General Visual Inspection of the Engine Hydraulic Tubes and Hoses

TASK 29-11-49-210-802-A
General Visual Inspection of the Engine Hydraulic Tubes and Hoses

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS UNTIL THEY ARE COOL. THE ENGINE COMPONENTS STAY HOT FOR MORE TIME AND CAN CAUSE INJURY.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

ZONE: 435
ZONE: 436
ZONE: 453
ZONE: 454

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 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
435	FAN AND ACCESSORY GEARBOX
436	FAN AND ACCESSORY GEARBOX
453	HOT SECTION
454	HOT SECTION
195BB, 197CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-11-49-000-805-A	Removal of the Hydraulic Case Drain Tubes and Hoses
TASK 29-11-49-000-806-A	Removal of the Hydraulic Suction Hose
TASK 29-11-49-000-807-A	Removal of the Hydraulic Pressure Hose
TASK 29-11-49-400-805-A	Installation of the Hydraulic Case Drain Tubes and Hoses
TASK 29-11-49-400-806-A	Installation of the Hydraulic Suction Hose
TASK 29-11-49-400-807-A	Installation of the Hydraulic Pressure Hose
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Engine Hydraulic Tubes and Hoses ** ON A/C NOT FOR ALL
Engine Hydraulic Tubes and Hoses ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 29-11-49-860-143-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001).
(2) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001).

Subtask 29-11-49-941-113-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Put a WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.

(2) Open access door 197CB.
(a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system on the ground service panel.
(3) On the HYD section of panel 40VU:

Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.

(4) Put a WARNING NOTICE(S) in position on access door 195BB to tell persons not to pressurize the reservoir of the Green hydraulic system.
(5) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 29-11-49-010-133-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR

Subtask 29-11-49-040-081-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser 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 78-30-00-040-805).

Subtask 29-11-49-010-143-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the engine.

4. Procedure
Subtask 29-11-49-210-055-A ** ON A/C NOT FOR ALL

A. General Visual Inspection of the Engine Hydraulic Tubes and Hoses

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

(1) Do not discard a part until you are sure there are no repairs available. If you reject a part and no repair is available, contact United Technologies Aerospace Systems (UTAS) for disposition.
(2) Do a visual inspection of the engine hydraulic tubes and hoses.
(a) Examine the hydraulic suction hose, pressure hose and case drain tubes and hoses. Look for cracks, corrosion, nicks, scratches, chafing, dents and other damage.
(b) Examine the hydraulic suction hose, pressure hose and case drain tubes and hoses. Look for loose connections and leaks.
(c) Examine the hydraulic suction hose, pressure hose and case drain tubes and hoses attaching hardware. Look for loose, worn, damaged or missing hardware.
(3) If you find damage, replace the part or contact United Technologies Aerospace Systems (UTAS) for disposition:

For the hydraulic case drain tubes and hoses (Ref. AMM TASK 29-11-49-000-805) and (Ref. AMM TASK 29-11-49-400-805).
For the hydraulic suction hose (Ref. AMM TASK 29-11-49-000-806) and (Ref. AMM TASK 29-11-49-400-806).
For the hydraulic pressure hose (Ref. AMM TASK 29-11-49-000-807) and (Ref. AMM TASK 29-11-49-400-807).

5. Close-up
Subtask 29-11-49-410-105-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR

Subtask 29-11-49-440-065-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 29-11-49-410-110-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(2) Close access doors 197CB and 195BB.
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 00:18:03 UTC