General Visual Inspection of Hot Section (EWIS)

TASK 05-24-50-200-002-A
General Visual Inspection of Hot Section (EWIS)

ZONE: 453
ZONE: 454
ZONE: 463
ZONE: 464

1. Reason for the Job
Refer to the MPD TASK: ZL-453-01
GENERAL VISUAL INSPECTION OF HOT SECTION (EWIS)

NOTE: This task can contribute to fuel savings.

NOTE: This is an EWIS (Electrical Wiring Interconnection System) procedure. EWIS is defined in ESPM 20-33-11.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
453	HOT SECTION
454	HOT SECTION
463	HOT SECTION
464	HOT SECTION
437AL, 438AR, 447AL, 448AR, 451AL, 452AR, 461AL, 462AR
452DR, 462DR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 72-53-00-290-802-A	Borescope Inspection of the Stage 1 Low-Pressure Turbine Nozzle Outer Air Duct Condition
TASK 72-53-00-290-802-B	Borescope Inspection of the Stage 1 Low-Pressure Turbine Nozzle Outer Air Duct Condition
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-040-040-A	Deactivation of the Thrust Reverser System
TASK 78-30-00-040-040-B	Deactivation of the Thrust Reverser System
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-30-00-440-040-A	Reactivation of Thrust Reverser
TASK 78-30-00-440-040-B	Reactivation of Thrust Reverser
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Access Doors of the Left Nacelle (Left Side) ** ON A/C NOT FOR ALL
Access Doors of the Left Nacelle (Right Side) ** ON A/C NOT FOR ALL
Access Doors of the Right Nacelle (Left Side) ** ON A/C NOT FOR ALL
Access Doors of the Right Nacelle (Right Side) ** ON A/C NOT FOR ALL
Access Doors of the Left Nacelle (Left Side) ** ON A/C NOT FOR ALL
Access Doors of the Left Nacelle (Right Side) ** ON A/C NOT FOR ALL
Access Doors of the Right Nacelle (Left Side) ** ON A/C NOT FOR ALL
Access Doors of the Right Nacelle (Right Side) ** ON A/C NOT FOR ALL
Hot Section
HPT Case Flange Location ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 05-24-50-010-051-B ** ON A/C NOT FOR ALL

A. Get Access

WARNING: DO NOT EXTEND THE SLATS AND FLAPS WHEN THE THRUST REVERSER COWLS ARE DEPLOYED IN THE 45 DEG. POSITION.

(1) Put the ACCESS PLATFORM 2M (6 FT) in position at zones 453 and 463.

Access Doors of the Left Nacelle (Left Side) ** ON A/C NOT FOR ALL

Access Doors of the Left Nacelle (Right Side) ** ON A/C NOT FOR ALL

Access Doors of the Right Nacelle (Left Side) ** ON A/C NOT FOR ALL

Access Doors of the Right Nacelle (Right Side) ** ON A/C NOT FOR ALL

(2) Open fan cowl doors 437AL, 438AR, 447AL and 448AR (Ref. AMM TASK 71-13-00-010-040).

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(3) Do the deactivation of the thrust reverser system (Ref. AMM TASK 78-30-00-040-040).
(4) Open thrust reverser doors 451AL, 452AR, 461AL and 462AR (Ref. AMM TASK 78-36-00-010-040).

Subtask 05-24-50-010-051-C ** ON A/C NOT FOR ALL

A. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position at zones 453 and 463.

Access Doors of the Left Nacelle (Left Side) ** ON A/C NOT FOR ALL

Access Doors of the Left Nacelle (Right Side) ** ON A/C NOT FOR ALL

Access Doors of the Right Nacelle (Left Side) ** ON A/C NOT FOR ALL

Access Doors of the Right Nacelle (Right Side) ** ON A/C NOT FOR ALL

(2) Open fan cowl doors 437AL, 438AR, 447AL and 448AR (Ref. AMM TASK 71-13-00-010-010).

(3) Do the deactivation of the thrust reverser system (Ref. AMM TASK 78-30-00-040-012).
(4) Open thrust-reverser pressure-relief doors 452DR and 462DR (Ref. AMM TASK 78-32-00-010-010).
(5) Open thrust reverser halves 451AL, 452AR, 461AL and 462AR (Ref. AMM TASK 78-32-00-010-010).

4. Procedure
Subtask 05-24-50-210-051-B ** ON A/C NOT FOR ALL

A. Inspection
(1) Do a general visual inspection of the hot section.
(2) Make sure that there are no signs of corrosion, cracks or damage.
(3) Make sure that all the installations (wiring, ducting, piping) are attached correctly.
(4) Fuel wetness at the rear diffuser-case flange/front High-Pressure-Turbine (HPT) case flange interface at location M, is permitted provided no continuous steady drip leakage is seen.

HPT Case Flange Location ** ON A/C NOT FOR ALL

Subtask 05-24-50-210-051-D ** ON A/C NOT FOR ALL

A. Inspection
(1) Do a general visual inspection of the hot section.
Make sure that:

There is no damage (corrosion, leaks or cracks) on all the parts of the components and the structure that you can see
All the installations (wiring, ducting, piping) are correctly attached.

(2) Do an inspection of the outer air ducts if the parts that follow are broken or disconnected (Ref. AMM TASK 72-53-00-290-802):

The air cooling tubes of the engine Low Pressure Turbine (LPT) and/or
The tubes of the engine High Pressure Turbine Clearance Control (HPTCC).

5. Close-up
Subtask 05-24-50-410-051-B ** 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) Close thrust reverser doors 451AL, 452AR, 461AL and 462AR (Ref. AMM TASK 78-36-00-410-040).
(3) Do the reactivation of the thrust reverser system (Ref. AMM TASK 78-30-00-440-040).
(4) Close fan cowl doors 437AL, 438AR, 447AL and 448AR (Ref. AMM TASK 71-13-00-410-040).
(5) Remove the access platform(s).
(6) Remove all the fixtures, tools, test and support equipment used during this procedure.

Subtask 05-24-50-410-051-C ** 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) Close thrust reverser halves 451AL, 452AR, 461AL and 462AR (Ref. AMM TASK 78-32-00-410-010).
(3) Close thrust-reverser pressure-relief doors 452DR and 462DR (Ref. AMM TASK 78-32-00-410-010).
(4) Do the reactivation of the thrust reverser system (Ref. AMM TASK 78-30-00-440-012).
(5) Close fan cowl doors 437AL, 438AR, 447AL and 448AR (Ref. AMM TASK 71-13-00-410-010).
(6) Remove the access platform(s).
(7) Remove all the fixtures, tools, test and support equipment used during this procedure.

[Rev.10 from 2021] 2026.03.31 22:49:58 UTC