DOC AIRBUS | AMM A320FRemoval of the Fuel Nozzle for DAC Engines [CFMB]
TASK 73-11-40-000-002-A-01
Removal of the Fuel Nozzle for DAC Engines
1. Reason for the Job
This TASK is applicable for DAC Engines.
There are 20 fuel nozzles installed in each engine. This procedure can be used to remove one or more of the fuel nozzles.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 73-11-40-941-058-A ** ON A/C NOT FOR ALL
Subtask 73-11-40-020-058-A ** ON A/C NOT FOR ALL
Pre SB CFM56-5B 72-181
(1) Disconnect the drain tubes from the top of each fuel nozzle drain shroud and from the drain manifold.
Post SB CFM56-5B 72-181
(3) Cut and remove the lockwire from the fuel manifold coupling shroud (the shroud that covers the coupling nut, referred to in this procedure as the coupling shroud).
End of SB CFM56-5B 72-181
(4) Move the coupling shroud rearward.
(5) Cut and remove the lockwire on the fuel supply tube coupling nut from both inlets . Disconnect the fuel supply tube coupling nut from both of the fuel nozzle inlets
(6) Remove and discard the O-ring (140) from both of the fuel supply tubes.
(7) Remove and discard the O-ring (150) from both of the fuel nozzle inlets.
(8) If a manifold support bracket is installed on the fuel nozzle, remove the bolts (10) that attach the manifold support bracket (20) to the nozzle.
(9) Remove the bolts (50) that attach the fuel nozzle to the combustion case.
(10) Move the fuel nozzle forward to disengage the tip of the nozzle from the combustor inner and outer ferrules.
(11) Turn the nozzle clockwise while you move the top of the nozzle towards the combustion case.
(12) Remove the fuel nozzle and note the position number.
(13) Remove the seal ring assembly from between the nozzle and the combustion case.
(14) Inspect the seal ring assembly and any other gaskets or seals removed for damage (Ref. AMM TASK 70-21-00-918-002).
(15) Keep the seal ring assembly and other gaskets or seals if there is no damage. Discard the seals and gaskets that are damaged.
(16) Install COVER - PROTECTION on the fuel nozzle, the combustion case pads, and fuel lines.
(17) Make a record of the part number, serial number and the position of the nozzles that you removed.
[Rev.10 from 2021]
2026.04.01 02:57:56 UTC
Removal of the Fuel Nozzle for DAC Engines
1. Reason for the Job
This TASK is applicable for DAC Engines.
There are 20 fuel nozzles installed in each engine. This procedure can be used to remove one or more of the fuel nozzles.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | CONTAINER 1 L (1/4 USGAL) |
| No specific | AR | COVER - PROTECTION |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2162) | liquid wrench |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 36-11-49-000-044-A | Removal of the High Pressure Tee Duct |
| TASK 36-11-49-000-045-A | Removal of the Lower High Pressure Duct |
| TASK 36-11-49-000-046-A | Removal of the Upper High Pressure Duct |
| TASK 36-11-49-000-048-A | Removal of the Fifth Stage Elbow Duct |
| TASK 70-21-00-918-002-A | Seals (Preformed Packings and O-rings) and Gaskets |
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 74-21-30-000-002-A | Removal of the Spark Igniter |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
Fuel Nozzle Arrangement Pre SB CFM56-5B 72-181Subtask 73-11-40-941-058-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 73-11-40-010-070-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 73-11-40-040-062-A ** ON A/C NOT FOR ALL Subtask 73-11-40-010-071-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
D. Open the thrust reverser doors: (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 73-11-40-020-058-A ** ON A/C NOT FOR ALL
A. Get Access to the Fuel Nozzle(s) that you must remove.
Pre SB CFM56-5B 72-181
(3) Apply a small amount of liquid wrench (Material No.CP2162) to the bolts (10), (50) that attach the fuel nozzle(s) to be removed to the combustion case. Permit the Liquid Wrench to soak for approximately 5 minutes.
(4) Put a CONTAINER 1 L (1/4 USGAL) below the fuel nozzle(s) to be removed to catch any fuel leakage.
Pre SB CFM56-5B 72-181
(5) To remove the engine hardware, brackets and fuel nozzles, refer to the following reference table:
Post SB CFM56-5B 72-181
(6) To remove the engine hardware, brackets and fuel nozzles, refer to the following reference table:
End of SB CFM56-5B 72-181
(7) Get access to the fuel nozzles in positions 1, 15, 16, 17, 19 and 20 as follows:
(a) Remove the engine bleed air ducts, if necessary, to get access to the fuel nozzles in positions 1, 15, 16, 17, 19 and 20 (Ref. AMM TASK 36-11-49-000-044) or (Ref. AMM TASK 36-11-49-000-045) or (Ref. AMM TASK 36-11-49-000-046) or (Ref. AMM TASK 36-11-49-000-048).
Pre SB CFM56-5B 72-181
(b) To remove fuel nozzles in positions 15, 16 and 17 go to step 4.B.(1).
Post SB CFM56-5B 72-181
(c) To remove fuel nozzles in positions 15, 16 and 17 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(d) Remove the bolts (10) that attach the cable support bracket to the nozzle in positions 1, 19, 20 and move the bracket away from the nozzle.
(e) To remove the fuel nozzles in positions 1, 19 and 20 go to step 4.B.(1).
Post SB CFM56-5B 72-181
(f) To remove the fuel nozzles in positions 1, 19 and 20 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(8) Get access to the fuel nozzles in positions 3, 8, 9, 10, 11, 12, 13 and 18 as follows:
(b) To remove the fuel nozzles in positions 9 and 10 go to step 4.B.(1).
Post SB CFM56-5B 72-181
(c) To remove the fuel nozzles in positions 9 and 10 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(d) Remove the LPT cooling brackets at fuel nozzles in positions 3, 8, 13 and 18 as follows:
1 Remove the bolts, strap clamp, washers and nuts that attach the LPT cooling tube to the LPT cooling bracket at the nozzle.
2 Remove the bolts (10) that attach the LPT cooling bracket to the nozzle in position 3 and 13 and remove the bracket.
3 Remove the bolts (10), that attach the LPT cooling bracket to the drain support bracket and the nozzle in position 8 and 18 and remove the LPT cooling bracket.
Pre SB CFM56-5B 72-181
4 To remove fuel nozzles in positions 3, 8, 13 and 18 go to step 4.B.(1).
Post SB CFM56-5B 72-181
5 To remove fuel nozzles in positions 3, 8, 13 and 18 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(e) To get access to the nozzle in position 12, remove the start bleed tube as follows:
1 Remove the bolts, strap clamp, washers and nuts that attach the start bleed tube to the start bleed tube bracket.
2 Cut and remove the lockwire from the bolts that attach the end of the start bleed tube to the combustion case pad. Remove the bolts.
3 Remove the seal from between the end of the start bleed tube and the combustion case pad.
4 Remove the bolts from the end of the start bleed tube and the HPTACC valve.
5 Remove the gasket from between the end of the start bleed tube and the RACSB valve.
6 Remove the start bleed tube.
7 Install COVER - PROTECTION on the open ends of the start bleed tube, the open pad of the combustion case and the open port of the RACSB valve.
Pre SB CFM56-5B 72-181
(f) To remove the fuel nozzle in position 12, go to step 4.B.(1).
Post SB CFM56-5B 72-181
(g) To remove the fuel nozzle in position 12, go to step 4.B.(3).
End of SB CFM56-5B 72-181
(h) Remove the bolt that attaches the clamp securing the pilot manifold supply tube to the support bracket at the fuel nozzle in position 11.
(i) Remove the bolts (10) that attach the support bracket to the drain support bracket and the nozzle in position 11 and move the support bracket out of the way.
(j) To remove the fuel nozzle in position 11, go to step 4.B.(1).
Post SB CFM56-5B 72-181
(k) To remove the fuel nozzle in position 11, go to step 4.B.(3).
End of SB CFM56-5B 72-181
(9) Get access to the fuel nozzles in position 6 and 7 as follows:
(a) Remove the LPTACC tube as follows:
1 Remove the bolt, washer and nut that attach the LPTACC tube to the support bracket at the fuel nozzle in position 6.
2 Loosen the nut and remove the clamp assembly from the forward end of the LPTACC tube.
3 Carefully pull the LPTACC tube forward to disengage it from the LPTACC air manifold and remove the tube and piston ring.
4 Install COVER - PROTECTION on the open ends of the LPTACC tube and the open end of the LPTACC valve.
Pre SB CFM56-5B CFM56-5B 72-181
(b) To remove the fuel nozzle in position 7, go to step 4.B.(1).
Post SB CFM56-5B 72-181
(c) To remove the fuel nozzle in position 7, go to step 4.B.(3).
End of SB CFM56-5B 72-181
(d) Remove the HPTACC manifold as follows:
2 Remove the bolts, strap clamp, washers and nuts that attach the HPTACC manifold to the bracket at the combustion case end of the lower RH LPT cooling tube.
3 Remove the bolts and strap clamp that attach the HPTACC manifold to the bracket between flange R and flange S.
4 Remove the bolts, strap clamp, washers and nuts that attach the HPTACC manifold to the support bracket at the fuel nozzle in position 6.
5 Remove the V-clamp and the seal between the large forward port of the HPTACC manifold and the discharge port of the HPTACC valve at 3 o'clock.
6 Remove the bolts, nuts, gaskets and plate between the forward 4-bolt pad of the HPTACC manifold and the air manifold at 3 o'clock.
7 Cut and remove the lockwire from the bolts that attach the end of the HPTACC manifold to the lower combustion case 3-bolt pad at 7 o'clock. Remove the bolts.
8 Remove the C-seal from between the end of the HPTACC manifold and the lower combustion case pad.
9 Cut and remove the lockwire from the bolts that attach the end of the HPTACC manifold to the upper combustion case 3-bolt pad at 1 o'clock. Remove the bolts.
10 Remove the C-seal from between the end of the HPTACC manifold and the upper combustion case pad.
11 Remove the HPTACC manifold.
12 Install COVER - PROTECTION on the open ends of the HPTACC manifold, the open pads of the combustion case and the open ports of the HPTACC valve.
Pre SB CFM56-5B 72-181
(e) Remove the bolts (10) that attach the HPT manifold support bracket to the manifold support bracket and the fuel nozzle in position 6.
Post SB CFM56-5B 72-181
(f) Remove the bolts (10) that attach the HPT manifold support bracket to the fuel nozzle in position 6.
End of SB CFM56-5B 72-181
(g) To remove the fuel nozzle in position 6, go to step 4.B.(1).
Subtask 73-11-40-020-059-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
(1) Determine the position number of the fuel nozzle(s) to be removed. The fuel nozzles are given position numbers in a clockwise (CW) sequence when you look at them from the aft of the engine. Position number 1 is at 12 o'clock. Pre SB CFM56-5B 72-181
NOTE: There are two types of fuel nozzles. Nozzles in positions 1, 3, 5, 7, 9, 11, 13, 15, 17 and 19 are bleed fuel nozzles. Nozzles in positions 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20 are cooling fuel nozzles. The same type of fuel nozzle must be installed in each position during replacement.
Post SB CFM56-5B 72-181 NOTE: There are two types of fuel nozzles. Nozzles in positions 1, 2, 5, 6, 9, 10, 13, 14, 17 and 18 are bleed fuel nozzles. Nozzles in positions 3, 4, 7, 8, 11, 12, 15, 16, 19 and 20 are cooling fuel nozzles. The same type of fuel nozzle must be installed in each position during replacement.
End of SB CFM56-5B 72-181 NOTE: At some positions, you must remove some external engine hardware to get access to the fuel nozzle(s) to be removed.
NOTE: At some positions, drain manifold support brackets or engine plumbing support brackets are installed with the fuel nozzle. It is necessary to remove these brackets for removal of the fuel nozzle. Identify the bolts and brackets by position number and keep the bolts and the brackets for each nozzle position together to ease the installation of the fuel nozzle.
(2) Cut and remove the lockwire from the bolts (10, 50) that attach the fuel nozzle(s) to be removed to the combustion case. (3) Apply a small amount of liquid wrench (Material No.CP2162) to the bolts (10), (50) that attach the fuel nozzle(s) to be removed to the combustion case. Permit the Liquid Wrench to soak for approximately 5 minutes.
(4) Put a CONTAINER 1 L (1/4 USGAL) below the fuel nozzle(s) to be removed to catch any fuel leakage.
Pre SB CFM56-5B 72-181
(5) To remove the engine hardware, brackets and fuel nozzles, refer to the following reference table:
| FUEL NOZZLE POS. NO. | O'CLOCK POSITION ALF | HARDWARE TO REMOVE | START AT STEP |
|---|---|---|---|
| 1 | 12:00 | Engine bleed air duct Cable and drain support bracket | 4.A.(7) |
| 2 | 12:30 | None | 4.B.(1) |
| 3 | 1:00 | LPT cooling bracket | 4.A.(8) |
| 4 | 2:00 | Drain support bracket | 4.B.(1) |
| 5 | 2:30 | None | 4.B.(1) |
| 6 | 3:00 | LPTACC tube HPT manifold support bracket Drain support bracket | 4.A.(9) |
| 7 | 3:30 | LPTACC tube | 4.A.(9) |
| 8 | 4:00 | LPT cooling bracket Drain support bracket | 4.A.(8) |
| 9 | 5:00 | RH Spark igniter RH Ignition lead (move) | 4.A.(8) |
| 10 | 5:30 | RH Spark igniter RH Ignition lead (move) Drain support bracket | 4.A.(8) |
| 11 | 6:00 | Support bracket Drain support bracket | 4.A.(8) |
| 12 | 6:30 | LH Spark igniter LH Ignition lead (move) Start bleed tube | 4.A.(8) |
| 13 | 7:00 | LH Spark igniter LH Ignition lead (move) LPT cooling bracket | 4.A.(8) |
| 14 | 8:00 | Drain support bracket | 4.B.(1) |
| 15 | 8:30 | Engine bleed air duct | 4.A.(7) |
| 16 | 9:00 | Engine bleed air duct Drain support bracket | 4.A.(7) |
| 17 | 9:30 | Engine bleed air duct | 4.A.(7) |
| 18 | 10:00 | LPT cooling bracket Drain support bracket | 4.A.(8) |
| 19 | 10:30 | Engine bleed air duct Cable support bracket | 4.A.(7) |
| 20 | 11:00 | Engine bleed air duct Cable support bracket Drain support bracket | 4.A.(7) |
(6) To remove the engine hardware, brackets and fuel nozzles, refer to the following reference table:
| FUEL NOZZLE POS. NO. | O'CLOCK POSITION ALF | HARDWARE TO REMOVE | START AT STEP |
|---|---|---|---|
| 1 | 12:00 | Engine bleed air duct Cable and drain support bracket | 4.A.(7) |
| 2 | 12:30 | None | 4.B.(3) |
| 3 | 1:00 | LPT cooling bracket | 4.A.(8) |
| 4 | 2:00 | None | 4.B.(1) |
| 5 | 2:30 | None | 4.B.(3) |
| 6 | 3:00 | LPTACC tube HPT manifold support bracket | 4.A.(9) |
| 7 | 3:30 | LPTACC tube | 4.A.(9) |
| 8 | 4:00 | LPT cooling bracket | 4.A.(8) |
| 9 | 5:00 | RH Spark igniter RH Ignition lead (move) | 4.A.(8) |
| 10 | 5:30 | RH Spark igniter RH Ignition lead (move) Drain support bracket | 4.A.(8) |
| 11 | 6:00 | Support bracket Drain support bracket | 4.A.(8) |
| 12 | 6:30 | LH Spark igniter LH Ignition lead (move) Start bleed tube | 4.A.(8) |
| 13 | 7:00 | LH Spark igniter LH Ignition lead (move) LPT cooling bracket | 4.A.(8) |
| 14 | 8:00 | None | 4.B.(3) |
| 15 | 8:30 | Engine bleed air duct | 4.A.(7) |
| 16 | 9:00 | Engine bleed air duct | 4.A.(7) |
| 17 | 9:30 | Engine bleed air duct | 4.A.(7) |
| 18 | 10:00 | LPT cooling bracket | 4.A.(8) |
| 19 | 10:30 | Engine bleed air duct Cable support bracket | 4.A.(7) |
| 20 | 11:00 | Engine bleed air duct Cable support bracket | 4.A.(7) |
(7) Get access to the fuel nozzles in positions 1, 15, 16, 17, 19 and 20 as follows:
(a) Remove the engine bleed air ducts, if necessary, to get access to the fuel nozzles in positions 1, 15, 16, 17, 19 and 20 (Ref. AMM TASK 36-11-49-000-044) or (Ref. AMM TASK 36-11-49-000-045) or (Ref. AMM TASK 36-11-49-000-046) or (Ref. AMM TASK 36-11-49-000-048).
Pre SB CFM56-5B 72-181
(b) To remove fuel nozzles in positions 15, 16 and 17 go to step 4.B.(1).
Post SB CFM56-5B 72-181
(c) To remove fuel nozzles in positions 15, 16 and 17 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(d) Remove the bolts (10) that attach the cable support bracket to the nozzle in positions 1, 19, 20 and move the bracket away from the nozzle.
NOTE: It should not be necessary to remove the wires attached to these brackets.
Pre SB CFM56-5B 72-181 (e) To remove the fuel nozzles in positions 1, 19 and 20 go to step 4.B.(1).
Post SB CFM56-5B 72-181
(f) To remove the fuel nozzles in positions 1, 19 and 20 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(8) Get access to the fuel nozzles in positions 3, 8, 9, 10, 11, 12, 13 and 18 as follows:
CAUTION:
ENSURE THAT THE SPARK IGNITER IS PROPERLY CAPPED AND MOVED TO A SECURE AND PROTECTED LOCATION BEFORE PROCEEDING.
(a) Remove the spark igniter from the combustion case and move the ignition lead away from the fuel nozzle, if necessary, to get access to the fuel nozzles in positions 9, 10, 12 and 13 (Ref. AMM TASK 74-21-30-000-002). At the fuel nozzle in position 11, remove the ignition lead from the clip on the support bracket. NOTE: Disengage the ignition lead from clamps, if necessary, to get access to the nozzle to be removed.
Pre SB CFM56-5B 72-181 (b) To remove the fuel nozzles in positions 9 and 10 go to step 4.B.(1).
Post SB CFM56-5B 72-181
(c) To remove the fuel nozzles in positions 9 and 10 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(d) Remove the LPT cooling brackets at fuel nozzles in positions 3, 8, 13 and 18 as follows:
1 Remove the bolts, strap clamp, washers and nuts that attach the LPT cooling tube to the LPT cooling bracket at the nozzle.
2 Remove the bolts (10) that attach the LPT cooling bracket to the nozzle in position 3 and 13 and remove the bracket.
3 Remove the bolts (10), that attach the LPT cooling bracket to the drain support bracket and the nozzle in position 8 and 18 and remove the LPT cooling bracket.
Pre SB CFM56-5B 72-181
4 To remove fuel nozzles in positions 3, 8, 13 and 18 go to step 4.B.(1).
Post SB CFM56-5B 72-181
5 To remove fuel nozzles in positions 3, 8, 13 and 18 go to step 4.B.(3).
End of SB CFM56-5B 72-181
(e) To get access to the nozzle in position 12, remove the start bleed tube as follows:
1 Remove the bolts, strap clamp, washers and nuts that attach the start bleed tube to the start bleed tube bracket.
2 Cut and remove the lockwire from the bolts that attach the end of the start bleed tube to the combustion case pad. Remove the bolts.
3 Remove the seal from between the end of the start bleed tube and the combustion case pad.
4 Remove the bolts from the end of the start bleed tube and the HPTACC valve.
5 Remove the gasket from between the end of the start bleed tube and the RACSB valve.
6 Remove the start bleed tube.
7 Install COVER - PROTECTION on the open ends of the start bleed tube, the open pad of the combustion case and the open port of the RACSB valve.
Pre SB CFM56-5B 72-181
(f) To remove the fuel nozzle in position 12, go to step 4.B.(1).
Post SB CFM56-5B 72-181
(g) To remove the fuel nozzle in position 12, go to step 4.B.(3).
End of SB CFM56-5B 72-181
(h) Remove the bolt that attaches the clamp securing the pilot manifold supply tube to the support bracket at the fuel nozzle in position 11.
(i) Remove the bolts (10) that attach the support bracket to the drain support bracket and the nozzle in position 11 and move the support bracket out of the way.
NOTE: It should not be necessary to remove the cables attached to the support bracket.
Pre SB CFM56-5B 72-181 (j) To remove the fuel nozzle in position 11, go to step 4.B.(1).
Post SB CFM56-5B 72-181
(k) To remove the fuel nozzle in position 11, go to step 4.B.(3).
End of SB CFM56-5B 72-181
(9) Get access to the fuel nozzles in position 6 and 7 as follows:
(a) Remove the LPTACC tube as follows:
1 Remove the bolt, washer and nut that attach the LPTACC tube to the support bracket at the fuel nozzle in position 6.
2 Loosen the nut and remove the clamp assembly from the forward end of the LPTACC tube.
3 Carefully pull the LPTACC tube forward to disengage it from the LPTACC air manifold and remove the tube and piston ring.
4 Install COVER - PROTECTION on the open ends of the LPTACC tube and the open end of the LPTACC valve.
Pre SB CFM56-5B CFM56-5B 72-181
(b) To remove the fuel nozzle in position 7, go to step 4.B.(1).
Post SB CFM56-5B 72-181
(c) To remove the fuel nozzle in position 7, go to step 4.B.(3).
End of SB CFM56-5B 72-181
(d) Remove the HPTACC manifold as follows:
CAUTION:
BE CAREFUL NOT TO CUT OR DENT THE INSULATION FOIL THAT COVERS THE HPTACC MANIFOLD.
ENGINE EFFICIENCY COULD BE AFFECTED.
1 Remove the bolts, strap clamp, washers and nuts that attach the HPTACC manifold to the bracket at the combustion case end of the upper RH LPT cooling tube. 2 Remove the bolts, strap clamp, washers and nuts that attach the HPTACC manifold to the bracket at the combustion case end of the lower RH LPT cooling tube.
3 Remove the bolts and strap clamp that attach the HPTACC manifold to the bracket between flange R and flange S.
4 Remove the bolts, strap clamp, washers and nuts that attach the HPTACC manifold to the support bracket at the fuel nozzle in position 6.
5 Remove the V-clamp and the seal between the large forward port of the HPTACC manifold and the discharge port of the HPTACC valve at 3 o'clock.
6 Remove the bolts, nuts, gaskets and plate between the forward 4-bolt pad of the HPTACC manifold and the air manifold at 3 o'clock.
7 Cut and remove the lockwire from the bolts that attach the end of the HPTACC manifold to the lower combustion case 3-bolt pad at 7 o'clock. Remove the bolts.
8 Remove the C-seal from between the end of the HPTACC manifold and the lower combustion case pad.
9 Cut and remove the lockwire from the bolts that attach the end of the HPTACC manifold to the upper combustion case 3-bolt pad at 1 o'clock. Remove the bolts.
10 Remove the C-seal from between the end of the HPTACC manifold and the upper combustion case pad.
11 Remove the HPTACC manifold.
12 Install COVER - PROTECTION on the open ends of the HPTACC manifold, the open pads of the combustion case and the open ports of the HPTACC valve.
Pre SB CFM56-5B 72-181
(e) Remove the bolts (10) that attach the HPT manifold support bracket to the manifold support bracket and the fuel nozzle in position 6.
Post SB CFM56-5B 72-181
(f) Remove the bolts (10) that attach the HPT manifold support bracket to the fuel nozzle in position 6.
End of SB CFM56-5B 72-181
(g) To remove the fuel nozzle in position 6, go to step 4.B.(1).
WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
B. Removal of the Fuel Nozzle. Pre SB CFM56-5B 72-181
(1) Disconnect the drain tubes from the top of each fuel nozzle drain shroud and from the drain manifold.
NOTE: In some locations, the nozzle drain tubes are a one-piece assembly serving both inlets. In other locations, each inlet is served by an individual drain tube.
(2) Remove and discard the O-ring (160) from where each end of the drain tube connects to the shroud. Post SB CFM56-5B 72-181
(3) Cut and remove the lockwire from the fuel manifold coupling shroud (the shroud that covers the coupling nut, referred to in this procedure as the coupling shroud).
End of SB CFM56-5B 72-181
(4) Move the coupling shroud rearward.
CAUTION:
DO NOT MOVE THE COUPLING SHROUD REARWARD TOO FAR TO GET ACCESS TO THE COUPLING NUT OF THE FUEL SUPPLY LINE. THIS CAN PREVENT DAMAGE TO THE COUPLING SHROUD.
(a) Turn the coupling shroud counterclockwise 90 degrees and move it rearward until you can get access to the coupling nut of the fuel supply line. Do this at both fuel nozzle inlets. (5) Cut and remove the lockwire on the fuel supply tube coupling nut from both inlets . Disconnect the fuel supply tube coupling nut from both of the fuel nozzle inlets
(6) Remove and discard the O-ring (140) from both of the fuel supply tubes.
(7) Remove and discard the O-ring (150) from both of the fuel nozzle inlets.
(8) If a manifold support bracket is installed on the fuel nozzle, remove the bolts (10) that attach the manifold support bracket (20) to the nozzle.
(9) Remove the bolts (50) that attach the fuel nozzle to the combustion case.
(10) Move the fuel nozzle forward to disengage the tip of the nozzle from the combustor inner and outer ferrules.
(11) Turn the nozzle clockwise while you move the top of the nozzle towards the combustion case.
(12) Remove the fuel nozzle and note the position number.
(13) Remove the seal ring assembly from between the nozzle and the combustion case.
(14) Inspect the seal ring assembly and any other gaskets or seals removed for damage (Ref. AMM TASK 70-21-00-918-002).
(15) Keep the seal ring assembly and other gaskets or seals if there is no damage. Discard the seals and gaskets that are damaged.
(16) Install COVER - PROTECTION on the fuel nozzle, the combustion case pads, and fuel lines.
(17) Make a record of the part number, serial number and the position of the nozzles that you removed.