Removal of the Starter Bleed/Booster Anti-Ice Valve [CFML]

TASK 75-11-05-000-801-A
Removal of the Starter Bleed/Booster Anti-Ice Valve

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

FIN: 4161KS

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CAP - PROTECTION
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
CMM 751105
Starter Bleed/Booster Anti-Ice Valve (PRE and POST SB 72-0057, 72-0190)

3. Job Set-up
Subtask 75-11-05-941-050-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 75-11-05-010-050-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

Subtask 75-11-05-040-050-A

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 75-11-05-010-051-A

D. Open the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR
(3) Put an ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure
Subtask 75-11-05-020-050-A

A. Removal of the Starter Bleed/Booster Anti-Ice Valve
(1) Remove the start bleed leg-air-duct (4) as follows:
(a) Remove the two bolts (5) that attach the start bleed leg-air-duct (4) to the support bracket (6).
(b) Hold the start bleed leg-air-duct (4) and remove the coupling (2) that attaches the start bleed leg-air-duct (4) to the starter bleed/booster anti-ice valve (1).
(c) Remove the start bleed leg-air-duct (4) from the engine.
(d) Remove and discard the seal (3).
(2) Remove the starter bleed/booster anti-ice valve (1) as follows:

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.

(a) Disconnect the electrical connector (8) from the starter bleed/booster anti-ice valve (Ref. AMM TASK 70-70-00-910-804).
(b) Put a CONTAINER 5 L (1.32 USGAL) below the area of the fuel manifold (9).
(c) Disconnect the drain tube (10) B-nut from the starter bleed/booster anti-ice valve (1).

PRE SB 72-0190
(d) Removal of the safety wire or cable.

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

1 Remove safety wire or cable from fuel manifold (9) B-nuts.
(e) Disconnect the fuel manifold (9) B-nuts (2 locations) from the starter bleed/booster anti-ice valve (1).

NOTE: The fuel manifold (9) is connected to the starter bleed/booster at two locations. There are two different size B-nuts on these two tubes that are part of the fuel manifold (9).

END OF PRE SB 72-0190
POST SB 72-0190
(f) Removal of the safety wire or cable.

1 Remove safety wire or cable from fuel tube (9) B-nuts.
(g) Disconnect the fuel tube (9) B-nuts (2 locations) from the starter bleed/booster anti-ice valve (1).

NOTE: There are two different size B-nuts on these two tubes.

END OF POST SB 72-0190

(h) Remove the coupling (12) that attaches the booster anti-ice air tube (11) to the starter bleed/booster anti-ice valve (1).
(i) Remove and discard the seal (13).
(j) Remove the coupling (15) that attaches the start bleed tube-duct (14) to the starter bleed/booster anti-ice valve (1).
(k) Remove and discard the seal (16).

PRE SB 72-0190

(l) Hold the starter bleed/booster anti-ice valve (1) and remove the two bolts (17) that attach the starter bleed/booster anti-ice valve (1) to the bracket (7).

END OF PRE SB 72-0190

(m) Remove the starter bleed/booster anti-ice valve (1) from the engine.

Subtask 75-11-05-620-050-A

B. Preservation of the Starter Bleed/Booster Anti-Ice Valve
(1) In the instance of shipping or prolonged storage, preserve the starter bleed/booster anti-ice valve per the CMM 751105.

Subtask 75-11-05-420-050-A

C. General
(1) Install COVER - PROTECTION and CAP - PROTECTION on all open ports, open tubes, open hoses and connectors.

[Rev.10 from 2021] 2026.04.01 12:57:43 UTC