The Differential Pressure Indicator (DPI) of the IDG2 Oil Filter is Extended - Alternate Procedure

TASK 24-21-00-810-816-A
The Differential Pressure Indicator (DPI) of the IDG2 Oil Filter is Extended - Alternate Procedure

1. Possible Causes

IDG [4000XU]
IDG-ENG 2 [4000XU2]
oil filter(s)
oil filters

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-21-00-210-044	Inspection of the Filter Element(s)
AMM 24-21-00-210-805	Check of the Oil Level and Oil-Filter Differential-Pressure Indicator (DPI)
AMM 24-21-00-612-043	Servicing of the IDG after Oil Chemical Contamination
AMM 24-21-00-612-804	Servicing of the IDG after Oil Chemical Contamination
AMM 24-21-00-920-040	Drain IDG Oil System, Discard Filter Element(s) and Replenish
AMM 24-21-00-920-802	Drain, Remove and Discard the Scavenge and Charge Filter Elements and Replenish IDG Oil System
AMM 24-21-51-000-040	Removal of the Integrated Drive Generator - IDG 1(2)
AMM 24-21-51-000-803	Removal of the Integrated Drive Generator - IDG 1(2)
AMM 24-21-51-400-040	Installation of the Integrated Drive Generator - IDG 1(2)
AMM 24-21-51-400-803	Installation of the Integrated Drive Generator - IDG 1(2)
TSM TASK 24-21-00-03	INTEGRATED DRIVE GENERATOR SYSTEM (IDG, GCU) - TASK SUPPORTING DATA

3. Fault Confirmation
Subtask 24-21-00-710-073-A

A. Test
Not applicable.

4. Fault Isolation
Subtask 24-21-00-810-066-A ** ON A/C NOT FOR ALL

A. Do this trouble shooting procedure

NOTE: You can find the DPI extended with CFDS fault messages.
First, do the trouble shooting for each CFDS fault messages.
For this, refer to the CFDS index list.

(1) If no message is found:

replace the IDG [4000XU] AMM 24-21-51-000-040 and AMM 24-21-51-400-040,
or do the alternate procedure (IDG DPI reset).

Subtask 24-21-00-810-067-A ** ON A/C NOT FOR ALL

B. Alternate Procedure (IDG DPI Reset)

NOTE: The alternate procedure lets you do a reset of a DPI as an alternative to the replacement of the IDG.
There are conditions related to this procedure:

A maximum of three resets is permitted.
After a DPI reset, the DPI check interval becomes:
. For normal operations: seven days or 100 FH (the one that comes first).
. For Extended Range Twin-Engined Aircraft Operations (ETOPS): before each flight.
If, after a DPI reset, the DPI does not extend again between two scheduled oil/filter changes, you can cancel the conditions related to this procedure:
The DPI reset status goes back to zero (a maximum of three more resets is permitted).
The DPI check interval goes back to the interval specified in the MPD.
24-21-00-03 TSM TASK 24-21-00-03

(1) If this is the first reset:
(a) Do a check of the IDG2 oil filter(s) and the cover(s) for metal particles AMM 24-21-00-210-044:
1 If you find metal particles:

Do the servicing of the IDG after oil chemical contamination and extension of the oil-filter Differential-Pressure Indication (DPI) AMM 24-21-00-612-043.

2 If you do not find metal particles:
a Drain the oil, replace the oil filter(s) and fill the IDG2 with oil AMM 24-21-00-920-040.
b Do a reset the DPI.
c Use a sticker, tag or other method to write on the IDG that you did the first reset of the DPI.
(2) If this is not the first reset:
(a) Do a check of the number of reset:

if you did three resets:
. replace the IDG [4000XU] AMM 24-21-51-000-040 and AMM 24-21-51-400-040.
if you did less than three resets done:
. do a check of the IDG2 oil filter(s) and the cover(s) for metal particles AMM 24-21-00-210-044.

1 If you find metal particles:

Do the servicing of the IDG after oil chemical contamination and extension of the oil-filter Differential-Pressure Indication (DPI) AMM 24-21-00-612-043.

2 If you do not find metal particles:
a Drain the oil, replace the oil filter(s) and fill the IDG2 with oil AMM 24-21-00-920-040.
b Do a reset of the DPI.
c Use a sticker, tag or other method to write on the IDG that you did the second or third reset of the DPI.

Subtask 24-21-00-810-066-D ** ON A/C NOT FOR ALL

C. Do this trouble shooting procedure

NOTE: You can find the DPI extended with CFDS fault messages.
First, do the trouble shooting for each CFDS fault messages.
For this, refer to the CFDS index list.

(1) If no message is found:

Replace IDG-ENG 2 [4000XU2] AMM 24-21-51-000-803 and AMM 24-21-51-400-803,
Or do the alternate procedure (IDG DPI reset).

Subtask 24-21-00-810-067-D ** ON A/C NOT FOR ALL

D. Alternate Procedure (IDG DPI Reset)

NOTE: The alternate procedure lets you do a reset of a DPI as an alternative to the replacement of the IDG.
There are conditions related to this procedure:

A maximum of three resets is permitted.
After a DPI reset, the DPI check interval becomes:
. For normal operations: seven days or 100 FH (the one that comes first).
. For Extended Range Twin-Engined Aircraft Operations (ETOPS): before each flight.
If, after a DPI reset, the DPI does not extend again between two scheduled oil/filter changes, you can cancel the conditions related to this procedure:
The DPI reset status goes back to zero (a maximum of three more resets is permitted).
The DPI check interval goes back to the interval specified in the MPD.
24-21-00-03 TSM TASK 24-21-00-03

(1) If this is the first reset:
(a) Do a check of the IDG2 oil filters and the covers for metal particles AMM 24-21-00-210-805:
1 If you find metal particles:

Do the servicing of the IDG after oil chemical contamination and extension of the oil-filter Differential-Pressure Indication (DPI) AMM 24-21-00-612-804.

2 If you do not find metal particles:
a Drain the oil, replace the oil filters and fill the IDG2 with oil AMM 24-21-00-920-802.
b Do a reset of the DPI.
c Use a sticker, tag or other method to write on the IDG that you did the first reset of the DPI.
(2) If this is not the first reset:
(a) Do a check of the number of reset:

If you did three resets:
. Replace IDG-ENG 2 [4000XU2] AMM 24-21-51-000-803 and AMM 24-21-51-400-803.
If you did less than three resets:
. Do a check of the IDG2 oil filters and its covers for metal particles AMM 24-21-00-210-805.

1 If you find metal particles:

Do the servicing of the IDG after oil chemical contamination and extension of the oil-filter Differential-Pressure Indication (DPI) AMM 24-21-00-612-804.

[Rev.8 from Aug 2018] 2026.04.04 04:39:01 UTC