Remove Grease from the External Surfaces of the Engine [IAE]

TASK 70-11-50-100-010-A
Remove Grease from the External Surfaces of the Engine

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURERS MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS INFORMATION.

1. Reason for the Job
This procedure removes oil, grease, hydraulic fluid and loose soil from the engine exterior surfaces and external parts.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-072)	alkali cleaner
(Material No.V01-300)	alkali cleaner
(Material No.V01-339)	alkali cleaner
(Material No.V01-340)	alkali cleaner
(Material No.V01-421)	alkali cleaner
(Material No.V01-434)	alkaline gel cleaner
(Material No.V01-435)	alkaline gel cleaner
(Material No.V01-468)	alkali cleaner
(Material No.V01-469)	alkali cleaner
(Material No.V01-480)	alkali cleaner
(Material No.V01-483)	alkali cleaner
(Material No.V01-484)	alkaline gel cleaner
(Material No.V01-485)	alkaline gel cleaner
(Material No.V01-488)	alkali cleaner
(Material No.V01-564)	alkali cleaner

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
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

3. Job Set-up
Subtask 70-11-50-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 70-11-50-010-051-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 70-11-50-040-050-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser.

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.

(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 70-11-50-010-050-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

4. Procedure
Subtask 70-11-50-620-050-A ** ON A/C NOT FOR ALL

A. Install covers on all the openings of the engine.
(1) The openings include:
(a) The inlet
(b) The exhaust
(c) All the bleeds
(d) The open fuel lines and oil lines
(e) The breather tubes
(f) The open electrical connectors.

Subtask 70-11-50-110-051-A ** ON A/C NOT FOR ALL

B. Remove the grease from the engine external surfaces.
(1) Use one of the subsequent procedures to apply the cleaner:
(a) Alkali cleaner solution procedure
1 Mix one of the alkali cleaners in the subsequent list with water at the specified concentration, then use a spray, steam or foam to apply the solution on the external surfaces of the engine:

NOTE: The solution will give the best results if the concentration is near or equal to the specified maximum concentration.

a alkali cleaner (Material No.V01-072) at 30% by volume maximum
b alkali cleaner (Material No.V01-300) at 30% by volume maximum
c alkali cleaner (Material No.V01-339) at 25% by volume maximum
d alkali cleaner (Material No.V01-340) at 25% by volume maximum
e alkali cleaner (Material No.V01-421) at 30% by volume maximum
f alkali cleaner (Material No.V01-468) at 20% by volume maximum
g alkali cleaner (Material No.V01-469) at 25% by volume maximum
h alkali cleaner (Material No.V01-480) at 25% by volume maximum
i alkali cleaner (Material No.V01-483) at 20% by volume maximum
j alkali cleaner (Material No.V01-488) at 50% by volume maximum
k alkali cleaner (Material No.V01-564) at 25% by volume maximum.
(b) Alkaline gel cleaner procedure
1 Apply one of the alkaline gels in the subsequent list. Refer to the alkaline gel manufacturer’s instructions for the correct applicator to use, to apply the alkaline gel:

NOTE: It is necessary to use a special applicator to apply the alkaline gel cleaners. Information about the correct applicator is in the alkaline gel manufacturer’s instructions.

NOTE: It is not approved to use a steam cleaner to apply the alkaline gel cleaners.

a alkaline gel cleaner (Material No.V01-434)
b alkaline gel cleaner (Material No.V01-435)
c alkaline gel cleaner (Material No.V01-484)
d alkaline gel cleaner (Material No.V01-485) .
(2) Let the cleaner stay on the engine for between 10 and 20 minutes.

CAUTION: REMOVE THE ALKALI CLEANER COMPLETELY. IF NOT COMPLETELY REMOVED, DAMAGE CAN OCCUR TO THE INLET AND THRUST REVERSER ACOUSTIC SURFACES.

CAUTION: INSURE THE DEBRIS IS CLEAR FROM THE NACELLE DRAIN HOLES.

(3) Flush the engine fully with warm or hot water.

Subtask 70-11-50-630-050-A ** ON A/C NOT FOR ALL

C. Remove all of the covers from the openings on the engine.

5. Close-up
Subtask 70-11-50-410-050-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) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(3) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(4) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 70-11-50-440-050-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 70-11-50-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:53:53 UTC