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. Conguration Chart

New Part Number

Qty/

Eng Part Name

Old

Part Number/

IPC Location

Qty/

Eng OP

Chg/

Sprt

Code

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 7
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

New Part Number

Qty/

Eng Part Name

Old

Part Number/

IPC Location

Qty/

Eng OP

Chg/

Sprt

Code

.. 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 8
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

New Part Number

Qty/

Eng Part Name

Old

Part Number/

IPC Location

Qty/

Eng OP

Chg/

Sprt

Code

... 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 9
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

New Part Number

Qty/

Eng Part Name

Old

Part Number/

IPC Location

Qty/

Eng OP

Chg/

Sprt

Code

.. 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/-

NOTE 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 Interchangeability .

NOTE 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 10
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

NOTE 3: Operation Codes

AD = Added

DE = Deleted

RI = Reidentied

RM = Remains

RW = Reworked

SU = Superseded

NOTE 4: This part is not procurable.

D. Disposition of Parts

Part Numbers 335-322-802-0 and 335-300-803-0 removed to accomplish this Service

Bulletin may be locally scrapped.

E. Tooling - Price and Availability

Tool Number Description

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. ACCOMPLISHMENT INSTRUCTIONS

NOTE 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.

NOTE 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.

CAUTION: 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 11
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

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 Shop

Manual (ESM), ATA 72-63-00, Disassembly 001. Refer to gure 2, gure 3 and gure 4.

NOTE: 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 12
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

(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 assembly

335-300-807-0. Refer to gure 1, gure 4 and gure 5.

NOTE: 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 13
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

WARNING: 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 on the new starter drive pad assembly

335-300-807-0 with the stud 649-079-401-0 as locator.

WARNING: 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 14
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

(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 rigging

xture, 856A3545G03.

(c) Attach the support plate P10 to the adaptation support with the two bolts of

rigging 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 assembly 335-300-807-0 to the threaded

rod P13 installed on the support plate P10 of the Target - AGB oil nozzle air

impingement check, tool (Line N°2), 856A2979G01 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 correctly

installed 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:

WARNING: 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 15
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

(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 335-300-807-0

with 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 (exible) 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:

WARNING: 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 16
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

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.

NOTE: 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 17
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

(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 adaptation

support 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 rigging

xture, 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 18
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

(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.

NOTE: 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:

WARNING: 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.

WARNING: 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 :

WARNING: 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 19
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

(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, gure

7 and gure 8.

NOTE: 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 assembly

335-302-403-0 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 20
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

(b) Install the knurled nut P19 of the removal/installation tool, 856A2971G02 on

the 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.

WARNING: 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.

CAUTION: 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 to

gure 3, gure 6 and gure 7

CFM56-3/3B/3C S/B 72-1129

March 09, 2011 PAGE 21
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

CAUTION: 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.

WARNING: VAT TANK COVERS AND EXTINGUISHERS MUST BE AVAILABLE IF

A FIRE OCCURS. SOLVENT IS FLAMMABLE.

WARNING: CLEANING SOLVENT IS TOXIC AND FLAMMABLE. USE PERSONAL

PROTECTIVE EQUIPMENT. USE PERSONAL PROTECTION

WELL-VENTILATED AREA..

CAUTION: 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.

WARNING: 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 22
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

(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.

CAUTION: 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.

WARNING: 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 23
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

CAUTION: 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 assembly

335-317-805-0 as follows: Refer to gure 3, gure 6 and gure 7

WARNING: VAT TANK COVERS AND EXTINGUISHERS MUST BE AVAILABLE IF

A FIRE OCCURS. SOLVENT IS FLAMMABLE.

WARNING: CLEANING SOLVENT IS TOXIC AND FLAMMABLE. USE PERSONAL

PROTECTIVE EQUIPMENT. USE PERSONAL PROTECTION

WELL-VENTILATED AREA.

CAUTION: 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) .

WARNING: 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.

CAUTION: 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. Slowly 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 24
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

(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:

WARNING: 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 25
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

(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.

NOTE 1: This step concerns the rework of old AGB assembly 335-300-110-0 to the

new AGB assembly 335-300-112-0.

NOTE 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.

NOTE 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 :

WARNING: 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.

WARNING: 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 new

starter 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 26
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

(g) Torque the new bolts J644P11B to 97-106 lb in. (11-12 N.m).

(h) Install a protective cover on the cable 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.

NOTE: 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 27
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

(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.

NOTE: 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 the

AGB 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 the

Service Bulletin Number on the AGB assembly Identication plate.

H. Installation of the new AGB assembly 335-300-112-0 on the engine assembly. Refer to

Engine Shop Manual (ESM), ATA 72-00-63, Installation 001. Refer to gure 1 and gure 2.

NOTE: 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 28
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

Location of Change

Figure 1

CFM56-3/3B/3C S/B 72-1129

March 09, 2011 PAGE 29
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

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 30
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

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 31
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

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 32
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

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 33
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

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 34
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

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 35
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

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 36
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

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 37
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

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 38
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

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 39
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

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 40
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

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 41
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

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 42
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

New Oil Seal Assy

Figure 6

CFM56-3/3B/3C S/B 72-1129

March 09, 2011 PAGE 43
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

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 44
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

Old and New Conguration of the Handcranking Cover Assy

Figure 8

CFM56-3/3B/3C S/B 72-1129

March 09, 2011 PAGE 45
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

4. A - PARTS PROGRESSION CHART

Part Number

Part Name

and/or

Characteristics

Identied by

Service Bulletin No.

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