Removal of the High Pressure Turbine Active Clearance Control (HPTACC) Valve [CFMI]

TASK 75-21-10-000-001-A
Removal of the High Pressure Turbine Active Clearance Control (HPTACC) 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	CAP - BLANKING
No specific	1	CONTAINER 20 L - SHALLOW
No specific	AR	PLIERS - JAWED, SOFT
No specific	AR	PLUG - BLANKING
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, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 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 73-00-00-680-002-A	Draining of the Engine Fuel Circuit
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
HPTACC Valve Location
TCC Drain Tube and Fuel Manifold
Air Start Tube and TCC Air Manifold
Stage 5 Air Tube
HPTACC Valve

3. Job Set-up
Subtask 75-21-10-941-050-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 75-21-10-861-052-A ** ON A/C NOT FOR ALL

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

Subtask 75-21-10-865-052-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 75-21-10-010-051-A ** ON A/C NOT FOR ALL

D. Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 75-21-10-040-051-A ** ON A/C NOT FOR ALL

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

Subtask 75-21-10-010-053-A ** ON A/C NOT FOR ALL

F. Open the right thrust reverser door: (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
452AR
(2) FOR [1000EM2] (ENGINE-2)
462AR

4. Procedure
Subtask 75-21-10-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the HPT Active Clearance Control Valve:
(1) Drain the engine fuel circuit (Ref. AMM TASK 73-00-00-680-002).
(2) Disconnect the electrical connectors, Channel A (140) and Channel B (130), from the HPTACC valve as follows:
(a) Disconnect the Channel A (260) and the Channel B (250) electrical connectors from the HPTACC valve (10). Use PLIERS - JAWED, SOFT if necessary.
(b) Install CAP - BLANKING on the electrical connectors of the leads for Channel A (260) and Channel B (250).
(c) Install CAP - BLANKING on the electrical connectors on the HPTACC valve for Channel A (140) and Channel B (130).
(3) Put a CONTAINER 20 L - SHALLOW under the area of the TCC fuel manifold (200) and the drain line (230).
(4) Remove the cap assembly (225) of the drain tube (230). Fuel will drain into the container.
(5) Remove the TCC fuel manifold (200) from the HPTACC valve (260) as follows:
(a) Remove the bolts (210) from the TCC fuel manifold (200).
(b) Remove the gasket (220) from between the TCC fuel manifold (200) and the fuel supply flange of the HPTACC valve (260).
(6) Disconnect

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(a) Disconnect the TCC drain tube (230) from the nipple (240) of the drain port.

NOTE: If the new HPTACC valve (260) has a nipple installed in the drain port, do not do the steps (7) and (8).

(7) Remove the nipple (240) from the drain port.
(8) Remove and discard the O-ring (250).
(9) Remove the drain tube (230).
(10) Install PLUG - BLANKING on the drain port, on the drain cap fitting and on both ends of fuel drain tube (230) and on the coupling of the drain line where the tube (230) was removed.
(11) Remove the air start tube (90) from the HPTACC valve (260) as follows:

Air Start Tube and TCC Air Manifold ** ON A/C NOT FOR ALL

PRE SB (CFM56-5) 72-033

(a) Remove the bolts (70) and the nuts (75) from the start air tube (90).

POST SB (CFM56-5) 72-033

(b) Remove the bolts (70) from the start air tube (90).
(c) Remove the gasket (80) from between the air start tube (90) and the start bleed port of the HPTACC valve (260).
(12) Remove the TCC air manifold (10) from the HPTACC valve (260) as follows:

Air Start Tube and TCC Air Manifold ** ON A/C NOT FOR ALL

PRE SB (CFM56-5) 72-012

(a) Remove the bolts (40) and the nuts (45) from the TCC air manifold (10).

POST SB (CFM56-5) 72-012

(b) Remove the bolts (40), washers (30) and nuts (45) from the TCC air manifold (10).

POST SB (CFM56-5) 72-033

(c) Remove the bolts (40) and washers (30) from the TCC air manifold (10).

PRE SB (CFM56-5) 72-012

(d) Remove the bolts (20) from the TCC air manifold (10) and the manifold bracket (50).

POST SB (CFM56-5) 72-012

(e) Remove the bolts (20) and washers (30) from the TCC air manifold (10) and the manifold bracket (50).
(f) Remove the C-seal gasket (60) from between the TCC air manifold (10) and the TCC flange of the HPTACC valve (260).
(13) Remove the Stage 5 air tube (170) from the HPTACC valve (260) as follows:

Stage 5 Air Tube ** ON A/C NOT FOR ALL

PRE SB (CFM56-5) 72-033

(a) Remove the bolts (150), washers (160) and nuts (195) from the Stage 5 air tube (170).

POST SB (CFM56-5) 72-033

(b) Remove the bolts (150) and the washers (160) from the Stage 5 air tube (170).

PRE SB (CFM56-5) 72-033

(c) Remove the bolts (155), washers (165) and nuts (195) from the Stage 5 air tube (170).

POST SB (CFM56-5) 72-033

(d) Remove the bolts (155) and washers (165) from the Stage 5 air tube (170).

POST SB (CFM56-5) 75-018

(e) Remove the bolts (155) from the Stage 5 air tube (170) and support bracket.
(f) Remove the C-seal gasket (190) from between the inlet flange of the Stage 5 air tube (170) and the HPTACC valve (260).
(g) Do not remove the ring seal (180) from the Stage 5 air tube (170).
(14) Disconnect the ninth stage inlet flange from the combustion case boss as follows:

HPTACC Valve ** ON A/C NOT FOR ALL

(a) Cut and remove the lockwire from bolts (270), (280).
(b) Remove the bolts (270), (280) that attach the ninth stage inlet flange to the combustion case boss.
(c) Remove the C-seal gasket (290) from between the ninth stage inlet flange and the combustion case boss.

PRE SB (CFM56-5) 75-018

(15) Remove the support link (100) from the attachment lug of the HPTACC valve (260) as follows:

HPTACC Valve ** ON A/C NOT FOR ALL

(a) Remove the bolt (110) and the nut (120) from the support link (100).
(b) Move the support link (100) away from the HPTACC valve (260).

POST SB (CFM56-5) 75-018

(16) Step not necessary. There is no support link.
(17) Remove the HPTACC valve (260).
(18) Install PLUG - BLANKING on HPTACC valve and on the open tubes and bosses.

[Rev.10 from 2021] 2026.04.01 12:54:45 UTC