ENGINE FUEL AND CONTROL (73-00-00) - Use of CIS Fuels in CFM56-5B Engines

CFM PROPRIETARY INFORMATION

The information contained in this document is CFM proprietary information and is disclosed in

confidence. 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, modifications, spare

parts, design, or configuration changes or to obtain FAA or any other government or regulatory

approval to do so. If consent is given for reproduction in whole or in part, this notice and the

notice set forth on each page of this document shall appear in any such reproduction in whole

or 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.

November 19, 2003 CFM56-5B S/B 73-0122

Revision 08, March 08, 2012 PAGE 1 of 5
ENGINE FUEL AND CONTROL (73-00-00) - Use of CIS Fuels in CFM56-5B Engines

TRANSMITTAL INFORMATION

REVISION 8 TO SERVICE BULLETIN 73-0122

Revision 8 is issued to update paragraphs 1., PLANNING INFORMATION and 3.,

ACCOMPLISHMENT INSTRUCTIONS.

Revision 7 was issued August 18, 2011. Revision 6 was issued April 23, 2009. Revision 5 was

issued August 22, 2007. Revision 4 was issued May 07, 2007. Revision 3 was issued July 20,

2006. Revision 2 was issued January 30, 2006. Revision 1 was issued November 30, 2004. The

original was issued November 19, 2003. Revision bars in the left margin identify changes.

1. PLANNING INFORMATION

A. Effectivity and Description

CFM56-5B1, -5B2, -5B4, -5B5, -5B6, -5B7, -5B1/P, -5B1/2P, -5B1/3, -5B2/P,

-5B2/2P, -5B2/3, -5B3/P, -5B3/2P, -5B3/3, -5B3/3B1, -5B4/P, -5B4/2P, -5B4/3,

-5B4/3B1, -5B5/P, -5B5/3, -5B6/P, -5B6/2P, -5B6/3, -5B7/P, -5B7/3, -5B8/P, -5B8/3,

-5B9/P, -5B9/3

(1) All CFM56-5B series engines with commonwealth of independent states (CIS)

fuels or fuel additives which are uploaded 50 percent to 100 percent of the

time based on any 1 year average, since last hydromechanical unit (HMU)

shop visit, are affected by this Service Bulletin.

(2) This Service Bulletin defines the CIS fuels and fuel additives that are fully

approved for use in the CFM56-5B series engines. It also defines the

requirements for other fuels and fuel additives that are acceptable for use

provided that engine component inspections/cleaning are performed. Refer to

Table 1 for a listing of CIS fuel types and additives along with any associated

requirements.

TABLE 1

Fuel Type Specification Special Requirements

RT GOST 10227 Fully Approved

RT GSTU 320.00149943.007 Fully Approved

TS-1 GOST 10227 Refer to paragraph

3., Accomplishment

Instructions.

TS-1 GSTU 320.00149943.011 Refer to paragraph

3., Accomplishment

Instructions.

November 19, 2003 CFM56-5B S/B 73-0122

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CFM PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.
ENGINE FUEL AND CONTROL (73-00-00) - Use of CIS Fuels in CFM56-5B Engines

Fuel Additive Specification Special Requirements

Liquid I (refer to Note 1)

(equivalent to EGME)

(anti-ice additive)

GOST 8313 Fully Approved

SIGBOL (refer to Note 2)

(anti-static additive)

TU38.101741 Fully Approved

NOTE 1: The maximum concentration must not exceed 0.15 percent by volume.

NOTE 2: The maximum concentration must not exceed 0.0005 percent by

volume.

(3) This Service Bulletin may be revised or canceled pending the results of fuel

specification equivalency testing.

B. Compliance

Category 2

CFM recommends you do the required inspections as soon as possible,

without effect on revenue service, per the requirements in ACCOMPLISHMENT

INSTRUCTIONS.

There are no concurrent requirements.

C. Reason

(1) Objective:

Define the requirements for use of CIS fuels and CIS fuel additives that

may not currently meet GE Aviation fuel specification D50TF2 as shown in

paragraph 1.A.(2), Table 1 above.

(2) Condition:

Certain CIS fuels do not currently meet the GE Aviation fuel specifications due

to differences in thermal stability testing methods defined in the respective

specifications.

(3) Cause:

None.

(4) Improvement:

This Service Bulletin defines which CIS fuels and fuel additives are fully

approved or approved with limitations for use in the CFM56-5B series engines.

November 19, 2003 CFM56-5B S/B 73-0122

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CFM PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.
ENGINE FUEL AND CONTROL (73-00-00) - Use of CIS Fuels in CFM56-5B Engines

(5) Substantiation:

Use of these fuels and additives is substantiated by the combination of

requirements defined in this document as well as successful operational

experience.

D. Approval

The technical content of this Service Bulletin is approved by the FAA and under the

Authority of DOA No. EASA.21J.086.

E. Manpower

No additional man-hours are necessary to do this Service Bulletin.

F. Weight and Balance

Weight and balance are not changed.

G. References

CFM56 Component Maintenance Manual (CMM) (73-11-42) CFMI-TM.CM.64

CFM56 Component Maintenance Manual (CMM) (73-11-43) CFMI-TM.CM.119

CFM56 Component Maintenance Manual (CMM) (73-11-44) CFMI-TM.CM.343

CFM56 Component Maintenance Manual (CMM) (73-21-18) CFMI-TM.CM.190

CFM56 Component Maintenance Manual (CMM) (73-21-78) CFMI-TM.CM.414

H. Publications Affected

None.

I. Interchangeability

Not applicable.

2. MATERIAL INFORMATION

A. Material - Price and Availability

None.

B. Industry Support Information

None.

November 19, 2003 CFM56-5B S/B 73-0122

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CFM PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.
ENGINE FUEL AND CONTROL (73-00-00) - Use of CIS Fuels in CFM56-5B Engines

3. ACCOMPLISHMENT INSTRUCTIONS

A. General

This section defines the necessary checks for engines that operate on TS-1 fuels

more than 50 percent of the time as defined in paragraph 1.A.(1)., Effectivity and

Description. These requirements can be satisfied as follows:

(1) At each engine shop visit, do a flow check of all fuel nozzles. Refer to the

CFM56 CMM, 73-11-42, 73-11-43, or 73-11-44.

(2) At each engine shop visit or every 10,000 flight hours, whichever comes

first, clean and inspect HMU as directed below. Refer to the CFM56 CMM,

73-21-18 or 73-21-78.

(a) Fully disassemble the HMU. Refer to the relevant CMM.

(b) Clean the hardware. Refer to the relevant CMM.

(c) Do an inspection of all other parts, check fits and clearances sections

after cleaning. Refer to the relevant CMM.

(d) Repair, re-assemble, calibrate, and final test the HMU. Refer to the

relevant CMM.

(3) At 3,000 flight hour intervals, do a general visual inspection (GVI) of all fuel

system components for leaks. Repair all leaks as required.

B. Contact CFM if any item fails an inspection or check.

November 19, 2003 CFM56-5B S/B 73-0122

Revision 08, March 08, 2012 PAGE 5

CFM PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.