Removal of the Rotor Active Clearance Control (RACC) Valve [CFMI]

TASK 75-23-10-000-001-A
Removal of the Rotor Active Clearance Control (RACC) Valve

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CAP - BLANKING
No specific	1	CONTAINER 20 L - SHALLOW
No specific	AR	COVER - PROTECTION
No specific	AR	PLIERS - NOSE, SOFT, LONG
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
Rotor Active Clearance Control Valve sheet 1 of 4
Rotor Active Clearance Control Valve (Pre SB CFM56-5 75-007) sheet 2 of 4
Rotor Active Clearance Control valve sheet 4 of 4
Rotor Active Clearance Control Valve (Post SB CFM56-5 75-007) sheet 3 of 4

3. Job Set-up
Subtask 75-23-10-941-050-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 75-23-10-861-050-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 75-23-10-865-055-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
FOR FIN: 1000EM2 (ENGINE2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26

Subtask 75-23-10-010-051-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open 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 1M(3 FT) in position.

Subtask 75-23-10-040-050-A ** ON A/C NOT FOR ALL

E. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 75-23-10-010-052-A ** ON A/C NOT FOR ALL

F. 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
Subtask 75-23-10-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the electrical connections and fuel manifold
(1) Remove the electrical connections of the RACC valve as follows:
(a) Cut and remove the lockwire from the insulation blanket (210) installed on the RACC valve (10).
(b) Open the insulation blanket (210) and disconnect the electrical connectors, Channel A (5) and Channel B (15), from the RACC valve (10). If necessary use PLIERS - NOSE, SOFT, LONG to loosen the electrical connectors.
(c) Install CAP - BLANKING on the open ends of the electrical connectors and the RACC valve receptacles.
(2) Remove the fuel manifold as follows:
(a) Remove the bolts (220, 240) and the nuts (230, 250) from the loop clamps (260, 270) that attach the fuel drain manifold (20) to the fuel manifold (60). Then, remove the loop clamps (260, 270).
(b) Put a container below the drain tube coupling nut (30).
(c) Disconnect

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 Disconnect the drain tube coupling nut (30).
(d) Remove the bolts (290, 310) and the nut (280, 320) from the loop clamps (300, 330) that attach the fuel manifold (60) and the fuel drain manifold (20) to the upper bracket and the LPT cooling tube bracket. Then, remove the loop clamps (300).
(e) Remove the bolts (340) and the nuts (350) from the loop clamps (360) that attach the fuel manifold (60) to the VSV drain bracket. Then, remove the clamps (360).
(f) Remove the bolts (370), washers (380) and the nuts (390) that attach the fuel manifold (60) to the lower air tube (50). Then, remove the loop clamps (400, 410).
(g) Put a CONTAINER 20 L - SHALLOW below the fuel manifold (480).
(h) Remove the bolts (430) and the nuts (420), that attach the fuel manifold (60) to the fuel manifold (480).

Subtask 75-23-10-020-052-A ** ON A/C NOT FOR ALL

B. Removal of the (LPTCC) fuel manifold
(1) Remove the (LPTCC) fuel manifold as follows:
(a) Remove and discard the gasket (440) that is between the fuel manifold (60) and the fuel manifold (480).
(b) Put a container below the LPTCC fuel manifold (450).
(c) Remove the bolts (460) from the lower flange of the LPTCC fuel manifold (450). Then, remove the manifold (450).
(d) Remove and discard the gasket (440, 470) at both ends of the LPTCC fuel manifold (450).

NOTE: The seals can be used again if there is no damage.

(e) Disconnect the coupling nut on the fuel drain manifold (20) and the coupling nut on the drain tube (30) from the drain connectors (70). Then, remove the fuel drain tube (30).
(f) Disconnect the nut on the fuel drain manifold (20) from the VSV actuator drain manifold. Then, remove the fuel drain manifold (20).
(g) Disconnect the coupling nut of the fuel drain tube (30) from the nipple of the fuel drain manifold (20). Remove the fuel drain tube (30) and install COVER - PROTECTION on the open ends of the tube.
(2) Remove the fuel bolts as follows:
(a) Cut and remove the lockwire from the drain connectors (70) and the fuel manifolds (60). Then, disconnect the drain connectors (70). If necessary, use PLIERS - NOSE, SOFT, LONG to loosen the connectors.
(b) Remove and discard the O-rings (80) from the drain connectors (70).
(c) Remove the fuel bolts (90) from the fuel manifold (60). Then, remove and discard the O-rings (100) on the fuel bolts (90).
(3) Remove the fuel manifold as follows:
(a) Disconnect the fuel manifold (60). If necessary, use PLIERS - NOSE, SOFT, LONG to loosen the connectors.
(b) Remove the fuel manifold (60) from the RACC valve (10). Then, remove and discard the O-rings (110, 120) from the fuel manifold (60).
(c) Install CAP - BLANKING on the open ends of the fuel manifold (60).

Subtask 75-23-10-020-050-A ** ON A/C NOT FOR ALL

C. Remove the RACC valve as follows:
(1) Remove the Vee-band clamps (140, 190) and the seals (130, 200) from between the RACC valve (10) and the upper and lower air tubes (40, 50).
(2) Loosen the nuts that attach the clamps of the lower air tube (50).
(3) Loosen the nuts that attach the clamps of the upper air tube (40).
(4) Loosen the bolts that attach the upper air tube (40) to the fifth stage bleed port.
(5) Cut and remove the lockwire and loosen the bolts that attach the lower air tube (50) to the fan frame.
(6) Remove the bolts (150, 170) and the nuts (160, 180) that attach the RACC valve to the flange.
(7) Remove the insulation blanket (210) from the RACC valve (10).
(8) Remove the RACC valve (10).
(9) Install CAP - BLANKING on the open port of the HPC case.
(10) Install CAP - BLANKING on the open ports of the RACC valve (10) and the open ends of the upper and lower air tubes (40, 50).

[Rev.10 from 2021] 2026.04.01 12:54:46 UTC