# 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 instructionsto install an enginefuel return system. DESCRIPTION

# ~ Cessna A Textron5omnr

SB04-28-03

The enginefuel return system carries a metered amount offuel from the enginefuel-air control unitto thefuel reservoir tank. The increased fuel flow duetothe return system results in lowerfuel temperatures atthe engine inlet and helpsto minimize the amount offuel 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 publicationthat 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. CessnaAircraft Company cannot be responsible for the quality ofwork performed in accomplishing the requirements of this publication. Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, Kansas67277, U.S.A. (316) 517-5800, Facsimile (316) 942-9006 COPYRIGHT© 2004MANPOWER 

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

### Model 172 Series 1996 and On Maintenance Manual NOTE: 

### This informationshall beconsideredan amendmenttothe Cessna Manufacturer'sService/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 Distributionthrough an appropriate Cessna Service Stationfor 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. Page2 SB04-28-03 August30,2004OWNER NOTIFICATION On September 13, 2004the following messagewill be sentto applicable owners of record in SB04-28-03A. Dear Cessna Owner: This OwnerAdvisory is to inform you that Service Bulletin SB04-28-03 has been issued to provide parts and instructions to install an enginefuel return system. The engine fuel return system carries a metered amount offuel from the engine fuel-air control unit to thefuel reservoirtank. The increased fuel flow duetothe return system results in lowerfuel temperatures atthe engine inlet and helpsto minimize the amount of fuel vapor generated in the fuel lines during high ambient temperature extended ground operations. NOTE: Section 4 ofthe Pilot's Operating Handbookcontains 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 amendmentto the Cessna Manufacturer's Service/Maintenance Manual. Please contact a Cessna Single Engine Service Station for detailed information and arrangeto have Cessna Service Bulletin SB04-28-03 accomplished on your airplane.

SB04-28-03 August30,2004 * 

### * * * * * *

Page3