# Single Engine Service Bulletin
June 18, 2007

T IT LE F UEL RETUR N LINE INSPECTION
EFFECTIVITY Model 172R 172S

RE A SON Seri al Numbers 17281188 thru 17281390 17259491 thru 172510489

# :r~ Cessna A Textro n Compan

. SB07-28-01

A report has been rece ived that a part number 0500118-49 Fuel Return Line Assembly was found rubbing agai nst the right steering tube assembly duri ng full rudder pedal actuation.
DESCRIPTION This Service Bulletin provides instructions to inspect th e fuel return line for damage, and if necessary, repair or rep lace the line assembly. Non-compliance with this Service Bulletin could potentially result i n a fue l l eak.
COMPLIANCE Mandatory: shall be accomplished at the next scheduled maintenance or inspection not to exceed 100 hours of ope ration or 12 months , wh i chever occurs first.
APPROVAL FAA approval has been o btained on technical data in th is publ ication that affects airplane type design.
MA NPOWER 0.8 man-hour for in spection If necessary, add 0.4 man-hour to repair the fue l return line assem bly If necessary, add 0.3 man-hour to replace the fuel retu rn li ne assem bly Page 1 of 7 To obtain sati sfactory results, procedures specified i n th is publication must be accompl ished i n accordance with accepted methods and prevailing government regulations. Cessna Aircraft Company cannot be responsible for the quality of work performed i n accomp lishing the requ i rements of this publ ication

. Cessna Aircraft Company, Product Support

. P

.O

. Box 7706, Wichita. Kansas 67277, U

.S.A. (3 16) 517-5800, Facsi mile (316) 942 -9006 COPYRIGHT© 2007REFERENCES Model 172 Series 1996 and On Ma inten ance Man ual NOTE: Make sure all publications used are complete and current. NOTE: This information shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance Manual or Instructions for continued airworthiness and must be accomplished for ongoing airworthiness compliance as required per 14 CFR Part 43 .13.
OTHER PUBLI CATIONS AFFECTED Model 172R & Model 172S Illu strated Parts Catalog NOTE: Make sure all publications used are complete and current.
MATERIAL PRICE AND AVAILABILITY The parts below are available from Cessna Parts Distribution through an appropriate Cessna Service Station for the suggested list price shown.

Part Number 0500118-49 Description Fuel Line Assembly Qty /A irplane 1 (if required) Price $ 123.00 (S) ea
ALL PR ICES SUBJECT TO CHANGE WITHOUT NOTICE
CRE DIT INFORMATION A labor allowance credit of 0.8 man-hour per airplane will be provided to inspect the fuel return line assembly as described in th is Service Bulletin. If necessary, an additional 0.4 man-hour per airplane will be provided to repair the fuel return line assembly or an additional 0.3 man-hour per airplane will be provided to replace the fuel return line assembly as described in this Service Bulletin. Freight will be credited at the most economical method unless pre-approved by Cessna. For pre-approval contact Cessna Parts Distribution Warranty Administration at Telephone: 316-831-4296 , Fax: 316-206-2746 or E-mail: cpd2claims@cessna.textron.com

. To receive credit, the work must be completed and the Warranty Claim submitted by a Cessna Single Engine Service Station within 30 calendar days of Service Bulletin compliance before the credit expiration dates shown below. NOTE: Part number 0500118-49 fuel lines removed based on the inspection results of this Service Bulletin shall be held for field scrap per standard procedures. Domestic I nternationa l Special Note to Service Statio n s: June 18, 2008 June 18, 2008

When you complete the Warranty Claim, the labor allowance claimed shall be itemized for each above action completed.

Page 2 SB07-28-01 June 18, 2007

### A CCOMPLISHMENT INSTRUCTIONS We i ght A nd Balan ce In formatio n Negligible Materi al I nformat io n The part below may be necessary: DESCRIPTION OLD PI N

NEW P /N 0500118-49 QUA NTITY 

### 1 Fuel Line Assembly Same

I nstru ctions 1. Prepare the airplane for maintenance. A. Ma ke sure that all switches are in the O FF/NORM position. B. Disconnect electrical power from the ai rpl ane. ( 1) Disconnect the airplane battery. (2) Disconnect external electrical power. DISPOS ITION Refer to Credit Information Section.

C

. Attach maintenance warn ing tags to the battery and external power receptacle that have " DO NOT CONNECT ELE CTRICAL POWER
- MAINTENANCE IN PROGRESS" written on the m . 

### WARNING: IF THE A I RP LANE HAS AMSAFE INFLATABLE RESTRAINTS , DO NOT REMOVE SEA TS WITH THE SEAT BELTS BUCKLED OR THE ELECTRONICS MODULE ASSEMBLY ( EMA) CONNECTED

. DAMAGE TO THE SYSTEM CAN OCCUR AND AN ACCIDENTAL DEPLOYMENT OF THE SYSTEM CAN CAUSE INJURY. 2. Disarm the AMSAFE Inflatable Restraints. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 25, Inflatable Restraint System- Maintenance Practices.) 3. Get access to the 0500118-49 Fuel Return Line Assembly as follows : A. Remove the copilot's seat from the seat track and move it aft and away f rom the work area. (Refer to the Model172 Series 1996 and On Maintenance Manual, Chapter 25, Flight Compartment

- Maintenance Practices.) NOT E : You do not have to disconnect the seat belt from the copilot's seat. B. Remove the access panel (230BT) and the rudder pedal close-out pa nel below the co pi lot's rudder pedals. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 6, Access/Inspection Plates- Description and Operation.) 4. ( Refer to Figure 1, View A-A.) Do an inspecti on of the 0500118-49 Fuel Return Line Assembly as follows: A. With a flashlight and a mi rror, do an inspection of the 0500118-49 Fuel Return Line Assembly for damage i n the area of the MC0543022-2C Steeri ng Tube Assembly. (1) If there is no damage to the 0500118-49 Fuel Return Line Assembly, go to Step 9. (2) If there is damage to the 0500118-49 Fuel Return Line Assembly:

SB07-28-01 June 1 8, 2007 (a) Pull the fuel shutoff valve handle aft to shut off the fuel supply from the engine

. (b) Remove the 0500118-49 Fuel Return Line Assembly and install protective caps on the S2218-4 Check Valve , AN832
-4 Union at the firewall, and each end of the 0500118-49 Fuel Return Line Assembly.
Page 3(c) Make sure that there is only residual fuel leakage from the S2218-4 Check Valve after you disconnect the 0500118-49 Fuel Return Line Assembly. If there is more than residual fue l leakage, you must replace the S22 18-4 Check Valve. (Refer to the Model172 Series 1996 and On Maintenance Manual, Chapter 28, Fuel Storage and Distribution
- Maintenance Practices.) (d) Do an inspection of the damage on the 0500118-49 Fuel Return Line Assembly. 

## 1 If there is damage in the area of a bend radius of the line, you must rep lace the 0500118-49 Fuel Return Line Assembly. Go to Step 5

. 

## .f. If there is damage on the line of a depth of more than 0.0035 inch, or you cannot measure the depth of the damage, you must replace the 0500118-49 Fuel Return Line Assembly. Go to Step 5.**~** If there is damage on the l ine of a depth of 0.0035 inch or less and it is not in the area of a bend rad ius of the line, repair the damage to the 0500118-49 Fuel Return Line Assembly with blending procedures in accordance w ith FAA Advisory Circular 43.13-18 Acceptable Methods, Techniques , and Practices Aircraft Inspection and Repair. Then go to Step 5. 5. (Refer to Figure 1, View A-A.) Install the 0500118-49 Fuel Return Line Assembly as follows: A. Remove the protective caps from the 0500118-49 Fuel Return Line Assembly, S2218-4 Check Valve, and AN832-4 Union at the firewall. B. Hand tighten the B-nuts at the two ends of the 0500118-49 Fuel Return Line Assembly. C. Put the 0500118-49 Fuel Return Line Assembly in the position that gives correct clearance between the airplane structure and the MC0543022-2C Steering Tube Assembly when the rudder pedals and nosewheel move through the full left and right positions. D. Turn the nosewheel with a tow bar and move the copilot's rudder pedals at the same t ime while you look at the MC0543022-2C Steering Tube Assembly as it moves through its full range of motion. Make sure that the MC0543022-2C Steering Tube Assembly does not touch the 0500118-49 Fuel Return Line Assembly or the airplane structure. E. Hold the 0500118-49 Fuel Return Line Assembly in the correct position while you torque the B-nuts to 120 inch-pounds, +20 or -20 inch-pounds

. 6. Do a check to make sure that the 0500118-49 Fuel Return Line Assembly does not touch the right MC0543022-2C Steering Tube Assembly as follows: A. Turn the nosewheel with a tow bar and move the copilot's rudder pedals at the same time while you look at the MC0543022-2C Steering Tube Assembly as it moves through its full range of motion

. (1) If the 0500118-49 Fuel Return Line Assembly touches the right MC0543022-2C Steering Tube Assembly or the airplane structure, you must loosen the two B-nuts that attach the 0500118-49 Fuel Return Line Assembly and do Step 58 thru 5E again until the 0500118-49 Fuel Return Line Assembly does not touch the right MC0543022-2C Steering Tube Assembly or the airplane structure
. Go to Step 7. (2) If the 0500118-49 Fuel Return Line Assembly does not touch the right MC0543022-2C Steering Tube Assembly or the airplane structure, go to Step 7. 7. Push the fuel shutoff valve handle forward to the ON position. 8. Do a check for leaks at the 0500118-49 Fuel Return Line Assembly. 9. Install the access plate (230BT) and the rudder panel close-out panel. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 6, Access/Inspection Plates- Description and Operation.) 10. I nstall the copilot's seat. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 25, Flight Compartment
- Maintenance Practices .)
Page 4 SB07-28-01 June 18, 2007

### WARNING: FOLLOW ALL SAFETY PRECAUTIONS WHEN YOU WORK ON OR NEAR THE INFLATABLE RESTRAINT SYSTEM. THE INFLATOR ASSEMBLY IS A STORED , GAS/ENERGETIC MATERIAL DEVICE AND CAN CAUSE DAMAGE TO THE SYSTEM AND/OR INJURY TO PERSONNEL IF ACCIDENTALLY DEPLOYED 11. Arm the AMSAFE inflatable restraint systems, if installed

. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 25, Inflatable Restraint System
- Maintenance Practices.) 12. For airplanes with the AMSAFE inflatable restraint system , do an operationa l check of the seat belt system. (Refer to the AMSAFE Supplemental Maintenance Manual, part number E508804.) 13. Remove ma intenance warning tags from battery and external power receptacle and connect the battery. 14

. Make an entry in the airplane logbook that states compliance and method of compliance with this Service Bulletin

.

SB07-28-01 June 18, 2007 Page 5AE3663163E0240 Hose Assembly (Reference) 

## A Firewall (Reference) Fuel Shutoff Valve (Reference) Electrical Fuel Pump (Reference)

(NOTE) 

# L----MC0543022-2C Steering Tube Assembly (Reference) 0516009-24 Fuel Reservoir Assembly (Reference)

8-Nut AN832-4 0500118-49 Fuel Return Line Assembly (Reference) Line S2218-4 Assembly Union AN924-4 (Reference) Nut AN960-916L Washer (Reference) (1 If Required) Check Valve (Reference) (Reference) 

## .FWD VIEW 

## A-A Looking Down at Correct Installation

NOTE: Turn the nosewheel with a tow bar and move the copilot's rudder pedals

Page 6 at the same t i me while you look at the MC0543022-2C Steering Tube Assembly as it moves through its full range of motion to make sure it does not touch the 0500118-49 Fuel Return Line Assembly or the airplane structure. Figure 1. Fuel Return Line Inspection (Sheet 1) 051onoo1 AA051 6T0150

SB0?-28-0 1 June 18, 2007OWNER NOTIFI CA TION On June 18 , 2007 the following message will be sent to applicable owners of record in SB07-28-01A. Dear Cessna Owner: This Owner Advisory is to inform you that Service Bu lletin SB07-28-01: Fuel Return Line Inspection has been released. A report has been received that a part number 0500118-49 Fuel Return Line Assembly was found rubbing against the right steering tube assembly during full rudder pedal actuation. Service Bulletin SB0?-28-01 provides instructions to inspect the fue l return l ine fo r damage, and if necessary, repair or replace the line assembly

. Non-compliance with this Service Bulletin cou ld poten tially resul t in a fue l lea k. Compliance is mandatory: shall be accomplished at the next scheduled maintenance or inspection not to exceed 100 hours of operation or 12 months , whichever occurs first. The information contained in the referenced Cessna Service Bulletin shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance Manual or Instructions for continued airworthiness, and must be accomplished for ongoing airworthin ess compliance as required per 14 CFR Part 43.13. A labor allowance credit of 0.8 man-hour per airplane will be provided to inspect the fuel return line assemb ly as described in Service Bulletin SB0 ?-28-01. · If necessary, an additional 0.4 man-hour per airplane will be provided to repair the fuel return line assembly or an additional 0.3 man-hour per airplane will be provided to replace the fuel return line assembly as described in Service Bulletin SB07-28-01. To receive c redit, the work must be completed and the Warranty Claim submitted by a Cessna Single Engine Service Station with i n 30 calendar days of Service Bulletin compliance before the credit expiration dates shown below

. Domestic

......... .. .. .. .... .. June 18, 2008 I nternational

. . . . . . . . . . . . . . . . . . . June 18, 2008 Please contact a Cessna Single Engine Service Station for detailed information and arrange to have Cessna Service Bulletin SB07-28-01 accomplished on your ai rplane

.

SB07-28
-01 June 18 , 2007 

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