Removal of the IDG Fuel/Oil and Oil/Oil Heat-Exchangers for Cleaning in Workshop

TASK 24-21-42-100-802-A
Removal of the IDG Fuel/Oil and Oil/Oil Heat-Exchangers for Cleaning in Workshop

ZONE: 437
ZONE: 447

1. Reason for the Job
Refer to the MPD TASK: 242100-21
REMOVE IDG COOLER FOR IN-SHOP CLEANING AND FUEL-OIL COOLER THERMAL VALVE REPLACEMENT.

2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
437	FAN COWL
447	FAN COWL

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-21-42-000-802-A	Removal of the IDG Fuel/Oil Heat-Exchanger
TASK 24-21-42-000-803-A	Removal of the IDG Oil/Oil Heat-Exchanger
TASK 24-21-42-400-802-A	Installation of the IDG Fuel/Oil Heat-Exchanger
TASK 24-21-42-400-803-A	Installation of the IDG Oil/Oil Heat-Exchanger

3. Job Set-up
Subtask 24-21-42-020-069-A ** ON A/C NOT FOR ALL

A. Removal of the IDG Fuel/Oil Heat-Exchanger
(1) Remove the IDG fuel/oil heat-exchanger (Ref. AMM TASK 24-21-42-000-802).

Subtask 24-21-42-020-070-A ** ON A/C NOT FOR ALL

B. Removal of the IDG Oil/Oil Heat-Exchanger
(1) Remove of the IDG oil/oil heat-exchanger (Ref. AMM TASK 24-21-42-000-803).

4. Procedure
Subtask 24-21-42-110-054-A ** ON A/C NOT FOR ALL

A. Cleaning of the IDG Fuel/Oil Heat-Exchanger
(1) Send the IDG fuel/oil heat-exchanger to the workshop.
(2) Clean the IDG fuel/oil heat-exchanger.
(3) Replace the thermal valve of the IDG fuel/oil heat-exchanger.

Subtask 24-21-42-110-055-A ** ON A/C NOT FOR ALL

B. Cleaning of the IDG Oil/Oil Heat-Exchanger
(1) Send the IDG oil/oil heat-exchanger to the workshop.
(2) Clean the IDG oil/oil heat-exchanger.

5. Close-up
Subtask 24-21-42-420-077-A ** ON A/C NOT FOR ALL

A. Installation of the IDG Fuel/Oil Heat-Exchanger
(1) Install the IDG fuel/oil heat-exchanger (Ref. AMM TASK 24-21-42-400-802).

Subtask 24-21-42-420-078-A ** ON A/C NOT FOR ALL

B. Installation of the IDG Oil/Oil Heat-Exchanger
(1) Install the IDG oil/oil heat-exchanger (Ref. AMM TASK 24-21-42-400-803).

[Rev.10 from 2021] 2026.03.31 23:21:00 UTC