GE PROPRIETARY INFORMATION

The information contained in this publication is GE proprietary information and is disclosed in confidence. It is t he property of GE and shall not be used, disclosed to others or repro duced without the express written consent of GE, including, but witho ut limitation, it is not to be used in the creation, manufacture, dev elopment, or derivation of any repairs, modifications, spare par ts, designs, or configuration changes or to obtain FAA or any other government or regulatory approval to do so. If consent is given f or reproduction in whole or in part, this notice and the notice set fo rth on this media shall appear in any such reproduction in whole or i n part. This technical data is considered ITAR and/or EAR contro lled pursuant to 22 CFR Part 120-130 and 15 CFR Parts 730-774 respec tively. Transfer of this data by any means to a Non-U.S. Person, whe ther in the United States or abroad, without the proper U.S. Governmen t authorization (e.g., License, exemption, NLR, etc.), is strictly prohibited.

All technical documentation and information contain ed herein, with respect to assembly and disassembly, cleaning, insp ection methods and limits, repair methods and limits, operational limi ts, life limits and the like, have been developed and approved for use with engines and parts that have been manufactured and/or approv ed by GE and that have been maintained in accordance with GE technica l documentation and recommendations. GE has no contractual or legal obligation for, nor knowledge of, non-GE-approved parts and repairs . Accordingly, this documentation is not intended to apply to non- GE-approved parts and repairs.

Copyright (2001) General Electric Company, U.S.A.

TRANSMITTAL INFORMATION ENGINE Service Bulletin 73

- 0231 Revision 2
GE PROPRIETARY INFORMATION The information contained in this document is GE pr oprietary information and is disclosed in confidence. It is t he property of GE and shall not be used, disclosed to others or repro duced without the express written consent of GE, including, but witho ut limitation, it is not to be used in the creation, manufacture, dev elopment, or derivation of any repairs, modifications, spare par ts, design, or CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 1 of 10configuration changes or to obtain FAA or any other government or

regulatory approval to do so. If consent is given f or reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such repr oduction in whole or in part. The information contained in this docum ent may also be controlled by U.S. export control laws. Unauthorize d export or reexport is prohibited. Copyright (2001) General Electric Company, U.S.A. This section transmits Revision 2 to ENGINE S/B 73- 0231, dated May 24, 1995. Revision 1 was dated May 03, 1999. This revision is issued to add a CAUTION statement to paragraph 3. ACCOMPLISHMENT INSTRUCTIONS. Also, washers are dele ted and shorter bolts incorporated to achieve commonality with adja cent fuel tube flange fastener hardware. Engines that have previously complied with this Ser vice Bulletin are not affected. The FAA has approved the technical content of this Service Bulletin. The revision bars in the left margin identify chang es. This service bulletin is reissued in its entirety. GEAE Distribution Code: 843 1. PLANNING INFORMATION A. Effectivity * * * CF6-80C2A1/A2/A3/A5/A8/A5F/B1/B2/B4/B6/B1F/B2 F/B4F/B6F/B7F/D1F (1) Main engine control (MEC) to flowmeter fuel tube 1334M88G01 on CF6-80C2A1/A2/A3/A5/A8/B1/B2/B4/B6 (PMC) engines , and forward hydromechanical unit (HMU) to flowmeter fue l tube 1383M12G01 and aft HMU to flowmeter fuel tube 1374M 30G01 on CF6-80C2A5F/B1F/B2F/B4F/B6F/B7F/D1F (FADEC) engines , or stocked as spares are affected. (2) MEC to flowmeter fuel tube 1334M88G03 will be in troduced in production on the CF6- 80C2A1/A2/A3/A5/A8/B1/B2/B4/B6 engines listed below: 690-370 and higher (except -900 and -901), and 695- 667 and higher. (3) Forward HMU to flowmeter fuel tube 1383M12G02 and aft HMU to flowmeter fuel tube 1374M30G03 will be introduced i n production on the CF6-80C2A5F/B1F/ B2F/B4F/B6F/B7F/ D1F engines listed below: 703-193 and higher, 704-276, -278 thru -281, -283 a nd CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 2 of 10higher, and 705-233 and higher.

(4) These serial numbers are the best available data

. B. Description Fuel tubes with improved four-bolt swivel retaining tube flanges are identified. Instructions for replacemen t are provided. C. Compliance Category 3 GE recommends that you do at next shop visit of eng ine or when old tube is disconnected for on-wing maintenance. This Service Bulletin is offered to improve the rel iability or performance of your GE product, or to prevent the o ccurrence of the event or condition described in this Service Bulletin. If the operator elects not to participate in the bu lletin, that decision will be taken into consideration by G E in evaluating future product performance issues that m ay arise in the operator's fleet.
D. Reason (1) Objective: REDUCE SIGNIFICANT EVENTS - IN-FLIGHT SHUTDOWNS/ABO RTED TAKEOFFS Make the fuel tubes more reliable. (2) Condition: A swivel flange (figure 1 and figure 2) on the old tube may hang up on the tube ferrule and cause a significant fuel leak. Since the original of this Service Bulletin i ssued, several old tubes have leaked after maintenance and caused aborted takeoffs and in-flight shutdowns. (3) Cause: The geometry of the old tubes does not prevent hang ups of swivel flanges on tube ferrules. (4) Improvement: The new flanges are chamfered and self-centering t o avoid

hang ups on the ferrule. Also, washers are deleted and shorter bolts incorporated to achieve commonality w ith adjacent fuel tube flange fastener hardware. Substantiation:

A graphical computer model and calculations verify that the interferences are eliminated. CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 3 of 10A similar flange has been used on similar applicati ons.

E. Approval Paragraph 3., ACCOMPLISHMENT INSTRUCTIONS, of this Alert

Service Bulletin is approved by the Manager of the Engine Certification Office, ANE-140, by letter dated July 31, 2001, as an alternate method of compliance to paragraph ( a)(2) and (a)(3) of Airworthiness Directive 2000-04-14. F. Manpower After you get access to the accessory gearbox assem bly, you will need approximately 0.5 man-hours for each engi ne. G. Weight and Balance Weight and balance are not changed.
H. References CF6-80C2 Engine Manual, GEK 92451 CF6-80C2A (PMC) Series Illustrated Parts Catalog (I PC), GEK 92452-1 CF6-80C2A (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-5 CF6-80C2B (PMC) Series Illustrated Parts Catalog (I PC), GEK 92452-2 CF6-80C2D (FADEC) Illustrated Parts Catalog (IPC), GEK 92452-3 CF6-80C2B (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-4

NOTE: The reference documents listed below are for the en gine manufacturer's internal use only: CID: 346721, 346819, 346854, 349076 I. Publications Affected CF6-80C2A (PMC) Series Illustrated Parts Catalog (I PC), GEK 92452-1 CF6-80C2A (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-5 CF6-80C2B (PMC) Series Illustrated Parts Catalog (I PC), GEK 92452-2 CF6-80C2D (FADEC) Illustrated Parts Catalog (IPC), GEK 92452-3 CF6-80C2B (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-4 J. Interchangeability Replace the old tubes with the new tubes to reduce the CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 4 of 10possibility of fuel leaks.

On CF6-80C2A1/A2/A3/A5/A8/B1/B2/B4/B6 engines, do n ot mix old and new parts. Use the new bolt with the new fuel t ube at the MEC. On CF6-80C2A5F/B1F/B2F/B4F/B6F/B7F/D1F engines, the old and new tubes are interchangeable. K. Disposition of Parts Replace old parts. 2. MATERIAL INFORMATION A. Material

- Price and Availability (1) Parts necessary to do this Alert Service Bulleti n:
Part Number Qty/Eng Part Name Unit Price ($) Pkg Qty Lead time Days For CF6-80C2A1/ A2/A3/A5/A8/ B1/B2/B4/B6 (PMC) engi nes: J221P217 (1) Packing, Preformed 2.05 (25) 30 J219P05 (1) Gasket - Seal 19.00 (10) 30
1334M88G03 (1) Tube, Fuel-MEC to Flowmeter 991.00 (1) 30

MS9557-10 (8) Bolt * -- --

For CF6-80C2B1F/B2F/B4F/B6F/B7F/D1F/A5F (FADEC) eng ines: J221P217 (1) Packing, Preformed 2.05 (25) 30 J219P05 (2) Gasket - Seal 19.00 (10) 30
1383M12G02 (1) Tube, Fuel - HMU to Flowmeter, Fwd 655.00 (1) 30

1374M30G03 (1) Tube, Fuel - HMU to Flowmeter, Aft 1648.00 (1) 30

* GE Engine Services Distribution, L.L.C., does not sell these parts.

NOTE: Prices can change. (2) Future spare parts: Refer to paragraph 2.A.(1). (3) Consumables:
None. B. Industry Support Information CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 5 of 10(1) Material

GE Engine Services Distribution, L.L.C., will give you an up-front 50 percent parts discount, if this Alert S ervice Bulletin is done per the recommended technical comp liance. Refer to paragraph 2.A.(1). To get the allowance, s end a charge Purchase Order before December 31, 2002 (the Purchase Order must include the list of parts and the number of this Alert Service Bulletin) to: ATTN: Customer Account MangerGE Engine Services Distribution, L.L.C.One Neumann WayRoom 115Cincinna ti, OH 45215-1988 USA C. Configuration Chart Configuration Chart
New Part Number Qty/Eng Part Name Old Part Number/IPC Location Qty/Eng OPCode

(PRODUCTION OR FIELD)
9255M28G01 thru G09 (1) Assembly, Accessory DriveCF6- 80C2A1/A2/A3/ A5/A8/B1/B2/ B4/B6 9255M28G01 thru G09 (1) RM

.1334M88G03 (1) Tube, Fuel - MEC to Flowmeter .1334M88G01 73-00-00-05- 060 (1) RE

.MS9557-10 (8) Bolt MS9557-12 73-00-00-05- 170 (8) RE

-----------

---- (-) Washer .AN960C41673- 00-00-05-175 (8) DE

9255M79G01 thru G03 (1) Assembly, Accessory DriveCF6- 80C2B1F/B2F/ B4F/B6F/B7F/D1F/A5F 9255M79G01 thru G03 (1) RM

.1383M12G02 (1) Tube, Fuel - MEC to Flowmeter, Forward .1383M12G01 73-00-00-07- 005 (1) RE

.1374M30G03 (1) Tube, Fuel - MEC to Flowmeter, Aft .1374M30G01 73-00-00-07- 081 (1) RE

Change Codes CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 6 of 102 = Two-way interchangeable. 3 = Not interchangeable. 5 = Qualified interchangeability - parts deleted. Spare Parts Support Code A = Old parts will no longer be supplied. E = Old parts will be supplied, and can be used at other engine locations. Operation Codes RM = Remains RE = Replace DE = Delete D. Tooling

- Price and Availability
None. 3. ACCOMPLISHMENT INSTRUCTIONS

WARNING: DO NOT USE AVIATION TURBINE FUEL (JET FUEL) NEAR FL AMES OR HEAT, BECAUSE

THIS FUEL IS VERY FLAMMABLE. DO NOT LET THE FUEL ST AY ON YOUR BODY OR CLOTHES. THIS FUEL IS DANGEROUS TO YOUR SKIN AND EY ES. DO NOT BREATHE THE FUMES RELEASED FROM THIS FUEL. MAKE SURE YOU HAVE A GOOD FLOW OF AIR. THESE FUMES ARE DANGEROUS TO YOUR LUNGS, CAN GIVE YOU A H EADACHE, AND CAN MAKE YOU SICK.
CAUTION: WHEN INSTALLING OR REPLACING THE FUEL FLOWMETER TUB ES OR REPLACING THE SEAL

GASKET (J219P05) THE FOLLOWING ASSEMBLY PROCEDURE S HOULD BE FOLLOWED TO AVOID POTENTIAL HIGH PRESSURE FUEL LEAKS: A. For CF6-80C2A1/A2/A3/A5/A8/B1/B2/B4/B6 engines, replace the

MEC to flowmeter fuel tube 1334M88G01 (figure 1). (1) Use a suitable container to catch fuel. Remove four bolts

and washers at each end of the MEC to flowmeter fue l tube.

NOTE: Brackets and/or spray shields of various configurat ions may be retained by the bolts for the MEC to flowmeter fuel tube. Du ring removal, note the orientations of these parts and reinstall them in the same orientations. (2) Remove MEC to flowmeter fuel tube 1334M88G01. (3) Clean flange surfaces to make sure no debris is present. (4) Inspect seal gasket prior to installation to make s ure no

nicks or tears exist on the O-ring seal. (5) Lightly lubricate seals with engine oil (02 C-0 19). (6) Replace one preformed packing J221P217 and one seal

gasket (J219P05) and install MEC to flowmeter fuel tube 1334M88G03 (7) Install four bolts MS9557-10 to a finger tight condition,

without washers, to attach the MEC to flowmeter fue l tube CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 7 of 10to the fuel flowmeter. (8) Install four bolts MS9557-10 to a finger tight condition,

without washers, to attach the MEC to flowmeter fue l tube to the MEC. (9) Center four bolt swivel flange around tube end ferrule. (10) Torque eight bolts to 55-70 lb in. (6.2-7.9 N. m) in a

diagonal pattern to ensure proper seating of the ga sket. Go to step C. B. On CF6-80C2A5F/B1F/B2F/B4F/B6F/B7F/D1F engines, replace the

forward HMU to flowmeter fuel tube 1383M12G01 and t he aft HMU to flowmeter fuel tube 1374M30G01 (figure 2).

NOTE: During removal, note the orientations of nuts, bolt s, washers, brackets and spray shields and reinstall them in the same or ientations during assembly. (1) Use a suitable container to catch fuel. Remove four nuts,

twelve bolts, and four washers that secure the two tubes. Remove the tubes. (2) Remove forward HMU to flowmeter fuel tube 1383M 12G01 and

AFT HMU to flowmeter tube 1374M30G01. (3) Clean flanges to ensure no debris is present. (4) Inspect seal gasket prior to installation to make s ure no

nicks or tears exist on the O-ring seal. (5) Lightly lubricate seals with engine oil (C02-01 9 ). (6) Replace one preformed packing J221P217 and two seal

gaskets J219P05, and install the new tubes. (7) Install all fasteners to a finger tight conditi on. (8) Center four bolt swivel flanges around tube end ferrule. (9) Torque flange bolts to 55-70 lb in (6.2-7.9 N.m ) in a

diagonal pattern to ensure proper seating of the ga sket. C. Do an idle leak check. Refer to the Aircraft Mai ntenance

Manual, 71-00-00. CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 8 of 10MEC to Flowmeter Fuel Tube on PMC Engines Figure 1 CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 9 of 10HMU to Flowmeter Fuel Tubes on FADEC Engines Figure 2 CF6-80C2 Alert Service Bulletin No 73- A0231 R02 Revised: 08/01/2001 Issued: 05/24/1995
SB 73-A0231 R02 ENGINE FUEL AND CONTROL - Fuel Tube s (72-00-05) - Swivel Retaining Tube Flanges

Date Printed: Jun 25, 2012 GE PROPRIETARY INFORMATION - Not to be used, disclo sed to others or

reproduced without the express written consent of G E. Technical data is considered ITAR and/or EAR controlled; transfer of this data to a Non

- US Person, without USG authorization, is strictly p rohibited. Page 10 of 10