Single Engine 

Service Bulletin 

August30,2004 

TITLE 

ENGINE FUEL RETURN SYSTEM INSTALLATION 

EFFECTIVITY 

REASON 

Model 

172R 

172S 

Serial Numbers 

17280001 thru 17281187 

172S8001 thru 172S9490 

To provide parts and instructions to install an engine fuel return system. 

DESCRIPTION 

Cessna 

~ A Textron 5omnr 

SB04-28-03 

The engine fuel return system carries a metered amount of fuel from the engine fuel-air control unit to the fuel 

reservoir tank. The increased fuel flow due to the return system results in lower fuel temperatures at the 

engine inlet and helps to minimize the amount of fuel vapor generated in the fuel lines during high ambient 

temperature extended ground operations. 

COMPLIANCE 

Optional: may be accomplished if desired. 

APPROVAL 

FAA approval has been obtained on technical data in this publication that affects airplane type design. 

Page 1 of 3 

To obtain satisfactory results, procedures specified in this publication must be accomplished in accordance with accepted methods and 

prevailing government regulations. Cessna Aircraft Company cannot be responsible for the quality of work performed in accomplishing the 

requirements of this publication. 

Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, Kansas 67277, U.S.A. (316) 517-5800, Facsimile (316) 942-9006 

COPYRIGHT © 2004 
MANPOWER 

Approximately 5.0 man-hours to install MK172-28-01 

REFERENCES 

Model 172 Series 1996 and On Maintenance Manual 

NOTE: This information shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance 

Manual. 

OTHER PUBLICATIONS AFFECTED 

Model 172R and Model 172S Illustrated Parts Catalog 

NOTE: Make sure all publications used are complete and current. 

MATERIAL PRICE AND AVAILABILITY 

The part below is available from Cessna Parts Distribution through an appropriate Cessna Service Station for 

the suggested list price shown. 

Part Number 

MK172-28-01 

172RPHUSR09 

(See Note) 

172SPHUSR05 

(See Note) 

172R180PHUSR03 

(See Note) 

Description 

Engine Fuel 

Return System 

Installation Kit 

Revision 9, Model 

172R 

Pilot's Operating 

Handbook 

Revision 5, Model 

172S 

Pilot's Operating 

Handbook 

Revision 3, Model 

172R 180HP 

Pilot's Operating 

Handbook 

Qty/Airplane 

1 

1 (as required) 

1 (as required) 

1 (as required) 

$ 

$ 

$ 

$ 

ALL PRICES SUBJECT TO CHANGE WITHOUT NOTICE 

Price 

1 ,297.00 (A) ea 

56.00 (F) ea 

56.00 (F) ea 

56.00 (F) ea 

NOTE: This revision has been sent to applicable owners of record. Refer to SB04-11-02 for detailed 

information. 

CREDIT INFORMATION 

Not applicable 

ACCOMPLISHMENT INSTRUCTIONS 

Modification Kit MK172-28-01: Engine Fuel Return System Installation instructions are attached. 

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SB04-28-03 

August30,2004 
OWNER NOTIFICATION 

On September 13, 2004 the following message will be sent to applicable owners of record in SB04-28-03A. 

Dear Cessna Owner: 

This Owner Advisory is to inform you that Service Bulletin SB04-28-03 has been issued to provide parts and 

instructions to install an engine fuel return system. 

The engine fuel return system carries a metered amount of fuel from the engine fuel-air control unit to the fuel 

reservoir tank. The increased fuel flow due to the return system results in lower fuel temperatures at the 

engine inlet and helps to minimize the amount of fuel vapor generated in the fuel lines during high ambient 

temperature extended ground operations. 

NOTE: Section 4 of the Pilot's Operating Handbook contains standard fuel vapor procedures. 

Compliance is optional: may be accomplished if desired. 

The information contained in the referenced Cessna Service Bulletin shall be considered an amendment to the 

Cessna Manufacturer's Service/Maintenance Manual. 

Please contact a Cessna Single Engine Service Station for detailed information and arrange to have Cessna 

Service Bulletin SB04-28-03 accomplished on your airplane. 

SB04-28-03 

August30,2004 

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