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t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement
GE PROPRIETARY INFORMATION The information contained in this document is GE proprietary information and is disclosed in confidence. It is the property of GE and shall not be used, disclosed to others or reproduced without the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modifications, spare parts, designs, or configuration changes or to obtain FAA or any other government or regulatory approval to do so. If consent is given for reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such reproduction in whole or in part. The information contained in this document may also be controlled by U.S. export control laws. Unauthorized export or re-export is prohibited.
All technical documentation and information contained herein, with respect to assembly and disassembly, cleaning, inspection methods and limits, repair methods and limits, operational limits, life limits and the like, have been developed and approved for use with engines and parts that have been manufactured and/or approved by GE and that have been maintained in accordance with GE technical documentation and recommendations. GE has no contractual or legal obligation for, nor knowledge of, non-GE-approved parts and repairs. Accordingly, this document is not intended to apply to non-GE-approved parts and repairs.
Copyright (2007) General Electric Company, U.S.A.
May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 1 of 25
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement
TRANSMITTAL INFORMATION REVISION 1 TO SERVICE BULLETIN 73-0242 Revision 1 is issued to update the Effectivity and the Compliance paragraphs. Compliance of this S/B is changed from Category 7 to Category 3. This S/B simplifies the complexity of the spray shields which can be misassembled and result in a fuel leak.
The original was issued May 17, 1996. Revision bars in the left margin identify changes.
1. PLANNING INFORMATION A. Effectivity CF6-80C2A1/A2/A3/A5/A5F/A8/B1/B1F/B2/B2F/B4/B4F/B6/B6F/B7F/D1F
(1) The old integrated drive generator (IDG) cooler bracket 1321M88P001A, spray shield bracket 1577M93G05, spray shields 1606M57G01, 1517M22G03/G06, 1883M59G01, 1582M85G01, and 1775M61G01, electrical lead PMUX bracket 1383M66P001A, fuel supply angle bracket 1374M58G05, support bracket 1885M52P001A, and 1468M19P001A installed on CF6-80C2 engines or stocked as spares are affected.
(2) The new support bracket 1883M61G01 and electrical lead PMUX bracket 1883M63G01 will be introduced in production on engines 695-676 and higher.
The new support bracket 2021M83G01, and spray shield 1883M60G01 will be introduced in production on the engines listed below:
695-676 and higher, 703-197 and higher, 704-334 thru -338, -340 thru -378 and -380 and higher, 705-239 and higher.
The new spray shield 1883M59G01 will be introduced in production on the engines listed below:
704-334 thru -338, -340 thru -363, 705-239 thru -243.
The new spray shield 1977M20G01 will be introduced in production on the engines listed below:
695-676 and higher, 703-197 and higher, 704-364 thru -378, -380 and higher, 705-244 and higher.
The new support bracket 1885M52P001A will be introduced in production on the engines listed below:
704-334 thru -338, -340 thru -369, 705-239 thru -243.
The new support bracket 1977M27P001A will be introduced in production on the engines listed below:
703-197 and higher, 704-370 thru -378, and -380 and higher, 705-244 and higher.
May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 2 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement NOTE: Some full authority digital engine control (FADEC) engines have new support bracket 1885M52P001A and spray shield 1883M59G01 installed. These parts can be removed and reworked or replaced.
Refer to paragraph 3.A.
(3) These serial numbers are the best available data.
B. Reason
(1) Objective:
Improve the maintainability of the IDG fuel-oil cooler. Improve the inspection of the IDG fuel-oil cooler and flowmeter tubing swivel flanges.
(2) Condition:
(a) The IDG fuel-oil cooler is mounted to a bracket and spray shield with the same bolts that attach the tubing four bolt swivel flange. On FADEC engines, an additional bracket use these same bolts.
(b) The old spray shields covers the circumference of the tubing swivel flanges attached to the fuel-oil cooler and the transmitter flowmeter. This condition does not allow proper inspection of the swivel flange seating.
(c) The first new spray shield, at the forward end of the flowmeter, may interfere with boltheads at the end of the flowmeter.
(d) The first new support bracket, at the forward end of the fuel-oil cooler, does not have a customer interface hole required for EBU installation on D1F and A5F engines.
(3) Cause:
(a) The multiple sheet metal stackup of three parts increases the difficulty in alignment during bolt installation.
(b) Circumferential coverage of the old spray shields prevent mechanics from properly inspecting the seating of the tubing swivel flanges.
(c) The boltheads on the flowmeter were not included on the digital mockup.
(d) Changes made by Rohr to attach a bracket to the new GE support bracket were not coordinated with GE.
(4) Improvement:
(a) The new parts integrate the function of both the bracket and spray shield into one part. On FADEC engines, the additional bracket also integrates a small angle bracket and is bolted to the new bracket with separate bolts and nuts.
(b) The lower portion of the spray shield is trimmed away to provide improved inspection access to the swivel flange. This area of the shield May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 3 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement is unnecessary because the fuel streaks, from this area, do not go up beyond the shield.
(c) Washers were added between the first new spray shield and the tube flange to provide clearance between the spray shield and the boltheads.
The second new shield has a axial width of 0.12 inch (3.05 mm) less than the first new shield. The first shield can be reworked to the second shield dimensions. The shield at the forward end of the flowmeter is also changed to maintain commonality.
(d) The second new support bracket has the customer interface hole added. The first new bracket can be reworked to the second bracket configuration by drilling a hole. The second new bracket is released to all Boeing engines for commonality purposes.
(5) Substantiation:
(a) Structural integrity of the new support bracket is similar to 4 the old cooler bracket. The only difference is that the new bracket is made of two pieces with one welded side. The old bracket is made of one piece with bent and welded sides. The old FADEC angle bracket is installed using three bolts on the tube swivel flange. The new bracket is attached to the new support bracket with three separate bolts and nuts. The new configuration does not change the load path. A small angle bracket is bolted to the old bracket but is now an integral part of the new bracket and does not change the load path.
(b) The coverage area of the new spray shields has been verified visually on a mockup engine and will cover the area sufficiently to prevent leaked fuel steaks from going beyond the heat shield.
(c) A stackup analysis showed that the addition of the washer provides adequate clearance between the first new spray shield and the flowmeter boltheads. The second new spray shield is 0.12 inch
(3.05 mm) less in axial width than the first new shield and will prevent interference without the washer required with the first new shield. The reduction in width will not change the function of the shield.
(d) The second new bracket is the same as the first except for the addition of a hole. This change does not affect the vibratory response of the bracket.
May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 4 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement C. Description
(1) The introduction of the new support bracket simplifies the installation of the fuel-oil cooler. This improves the maintainability and eliminates the possibility of misassembly.
(2) The new spray shields on the fuel-oil cooler and flowmeter provide better spray protection and inspection of tubing swivel flange seating.
(3) Washers are required between the first spray shield and the tube swivel flange to provide clearance between the spray shield and boltheads on the flowmeter.
The second new spray shield will eliminate the possible interference and eliminate the need for the washers required with the first shield.
(4) The second new bracket is required to provide customer interface holes for EBU installation on D1F and A5F engines. This new bracket is released to all FADEC engines for commonality purposes.
D. Compliance T echnical Compliance Category 3 GE recommends that you do this Service Bulletin at the next shop visit of the engine.
NOTE 1: This Service Bulletin can be accomplished on wing or in shop.
NOTE 2: Do this Service Bulletin after CF6-80C2 S/B 73-0224.
E. Approval The FAA has approved the technical content of this Service Bulletin.
F. Manpower After you get access to the accessory drive area, you will need approximately 1 man-hour for each engine.
G. Material Obtain the necessary parts from GE Aircraft Engines. Refer to paragraph
2.A., Material - Price and Availability.
H. Tooling None.
I. Weight and Balance Parts introduced by this Service Bulletin decreases weight by 0.31 lb (0.14 kg) at approximate Engine Station 230 inches (5842 mm).
May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 5 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement J. References (Use the latest version of these documents) Commercial Engine Standard Practices Manual (SPM), GEK 9250 CF6-80C2 Engine Manual (EM), GEK 92451 CF6-80C2A (PMC) Series Illustrated Parts Catalog (IPC), GEK 92452-1 CF6-80C2A (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-5 CF6-80C2B (PMC) Series Illustrated Parts Catalog (IPC), GEK 92452-2 CF6-80C2D (FADEC) Illustrated Parts Catalog (IPC), GEK 92452-3 CF6-80C2B (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-4 CF6-80C2 S/B 73-0224 FUEL AND CONTROL - Flowmeter to IDG Cooler Fuel Tube NOTE: The reference documents listed below are for the engine manufacturers internal use only:
CID: 346865, 346997, 347204, 347224, 347254 K. Publications Affected CF6-80C2 Engine Manual (EM), GEK 92451 72-00-05 CF6-80C2A (PMC) Series Illustrated PartsCatalog (IPC), GEK 92452-1 72-00-05, 73-00-00 CF6-80C2A (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-5 72-00-05, 73-00-00 CF6-80C2B (PMC) Series Illustrated Parts Catalog (IPC), GEK 92452-2 72-00-05, 73-00-00 CF6-80C2D (FADEC) Illustrated Parts Catalog (IPC), GEK 92452-3 72-00-05, 73-00-00 CF6-80C2B (FADEC) Series Illustrated Parts Catalog (IPC), GEK 92452-4 72-00-05, 73-00-00, 73-11-20 L. Previous Modifications None.
2. MATERIAL INFORMATION A. Material - Price and Availability
(1) Parts necessary to do this Service Bulletin:
Part Number Qty/ Eng Part Name Unit $ Price Pkg Qty Lead Time Days For CF6-80C2A1/A2/A3/A5/A8/B1/B2/B4/B6 engines:
2021M83G01 (1) Bracket, Support 177.50 (1) 30 MS9557-10 (8) Bolt, Machine *( - ) -- 1883M60G01 (1) Shield, Spray 179.25 (1) 30 1977M20G01 (1) Shield, Spray 176.75 (1) 30 May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 6 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement Part Number Qty/ Eng Part Name Unit $ Price Pkg Qty Lead Time Days 1883M61G01 (1) Bracket, Support 176.75 (1) 30 For CF6-80C2B1/B2/B4/B6 engines only:
1883M63G01 (1) Bracket, PMUX 99.25 (1) 30 For CF6-80C2B1F/B2F/B4F/B6F/B7F/A5F/D1F engines:
2021M83G01 (1) Bracket, Support 177.50 (1) 30 1977M27P001A (1) Bracket, Support 101.00 (1) 30 MS9557-10 (8) Bolt, Machine *( - ) -- MS9557-06 (3) Bolt, Machine *( - ) -- MS21043-4 (3) Nut, Self-locking * (-) -- 1883M60G01 (1) Shield, Spray 179.25 (1) 30 1977M20G01 (2) Shield, Spray 176.75 (1) 30 *GE Aircraft engines does not sell these parts.
NOTE 1: Prices can change.
NOTE 2: When dealing directly with the supplier, make sure that the supplier has complied with appropriate Airworthiness Authority Regulations.
(2) Other Spare Parts:
None.
(3) Consumables:
Code Number Discription C04-003 Solvent, Acetone C05-002 Ink, Marking (Dykem) May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 7 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement B. Configuration Chart New Part Number Qty/ Eng Part Name Old Part Number/ IPC Location Qty/ Eng Op Code Chg/ Sprt Code (PRODUCTION OR FIELD) 9255M28G01/ G02/G03/G04/ G05/G06/G07/ G08/G09 (X) Accessory Drive Assy CF6-80C2A1/ A2/A3/A5/A8/ B1/B2/B4/B6 9255M28G01/ G02/G03/G04/ G05/G06/G07/ G08/G09 (X) RM -/- .2021M83G01 (1) Bracket - IDG Cooler (Old name) Bracket, Support (New name) .1321M88P001A 72-00-05-01-230
(1) RE 5/A -- (-) Shield, Spray .1606M57G01 73-00-00-05-250A
(1) DE 5/A .MS9557-10 (3) Bolt, Machine .MS9557-12 73-00-00-05-100
(3) RE 5/E -- (-) Washer, Flat .AN960C416 73-00-00-05-110
(3) DE 5/E .MS9557-10 (1) Bolt, Machine .MS9557-12 73-00-00-05-105A
(1) RE 5/E -- (-) Washer, Flat .AN960C416 73-00-00-05-115
(1) DE 5/E .1883M60G01 (1) Bracket, Spray Shield (Old name) Shield, Spray (New name) .1577M93G05 72-00-05-01-265
(1) RE 2/A .MS9557-10 (1) Bolt, Machine .MS9557-12 73-00-00-05-130
(1) RE 5/E -- (-) Washer, Flat .AN960C416 73-00-00-05-140
(1) DE 5/E .MS9557-10 (3) Bolt, Machine .MS9557-12 73-00-00-05-135
(3) RE 5/E -- (-) Washer, Flat .AN960C416 73-00-00-05-145
(3) DE 5/E .1883M59G01 (1) Shield, Spray 1517M22G06 73-00-00-05-078A
(1) RE 2/A .1977M20G01 (1) Shield, Spray 1883M59G01 S/B 73-0242
(1) RE 1/A May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 8 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement New Part Number Qty/ Eng Part Name Old Part Number/ IPC Location Qty/ Eng Op Code Chg/ Sprt Code .1883M61G01 (1) Shield, Spray (Old name) Bracket, Support (New name) 1582M85G01 73-00-00-05-064
(1) RE 5/A 9255M28G02/ G05/G06/G07 (X) Accessory Drive Assy CF6-80C2B1 /B2/B4/B6 9255M28GO2/ G05/G06/G07 (X) RM -/- .1883M63G01 (1) Bracket, PMUX Elec Lead .1383M66P001A 72-00-05-01-855
(1) RE 5/A 9255M79G01/ G02/G03/G04/ G05/G06 (X) Accessory Drive Assy CF6-80C2 B1F/B2F/B4F/ B6F/B7F/A5F/D1F 9255M79G01/ G02/G03/G04/ G05/G06 (X) RM -/- .2021M83G01 (1) Bracket - IDG Cooler (Old name) Bracket, Support (New name) .1321M88P001A 72-00-05-02-120
(1) RE 5/A .1885M52P001A (1) Bracket, Angle - Fuel Supply (Old name) Bracket, Support (New name) .1374M58G05 72-00-05-02-118A
(1) RE 5/A -- (-) Shield, Spray .1775M61G01 73-00-00-07-255A
(1) DE 5/- -- (-) Shield, Spray .1606M57G03 73-00-00-07-255B (ALT) DE 5/- .1883M60G01 (1) Bracket, Spray Shield (Old name) Shield, Spray (New name) .1577M93G05 73-00-00-07-170
(1) RE 2/A .MS9557-10 (4) Bolt, Machine .MS9557-12 73-00-00-07-047
(4) RE 5/E -- (-) Washer, Flat .AN960C416 73-00-00-07-053
(4) DE 5/E .MS9557-10 (4) Bolt, Machine .MS9557-13 73-00-00-07-065
(4) RE 5/E .1883M59G01 (2) Shield, Spray .1517M22G03 72-00-05-02-077
(2) RE 5/A .1977M20G01 (2) Shield, Spray .1883M59G01 S/B 73-0242
(2) RW/ RE 5/A May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 9 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement New Part Number Qty/ Eng Part Name Old Part Number/ IPC Location Qty/ Eng Op Code Chg/ Sprt Code .AN960C416 (3) Washer, Flat -- (-) AD 5/- -- (-) Washer, Flat AN960C416 (3) DE 5/E .MS9557-06 (3) Bolt, Machine -- (-) AD 5/- .MS21043-4 (3) Nut, Self-Locking -- (-) AD 5/- 9255M79G01/ G04/G05/G06/ (X) Accessory Drive Assy CF6-80C2B1F/ B2F/B4F/B6F/B7F 9255M79G01/ G04/G05/G06 (X) RM -/- .1977M27P001A (1) Bracket, Support .1885M52P001A S/B 73-0242
(1) RW/ RE 2/B -- (-) Bolt, Machine .MS9556-06 73-11-20-01-550
(2) DE 5/E -- (-) Nut, Self-Locking .MS21043-3 73-11-20-01-560
(2) DE 5/E -- (-) Bracket Angle, .1468M19P001A 73-11-20-01-570
(1) DE 5/A 9255M79G02/ G03 (X) Accessory Drive Assy CF6-80C2A5F/D1F 9255M79G02/ G03 (X) RE -/- .1977M27P001A (1) Bracket, Support .1885M52P001A S/B 73-0242
(1) RW/ RE 1/A Change Codes 1 = One-way interchangeable.
2 = Two-way interchangeable.
5 = Qualified interchangeability - parts added or deleted.
5 = Qualified interchangeability - Refer to paragraph 2.C., Interchangeability Spare Parts Support Codes A = Old parts will no longer be supplied.
B = Old parts will be supplied until all old parts are sold.
E = Old parts will be supplied, and can be used at other engine locations.
Operation Codes AD = Add DE = Delete RE = Replace RM = Remains RW = Rework May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 10 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement C. Interchangeability New support bracket 2021M83G01 replaces old IDG cooler bracket 1321M88P001A and spray shield 1606M57G01 or 1775M61G01 as a set. The new support bracket requires shorter bolts and no washers.
On FADEC engines, new support bracket 1885M52P001A must be used with new support bracket 2021M83G01 and is attached with three new bolts and nuts. On Boeing applications, new bracket 1885M52P001A also replaces an angle bracket.
On Airbus and Douglas applications, new support bracket 1977M27P001A must replace new bracket 1885M52P001A.
New spray shield 1883M60G01 is completely interchangeable with the old spray shield. On PMC engines, new spray shield 1977M20G01 can replace old spray 1517M22G06 or new 1883M59G01 spray shield. On FADEC engines, new spray shield 1883M59G01 must be used with new washers AN960C416, however, new spray shield 1883M59G01 can be replaced with a new or reworked spray shield 1977M20G01 without washers. It is recommended that the old bolts and washers used at the aft end of the fuel-oil cooler be changed to shorter bolts with no washers so they are the same as those at the forward end.
On Boeing PMC engines, new electrical lead PMUX bracket 1883M63G01 must be used with new spray shield 1883M59G01 or 1977M20G01 as a set.
D. Disposition of Parts Rework spray shield 1883M59G01 and support bracket 1885M52P001A. Discard old spray shields 1582M85G01, 1606M57G01, 1517M22G03/G06, 1775M61G01, IDG fuel-oil cooler bracket 1321M88P001A, electrical lead PMUX bracket 1383M66P001A, spray shield bracket 1577M93G05, angle bracket 1468M19P001A, and fuel supply angle bracket 1374M58G05.
3. ACCOMPLISHMENT INSTRUCTIONS A. General
(1) For PMC engine models A1/A2/A3/A5/A8/B1/B2/B4/B6, remove and install the IDG fuel oil cooler spray shields and bracket as follows:
(a) Remove four bolts (1, figure 1, sheet 1) and washers (2) from spray shield bracket (3) and the cooler. Remove the spray shield.
(b) Remove four bolts (1) and washers (2) from spray shield (4) and IDG cooler bracket (5). Remove the spray shield.
(c) Remove two bolts and washers (6) attaching bracket (5) to the cooler support bracket. Save the bolts and washers for installation.
(d) Install new spray shield (7, figure 1, sheet 2) to the aft end of the cooler with four new bolts (1). T orque the bolts to 55-70 lb in. (6.2-7.9 N·m).
May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 11 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.
t FUEL AND CONTROL - (73-00-00) - Spray Shields and Support Bracket - Improvement
(e) Install four new bolts (1) to attach support bracket (8) to the cooler.
Install new support bracket (8) to the cooler support bracket with two bolts and washers (6). T orque the bolts to 55-70 lb in. (6.2-7.9 N·m).
(2) For PMC engine models A1/A2/A3/A5/A8/B1/B2/B4/B6, remove and install the transmitter flowmeter spray shields as follows:
(a) Remove four bolts and washers (9, figure 2, sheet 1) attaching spray shield (10) to the aft end of the flowmeter and remove the spray shield.
Save the bolts and washers for installation.
(b) Install new spray shield (10) to the flowmeter with four bolts and washers
(9). T orque the bolts to 55-70 lb in. (6.2-7.9 N·m).
(c) For engine models A1/A2/A3/A5/A8 only , remove and install the forward spray shield as follows:
1 Remove three bolts and washers (11, figure 2, sheet 2), bolt (12), and angle bracket (13) attaching spray shield (14) to the forward end of the flowmeter. Remove the spray shield and save the bolts and washers for installation.
2 Install new spray shield (14) to the flowmeter with three bolts and washer (11), bracket (13), and bolt (12). T orque the bolts to 55-70 lb in. (6.2-7.9 N·m).
(d) For engine models B1/B2/B4/B6, remove and install the forward spray shield as follows:
1 Remove two bolts and washers (15, figure 2, sheet 2), two bolts
(16), and electrical lead PMUX bracket (17) attaching spray shield
(14) to the forward end of the flowmeter. Remove the spray shield and save the bolts and washers for installation.
2 Install new spray shield (14) to the flowmeter with two bolts and washer (15), PMUX bracket (17), and two bolts (16). T orque the bolts to 55-70 lb in. (6.2-7.9 N·m).
(3) For FADEC engine models B1F/B2F/B4F/B6F/B7F/A5F/D1F , remove and install the IDG fuel-oil cooler spray shields and brackets as follows:
(a) Remove four bolts (18, figure 3, sheet 1), washers (19) attaching spray shield bracket (20) to the cooler.
(b) Install new spray shield (20, figure 3, sheet 2) to the cooler with four new bolts (18). T orque the bolts to 55-70 lb in. (6.2-7.9 N·m).
(c) Remove bolt, nut, and washer (21) attaching the loop clamp on the HMU fuel tube to fuel supply angle bracket (22). Save the bolt, nut, and washer.
(d) On engine models B1F/B2F/B4F/B6F/B7F only, remove bolt, nut, and washer (23) attaching the loop clamp on the servo fuel heater oil tube May 17, 1996 CF6-80C2 S/B 73-0242 Revision 01, March 29, 2007 PAGE 12 GE PROPRIETARY INFORMA TION - Subject to the restrictions on the cover or first page.