Visual Inspection of the Start Bleed/Booster Anti-Ice Valve [CFML]

TASK 75-11-05-210-801-A
Visual Inspection of the Start 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.

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	1	PLIERS - JAWED, SOFT
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 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 73-21-60-000-813-A	Removal of the HJ8A Engine Wiring Harness
TASK 73-21-60-400-813-A	Installation of the HJ8A Engine Wiring Harness
TASK 75-11-05-000-801-A	Removal of the Starter Bleed/Booster Anti-Ice Valve
TASK 75-11-05-400-801-A	Installation of the Starter Bleed/Booster Anti-Ice Valve
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors

3. Job Set-up
Subtask 75-11-05-941-052-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
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 75-11-05-010-054-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
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 75-11-05-040-052-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 75-11-05-010-055-A

D. Get Access
(1) Open the right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

4. Procedure
Subtask 75-11-05-210-050-A

A. Visual Inspection of the Start Bleed/Booster Anti-Ice Valve

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Start Bleed/booster Anti-ice valve for looseness	Not serviceable.	Tighten the installation bolts (Ref. AMM TASK 75-11-05-400-801).
2.Signs of air leaks at the connections	No leaks permitted.	If you see signs of an air leak, do this step: -Disconnect the booster anti-ice duct from the booster anti-ice valve joint. -Do an inspection of the seal for damage. (a) If the seal is damaged, replace the seal. NOTE: If the seal is not damaged, keep it for the installation.
3.Examine the V-band coupling	Not serviceable.	Do the V-band and V-retainer coupling, seal and flange inspection steps in the V-Band and V-Retainer Coupling Installation (Ref. AMM TASK 75-11-05-400-801). To correctly install the V-band couplings on the booster anti-ice valve, do this task: V-Band and V-Retainer Coupling Installation (Ref. AMM TASK 75-11-05-400-801).
4.Look for cracks and dents in the booster anti-ice valve	Not Serviceable.	If you see a crack or dent, replace the booster anti-ice valve (Ref. AMM TASK 75-11-05-000-801) and (Ref. AMM TASK 75-11-05-400-801).
5.Examine the electrical receptacles and electrical connectors	Not Serviceable.	- If the electrical connector is loose, use the PLIERS - JAWED, SOFT to tighten the electrical connector (Ref. AMM TASK 70-70-00-910-804). -If the electrical connector has damage that prevents the correct installation of the electrical connector, replace the wiring harness (Ref. AMM TASK 73-21-60-000-813) (Ref. AMM TASK 73-21-60-400-813). -If a booster anti-ice valve receptacle has damage that prevents the correct installation of the electrical connector, replace the booster anti-ice valve (Ref. AMM TASK 75-11-05-000-801) and (Ref. AMM TASK 75-11-05-400-801). Small damage to the booster anti-ice valve electrical receptacle threads is permitted, if you repair the damage. NOTE: You must repair the damage so that the connector can be tightened and hold torque.

5. Close-up
Subtask 75-11-05-410-052-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

Subtask 75-11-05-440-051-A

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 75-11-05-410-053-A

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:14:02 UTC