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Single Engine SERVICE BULLETIN Cessna A Textron Company SEB-28-01 TITLE
FUEL - FUEL RETURN LINE INSPECTION AND MODIFICATION
EFFECTIVITY
MODEL SERIAL NUMBERS 172R 17281573 thru 17281616 172S 172S11074 thru 172S11193 REASON Reports have been received that in some installations there may not be adequate clearance between the 0516031-1 Fuel Return Line Assembly and the right steering tube assembly during rudder pedal actuation.
DESCRIPTION This service bulletin provides parts and instructions to install brackets and clamps to make sure that there assembly. is adequate clearance between the 0516031-1 Fuel Return Line Assembly and the right steering tube
COMPLIANCE inspection. MANDATORY. This service bulletin must be accomplished at the next 100-hour or 12-month (annual-type) NOTE: SEB-28-01 supercedes SB11-28-03, Fuel Return Line Inspection. Airplanes that have not already accomplished SB11-28-03 must accomplish SEB-28-01 instead.
NOTE: Airplanes that have already accomplished SB11-28-03, Fuel Return Line Inspection, must now accomplish SEB-28-01 also.
APPROVAL Cessna received FAA approval for the technical data in this publication that changes the airplane type design.
Cessna received EASA approval for the technical data in this publication that changes the airplane type design.
WEIGHT AND BALANCE INFORMATION Negligible
REFERENCES Model 172 Series 1996 and On Maintenance Manual NOTE: Make sure all publications used are complete and current. Refer to cessnasupport.com.
NOTE: This information must 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 necessary in accordance with 14 CFR Part 43.13
PUBLICATIONS AFFECTED Model 172R & 172S Illustrated Parts Catalog SEB-28-01 September 21, 2012 Page 1 of 6 Cessna Aircraft Company, Cessna Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800, Fax 1-316-517-7271, Email: customercare@cessna.textron.com This document contains technical data and is subject to U.S. export regulations. This information has been exported from the United States in accordance with export administration regulations. Diversion contrary to U.S. law is prohibited. ECCN: 9E991 COPYRIGHT © 2012
Single Engine SERVICE BULLETIN Cessna A Textron Company SEB-28-01
ACCOMPLISHMENT INSTRUCTIONS
1. Prepare the airplane for maintenance.
A. Make sure that the airplane is electrically grounded.
B. Remove the upper and the lower engine cowl. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 71, Cowl - Maintenance Practices.)
C. Make sure that all switches are in the OFF/NORM position.
D. Disconnect electrical power from the airplane.
(1) Disconnect the airplane battery.
(2) Disconnect external electrical power.
Attach maintenance warning tags to the battery and external power receptacle that have "DO NOT CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" written on them.
WARNING: If the airplane has AMSAFE inflatable restraints, do not remove seats 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.
Remove the access panel (230CT) and the rudder pedal close-out panel below the copilot's rudder pedals. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 6, Access/Inspection Plates - Description and Operation.)
(Refer to Figure 1, Detail A.) Do an inspection of the 0516031-1 Fuel Return Line Assembly for damage as follows:
A. Pull the fuel shutoff valve handle aft to shut off the fuel supply to the engine.
B. Remove the 0516031-1 Fuel Return Line Assembly from the airplane and cap the lines, valve, and elbow.
C. Make sure that there is only residual fuel leakage from the S2218-4 Check Valve after you disconnect the 0516031-1 Fuel Return Line Assembly. If there is more than residual fuel leakage, you must replace the S2218-4 Check Valve. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 28, Fuel Storage and Distribution - Maintenance Practices.)
D. Do an inspection of the 0516031-1 Fuel Return Line Assembly.
(1) If there is no damage to the 0516031-1 Fuel Return Line Assembly, keep the serviceable 0516031-1 Fuel Return Line Assembly and go to Step 4.
If there is damage to the 0516031-1 Fuel Return Line Assembly, discard the damaged 0516031-1 Fuel Return Line Assembly and go to Step 4.
4. Begin the installation of the 0516031-1 Fuel Return Line Assembly as follows:
A. Remove the protective caps from the 0516031-1 Fuel Return Line Assembly, S2218-4 Check Valve, and AN833-4 Elbow at the firewall.
B. Put the aft S1486DG4U Clamp, S1021Z8-8 Screw, and 0516032-2 Bracket in position on the 0516031-1 Fuel Return Line Assembly.
C. Connect the 0516031-1 Fuel Return Line Assembly to the fuel line, and hand tighten the B-nuts at the two ends of the 0516031-1 Fuel Return Line Assembly.
D. Hand tighten the S1021Z8-8 Screw that attaches one S1486DG4U Clamp to the 0516032-1 Bracket and one S1486DG4U Clamp to the 0516032-2 Bracket.
Put the forward S1486DG4U Clamp in position on the 0516031-1 Fuel Return Line Assembly.
NOTE: With the 0516031-1 Fuel Return Line Assembly and the clamps loosely installed, you can better decide the exact location of the holes for the rivets that install the brackets.
SEB-28-01 Page 2 September 21, 2012
Single Engine SERVICE BULLETIN Cessna A Textron Company SEB-28-01
5. Install the 0516032-1 Bracket to the firewall as follows:
A. Put the 0516032-1 Bracket, with the S1486DG4U Clamp installed on it, in installation position on the firewall.
B. Make sure that you have visible positive clearance between the structure and the fuel return line assembly.
C. Match drill two No. 30(0.128-inch diameter) holes in the firewall to align with the holes in the 0516032-1 Bracket.
D. Deburr bare metal.
E. With two MS20615-4M5 Rivets, install the 0526032-1 Bracket on the firewall.
6. Install the 0516032-2 Bracket to the bulkhead as follows:
A. Put the 0516032-2 Bracket, with the S1486DG4U Clamp installed on it, in installation position on the bulkhead. Adjust the installation position of the clamp as necessary until there is sufficient edge distance between the rivet holes and any holes in the bulkhead.
B. Make marks where you will install the bracket. 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. Make sure that there is no less than a 0.5 inch clearance between the steering tube assembly and the fuel return line assembly through the full range of motion of the nose wheel steering. Before you drill the holes, you must make sure that there will be visible positive clearance between the structure and the fuel return line assembly after the installation.
C. Match drill two No. 30(0.128-inch diameter) holes in the Station 8.125 bulkhead to align with the holes in the 0516032-2 Bracket.
D. Deburr and apply Alodine to bare metal.
E. With two S2906-4-2 Rivets, install the 0516032-2 Bracket on the bulkhead.
7. Complete the installation of the 0516031-1 Fuel Return Line Assembly as follows:
A. Torque the B-nuts to 120 inch-pounds, +20 or -20 inch-pounds.
B. Tighten the two S1021Z8-8 Screws that attach the S1486DG4U Clamp to the 0516032-1 Bracket and the S1486DG4U Clamp to the 0516032-2 Bracket.
C. 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.
Make sure that there is no less than a 0.5 inch clearance between the steering tube assembly and the fuel return line assembly. Make sure that there is visible positive clearance between the structure and the fuel return line assembly.
8. Remove the maintenance warning tags and connect the airplane battery.
Push the fuel shutoff valve handle forward to the ON position.
10. Turn the electric boost pump on and do a check for leaks at the 0516031-1 Fuel Return Line Assembly.
11. Install the access plate (230CT) 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.)
12. Install the upper and the lower engine cowl. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 71, Cowl - Maintenance Practices.)
SEB-28-01 September 21, 2012 Page 3
Single Engine SERVICE BULLETIN Cessna A Textron Company SEB-28-01
13. Make an entry in the airplane logbook that states compliance and method of compliance with this service bulletin.
NOTE: This information must 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 necessary in accordance with 14 CFR Part 43.13.
SEB-28-01 Page 4 September 21, 2012
Single Engine SERVICE BULLETIN Cessna A Textron Company SEB-28-01 B18850 Firewall (Reference) AN833-4 Elbow AN960-916L Washer AN924-4 Nut (Reference)
1.70 0516031-1 Fuel Retur Line Assembly 0516032-1 (1 If Required) Bracket S1486DG4U (1 Required) Clamp S1021Z8-8 Screw Number 30 (1 Each Required) (0.128-Inch Diameter) Hole MS20615-4M5 Rivet (2 Each Required) Number 30
(0.128-Inch Diameter) Hole 0516032-2 Bracket Rivet S2906-4-2 (1 Required) (2 Each Required)
1.00 → STA 8.125 Bulkhead
- (Reference)
0.23 Minimum → S1486DG4U Clamp S1021Z8-8 Screw
- (1 Each Required)
DETAIL A NOTE: All dimensions are shown in inches. Looking Forward From Cabin A0516015DCN080 0510T1007 Figure 1. Fuel Return Line Modification (Sheet 1) SEB-28-01 September 21, 2012 Page 5
Single EngIne SERVICE BULLETIN Cessna A Textron Company SEB-28-01
MATERIAL INFORMATION Order the kit below to install this modification.
NEW P/N QUAN- KEY WORD OLD P/N INSTRUCTIONS/
TITY DISPOSITION SEB-28-01 1 Kit, consisting of the following parts:
MS20615-4M5 2 Rivet None None S1021Z8-8 2 Screw None None S1486DG4U 2 Clamp None None S2906-4-2 2 Rivet None None 0516032-1 1 Bracket None None 0516032-2 Bracket None None SEB-28-01 1 Instructions The parts that follow may also be necessary:
NEW P/N QUAN- KEY WORD OLD P/N INSTRUC-
TITY TIONS/ DISPO- SITION S2218-4 1 Check Valve Same Discard 0516031-1 1 Fuel Return Line Same Discard Assembly SEB-28-01 Page 6 September 21, 2012
Single Engine OWNER ADVISORY Cessna A Textron Company SEB-28-01 TITLE
FUEL - FUEL RETURN LINE INSPECTION AND MODIFICATION TO:
Cessna 172 Owner REASON This owner advisory is to inform you that SEB-28-01 has been issued.
Reports have been received that in some installations there may not be adequate clearance between the 0516031-1 Fuel Retur Line Assembly and the right steering tube assembly during rudder pedal actuation.
SEB-28-01 provides parts and instructions to install brackets and clamps to make sure that there is adequate clearance between the 0516031-1 Fuel Return Line Assembly and the right steering tube assembly.
COMPLIANCE MANDATORY. This service bulletin must be accomplished at the next 100-hour or 12-month (annual-type) inspection.
NOTE: SEB-28-01 supercedes SB11-28-03, Fuel Retur Line Inspection. Airplanes that have not already accomplished SB11-28-03 must accomplish SEB-28-01 instead.
NOTE: Airplanes that have already accomplished SB11-28-03, Fuel Return Line Inspection, must now accomplish SEB-28-01 also.
LABOR HOURS
2.0 man-hours to accomplish this service bulletin
WARRANTY For airplanes in warranty and identified within the serial effectivity:
Applicable parts credit and a labor allowance credit of 2.0 man-hours per airplane will be provided to accomplish this service bulletin Freight will be credited at the most economical method unless pre-approved by Cessna. For pre-approval contact Cessna Service Parts and Programs 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 a warranty claim submitted by a Cessna Single-Engine Authorized Service Facility within 30 calendar days of service bulletin compliance before the credit expiration dates shown below.
Domestic September 21, 2013 International September 21, 2013 Please contact a Cessna Single-Engine Authorized Service Facility for detailed information and arrange to have Cessna Service Bulletin SEB-28-01 accomplished on your airplane.
SEB-28-01 September 21, 2012 Page 1 of 2 Cessna Aircraft Company, Cessna Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800, Fax 1-316-517-7271, Email: customercare@cessna.textron.com This document contains technical data and is subject to U.S. export regulations. This information has been exported from the United States in accordance with export administration regulations. Diversion contrary to U.S. law is prohibited. ECCN: 9E991 COPYRIGHT © 2012
Single Engine OWNER ADVISORY Cessna A Textron Company SEB-28-01 Special Note to Authorized Service Facilities:
When you complete the warranty claim, the labor allowance claimed shall be itemized for each above action completed.
NOTE: As a convenience, service documents are now available online to all our customers through a simple, free-of-charge registration process. If you would like to sign up, please visit the "Customer Access" link at www.cessnasupport.com to register.
SEB-28-01 Page 2 September 21, 2012