Depreservation of the Engine [PW11]

TASK 71-00-00-630-802-A
Depreservation of the Engine

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

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

ZONE: 400

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 1M(3 FT)
No specific	1	CONTAINER 20L (5 USGAL)
No specific	1	FLASHLIGHT
No specific	1	SCREWDRIVER - SMALL

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine (synthetic base)
(Material No.P05-005)	wipe, lint-free
(Material No.P15-001)	dehydrating agent (desiccant)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
140	PACKING − PREFORMED	EIPC 79-11-02-01-

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-27-00-910-801-A	SPOP 1 - Degreasing of the Engine Exterior
TASK 70-27-00-910-804-A	SPOP 208 - Degreasing of Parts by Solvent Wiping
TASK 71-00-00-550-805-A	Preservation General Procedure
TASK 71-00-00-720-811-A	Test No. 3A - Idle Power Test
TASK 71-00-00-860-814-A	Shutdown of the Engine
TASK 71-00-00-860-817-A	Motor the Engine (Dry Method)
TASK 71-00-00-860-822-A	Start the Engine (Normal Manual Start)
TASK 71-00-00-860-825-A	Motor the Engine (Wet Method)
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
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 71-13-12-400-802-A	Installation of the Fan Cowl Oil Tank Access door
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
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
TASK 79-21-06-960-801-A	Replace the Oil Filter Element
TASK 80-11-00-600-801-A	Fill the Starter with Oil
Engine (Oil Tank Location)

3. Job Set-up
Subtask 71-00-00-941-144-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832)

Subtask 71-00-00-010-198-A ** ON A/C NOT FOR ALL

B. 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.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 71-00-00-040-110-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Ground 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 ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 71-00-00-010-199-A ** ON A/C NOT FOR ALL

D. 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.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

4. Procedure

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

Subtask 71-00-00-630-053-A ** ON A/C NOT FOR ALL

A. General
(1) This task gives the instructions to put the engine back into service after preservation.
(2) To depreserve an engine that was preserved for more than 60 days, it will be necessary to run the engine.
(3) For general preservation procedures (Ref. AMM TASK 71-00-00-550-805).

Subtask 71-00-00-630-054-A ** ON A/C NOT FOR ALL

B. Depreservation Procedure for Engines that Were Preserved for 60 Days or Less

CAUTION: REMOVE AND INSTALL PROTECTION COVERS AS NECESSARY TO PREVENT DAMAGE TO THE ENGINE AND ADJACENT COMPONENTS.

(1) Make sure that you remove and install protection covers as necessary to prevent damage to the engine.
(2) Remove the 636-3000-11GSE TR C DUCT COVER and the 636-4000-23GSE EXHAUST COVER from the engine intake and exhaust areas.
(3) Remove all the P15-001dehydrating agent (desiccant) and the relative INDICATOR-HUMIDITY from the engine.
(4) Depreserve the Main Gear Box (MGB) as follows:
(a) Examine the MGB for corrosion damage from the hydraulic fluid.
(b) If necessary, repair any hydraulic fluid leaks.
(c) If any gearbox accessories were removed, do the steps that follow:
1 Remove the COVER - PROTECTION from the gearbox drive pads.
2 Install the gearbox accessories.
(5) Install a new main oil filter element (Ref. AMM TASK 79-21-06-960-801).
(a) Do a filter inspection to make sure that the oil filter is installed and that there are no signs of shipping damage.
1 It is not necessary to install a new oil filter if the engine is received new from production or an overhaul facility, or was preserved by method 1 or 2 with the new filter installed.
(6) Fill the engine oil system as follows:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

(a) Open the oil tank cap as follows:
1 Lift the lever on the oil tank cap up and turn it counterclockwise.
2 Lift and remove the oil tank cap.
(b) Put the CONTAINER 20L (5 USGAL) in position below the end of the scupper drain line below the engine.

WARNING: BE CAREFUL WHEN YOU OPEN THE FLAPPER VALVE. OIL CAN SPRAY OUT WHEN THE VALVE IS FIRST OPENED. IF YOU DO NOT OBEY THIS WARNING, HOT OIL CAN BURN YOUR EYES AND SKIN.

CAUTION: BE CAREFUL WHEN YOU USE A SCREWDRIVER TO OPEN THE FLAPPER VALVE. IF YOU DO NOT OBEY THIS CAUTION, DAMAGE TO THE FLAPPER VALVE CAN OCCUR.

(c) Insert the SCREWDRIVER - SMALL through one of the 0.25 in. (6.35 mm) holes in the oil tank inlet screens and open the oil tank flapper valve if necessary.

CAUTION: DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. YOU MUST IMMEDIATELY REMOVE UNWANTED FUEL OR OIL WITH A CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO SOME ENGINE PARTS.

CAUTION: YOU MUST ONLY USE THE ENGINE OILS SPECIFIED IN SERVICE BULLETIN PW1000G-D-79-00-0002-00A-930A-D. IT IS NOT RECOMMENDED TO MIX DIFFERENT BRANDS OF APPROVED OILS, BUT IT IS PERMITTED IN THE LIMITS SPECIFIED IN THE SERVICE BULLETIN. THE USE OF UNAPPROVED TYPES OR BRANDS OF OILS IS NOT PERMITTED AND CAN CAUSE DAMAGE TO THE ENGINE.

(7) Hold the flapper valve open and add the P03-001lubricant, aircraft turbine engine (synthetic base) into the filler neck until you cannot add more without overflow to the scupper drain.

NOTE: You can add approximately 10 USgal (37.85 l).

NOTE: The stable oil level in the sight glass will now be at the "FULL" mark.

NOTE: If the aircraft is not parked level, the oil level indicator in the sight glass is affected and can be above the full mark. This is permitted. The oil system is serviced correctly if no more oil can be added without overflow into the scupper drain.

(8) Install the oil tank cap as follows. See sheet 2 of the figure:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT YOU CLOSE THE OIL TANK CAP COMPLETELY. MAKE SURE THAT THE OIL TANK CAP LEVER IS DOWN AND LOCKED. IF YOU DO NOT, OIL CAN COME OUT OF THE TANK AND AN IN-FLIGHT SHUTDOWN CAN OCCUR.

(a) Use the FLASHLIGHT and make sure that the oil tank flapper valve (in the filler neck) is closed and without damage.
(b) Examine the filler cap 79110201PACKING − PREFORMED140 (1):
1 Replace it if damage is found.
(c) Align the cap with the filler neck and push it down into position.
(d) Turn the lever clockwise and push down to lock.
(e) Make sure that the lever is down against the cap.
(9) Fill the starter with oil (Ref. AMM TASK 80-11-00-600-801).
(10) Record the quantity of oil that you added.

CAUTION: DO NOT DRY MOTOR OR OPERATE THE ENGINE WITHOUT SUFFICIENT OIL. THIS CAN CAUSE DAMAGE TO THE ENGINE.

(11) Dry-motor the engine so that the engine oil pressure is stable (Ref. AMM TASK 71-00-00-860-817).
(12) Stop the engine dry-motoring.
(13) Do a check of the oil level approximately 15 minutes after the engine dry-motoring. See sheet 2 of the figure:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

(14) If necessary, add the P03-001lubricant, aircraft turbine engine (synthetic base) until 13.4 quarts (12.7 liters) is shown on the cockpit oil indicator as follows:
(a) Open the oil tank cap as follows:
1 Lift the lever on the oil tank cap up and turn it counterclockwise.
2 Lift and remove the oil tank cap.
3 If necessary, insert the SCREWDRIVER - SMALL through one of the 0.25 in. (6.35 mm) holes in the oil tank inlet screens and open the oil tank flapper valve.
4 Add the P03-001lubricant, aircraft turbine engine (synthetic base).
5 Use the FLASHLIGHT and make sure that the oil tank flapper valve (in the filler neck) is closed and without damage.
6 Examine the filler cap packing (1):

Replace it if damage is found.

7 Align the cap with the filler neck and push down into position.
8 Turn the lever clockwise and push down to lock.
9 Make sure that the lever is down against the cap.
(15) Record the quantity of oil that you added.
(16) Make sure that the oil tank cap is closed and that the lever is in the down (locked) position.
(17) Dry-motor the engine so that the engine oil pressure is stable (Ref. AMM TASK 71-00-00-860-817).
(18) If the oil level is below 13.4 quarts (12.7 liters) as shown on the cockpit oil indicator, do step 4.B.(14) thru step 4.B.(17) again.
(19) Start the engine and run it at ground idle until it is at operating temperature (Ref. AMM TASK 71-00-00-860-822).
(20) Shut down the engine (Ref. AMM TASK 71-00-00-860-814).
(21) If necessary, continue to step 4.F.(1) to examine the oil level with the sight glass and add oil.
(22) Finish the procedure as in Para 4.G.

Subtask 71-00-00-630-055-A ** ON A/C NOT FOR ALL

C. Depreservation Procedure for the Engines that Were Preserved for More than 60 Days

CAUTION: REMOVE AND INSTALL PROTECTION COVERS AS NECESSARY TO PREVENT DAMAGE TO THE ENGINE AND ADJACENT COMPONENTS.

(1) Make sure that you remove and install the protection covers as necessary to prevent damage to the engine.
(2) Remove the 636-3000-11GSE TR C DUCT COVER and the 636-4000-23GSE EXHAUST COVER from the engine intake and exhaust areas.
(3) Remove all the P15-001dehydrating agent (desiccant) and the relative INDICATOR-HUMIDITY from the engine.
(4) Depreserve the MGB as follows:
(a) Examine the MGB for corrosion damage from the hydraulic fluid.
(b) If necessary, repair any hydraulic fluid leaks.
(c) Install the gearbox accessories.

CAUTION: DO NOT LET HYDRAULIC FLUID STAY ON THE MAIN GEARBOX DURING THE PRESERVATION PERIOD. HYDRAULIC FLUID CAN CAUSE CORROSION AND DAMAGE TO THE GEARBOX HOUSING.

(5) Examine the MGB for hydraulic fluid.
(a) If you see hydraulic fluid on the MGB, clean and remove the hydraulic fluid with the solvent wipe procedure (Ref. AMM TASK 70-27-00-910-801) or (Ref. AMM TASK 70-27-00-910-804).
(6) Install the new main oil filter element (Ref. AMM TASK 79-21-06-960-801).
(a) Do a filter inspection to make sure that the oil filter is installed and that there is no sign of shipping damage.
1 It is not necessary to install a new oil filter if the engine is received new from the production or an overhaul facility, or was preserved by method 1 or 2 with the new filter installed.
(7) Fill the engine oil system as follows:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

(a) Open the oil tank cap as follows:
1 Lift the lever on the oil tank cap up and turn it counterclockwise. See sheet 2 of the figure.

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

2 Lift and remove the oil tank cap.
(b) Put the CONTAINER 20L (5 USGAL) in position below the end of the scupper drain line below the engine.

WARNING: BE CAREFUL WHEN YOU OPEN THE FLAPPER VALVE. OIL CAN SPRAY OUT WHEN THE VALVE IS FIRST OPENED. IF YOU DO NOT OBEY THIS WARNING, HOT OIL CAN BURN YOUR EYES AND SKIN.

CAUTION: BE CAREFUL WHEN YOU USE A SCREWDRIVER TO OPEN THE FLAPPER VALVE. IF YOU DO NOT OBEY THIS CAUTION, DAMAGE TO THE FLAPPER VALVE CAN OCCUR.

(c) Insert the SCREWDRIVER - SMALL through one of the 0.25 in. (6.35 mm) holes in the oil tank inlet screens and open the oil tank flapper valve if necessary.

CAUTION: DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. YOU MUST IMMEDIATELY REMOVE UNWANTED FUEL OR OIL WITH A CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO SOME ENGINE PARTS.

(d) Hold the flapper valve open and add the P03-001lubricant, aircraft turbine engine (synthetic base) into the filler neck until you cannot add more without overflow to the scupper drain.

NOTE: You can add approximately 10 USgal (37.85 l).

NOTE: The stable oil level in the sight glass will now be at the "FULL" mark.

(e) Install the oil tank cap as follows:

1 Use the FLASHLIGHT and make sure that the oil tank flapper valve (in the filler neck) is closed and without damage.
2 Examine the filler cap 79110201PACKING − PREFORMED140 (1):
a Replace it if damage is found.
3 Align the cap with the filler neck and push down into position.
4 Turn the lever clockwise and push down to lock.
5 Make sure that the lever is down against the cap.
(f) Fill the starter with oil (Ref. AMM TASK 80-11-00-600-801).
(g) Record the quantity of oil that you added.
(8) Wet-motor the engine at maximum motor speed until 30 seconds after fuel vapor comes out of the exhaust (Ref. AMM TASK 71-00-00-860-825).
(9) Do a check of the engine oil level and add oil, if necessary, as follows:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

(a) Do a check of the oil level approximately 15 minutes after the engine wet-motoring.
(b) If necessary, add the P03-001lubricant, aircraft turbine engine (synthetic base) until 13.4 quarts (12.7 liters) is shown on the cockpit oil indicator as follows:
1 Open the oil tank cap as follows. See sheet 2 of the figure:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

a Lift the lever on the oil tank cap up and turn it counterclockwise.
b Lift and remove the oil tank cap.
c If necessary, insert the SCREWDRIVER - SMALL through one of the 0.25 in. (6.35 mm) holes in the oil tank inlet screens and open the oil tank flapper valve.
d Add the P03-001lubricant, aircraft turbine engine (synthetic base).
e Use the FLASHLIGHT and make sure that the oil tank flapper valve (in the filler neck) is closed and without damage.
f Examine the filler cap packing (1):

Replace if damage is found.

g Align the cap with the filler neck and push down into position.
h Turn the lever clockwise and push down to lock.
i Make sure that the lever is down against the cap.
(c) Record the quantity of oil that you added.
(d) Make sure that the oil tank cap is closed and that the lever is in the down (locked) position.

CAUTION: DO NOT OPERATE THE STARTER FOR MORE THAN ITS DUTY CYCLE. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE STARTER.

(e) Dry-motor the engine for a minimum of three minutes or until the engine oil pressure is stable, whichever is longer (Ref. AMM TASK 71-00-00-860-817).
(f) Wet-motor the engine at the maximum motor speed until 30 seconds after fuel vapor comes out of the exhaust (Ref. AMM TASK 71-00-00-860-825).
(g) Dry-motor the engine for no less than six minutes (Ref. AMM TASK 71-00-00-860-817).
(h) Stop the engine dry-motoring.
(i) Examine the exhaust nozzle for signs of fuel puddling.
1 If no fuel puddling is seen, go to step 4.C.(9)(j).
2 If fuel puddling is seen, do step 4.C.(9)(b) thru step 4.C.(9)(e), step 4.C.(9)(h) and step 4.C.(9)(j).
(j) Do a check of the oil level approximately 15 minutes after the engine dry-motoring.
(k) If the oil level is below 13.4 quarts (12.7 liters) as shown on the cockpit oil indicator, do steps 4.C.(9)(b) thru step 4.C.(9)(j) again.
(10) Do a normal manual start to burn off the remaining flushing oil in the fuel system (Ref. AMM TASK 71-00-00-860-822).
(a) If the manual start failed, dry-motor the engine for 30 seconds.
1 Wait no less than 15 minutes when the N2 speed is zero RPM, to let the starter decrease in temperature.
2 Wet-motor the engine at maximum motor speed until 30 seconds after fuel vapor comes out of the exhaust (Ref. AMM TASK 71-00-00-860-825).
3 Dry-motor the engine as follows (Ref. AMM TASK 71-00-00-860-817).
a Dry-motor the engine for no less than five minutes, three times, for 15 minutes total.
b Wait no less than two minutes when the N2 speed is zero RPM, between each five minute dry-motoring at maximum motor speed, to let the starter decrease in temperature.
4 Do step 4.C.(10) again.

Subtask 71-00-00-720-085-A ** ON A/C NOT FOR ALL

D. Do the operational test No. 3 (idle power test) (Ref. AMM TASK 71-00-00-720-811).

Subtask 71-00-00-860-237-A ** ON A/C NOT FOR ALL

E. Shutdown the engine (Ref. AMM TASK 71-00-00-860-814).

Subtask 71-00-00-612-056-A ** ON A/C NOT FOR ALL

CAUTION: DO NOT MOTOR THE ENGINE IMMEDIATELY AFTER SHUTDOWN. YOU MUST FIRST DO A CHECK OF THE OIL LEVEL BETWEEN 5 AND 60 MINUTES AFTER THE ENGINE SHUTDOWN. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO ENGINE PARTS CAN OCCUR.

F. Do a Check of the Engine Oil Level and Add Oil, If Necessary

NOTE: It is recommended to do a check of the oil level and fill the engine with oil between five minutes and 60 minutes after engine shutdown. The oil level sight glass is most accurate during this time interval.

(1) Examine the engine oil level with the sight glass and add oil (if necessary):
(a) Find the engine oil tank on the left side of the engine attached to the fan case at approximately the 9 o'clock position:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

(b) Use the FLASHLIGHT and find the engine oil level sight glass on the oil tank.
(c) Wipe the sight glass with P05-005wipe, lint-free.
(d) If the oil level in the sight glass is at or above the "FULL" mark, do not add oil. Continue to step 4.G.(4).
(e) If the oil level in the sight glass is below the "FULL" mark, then do step 4.F.(1)(f) thru step 4.F.(1)(h) to add oil.
(f) Open the oil tank cap as follows. See the sheet 2 of the figure:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

1 Lift the lever on the oil tank cap up and turn counter clockwise.
2 Lift and remove the oil tank cap.
(g) Put the CONTAINER 20L (5 USGAL) below the end of the scupper drain line below the engine.

NOTE: This is to catch any overflow during oil fill.

WARNING: BE CAREFUL WHEN YOU OPEN THE FLAPPER VALVE. OIL CAN SPRAY OUT WHEN THE VALVE IS FIRST OPENED. IF YOU DO NOT OBEY THIS WARNING, HOT OIL CAN BURN YOUR EYES AND SKIN.

CAUTION: BE CAREFUL WHEN YOU USE A SCREWDRIVER TO OPEN THE FLAPPER VALVE. IF YOU DO NOT OBEY THIS CAUTION, DAMAGE TO THE FLAPPER VALVE CAN OCCUR.

(h) Add correct P03-001lubricant, aircraft turbine engine (synthetic base) into the filler neck until you cannot add more without overflow into the scupper drain.

NOTE: The stable oil level in the sight glass will now be in the "FULL" mark range.

NOTE: If only a small quantity of oil was added before oil overflow into the scupper drain, do a check to make sure the flapper valve opened.

NOTE: If the aircraft is not parked level, the oil level indicator in the sight glass is affected and can be above the full mark. This is permitted. Servicing of the oil system is correct if you cannot add more oil without overflow into the scupper drain.

Subtask 71-00-00-869-381-A ** ON A/C NOT FOR ALL

G. Complete the Procedure.
(1) Install the oil tank cap. See the sheet 2 of the figure:

Engine (Oil Tank Location) ** ON A/C NOT FOR ALL

(a) Use the FLASHLIGHT and make sure that the oil tank flapper valve (in the filler neck) is closed and without damage.
(b) Examine the filler cap packing (1):
1 Replace if damage is found.
(c) Align the cap to the filler neck and then push down into position.
(d) Turn the lever clockwise and then push down to lock.
(2) Record the quantity of P03-001lubricant, aircraft turbine engine (synthetic base) you added.
(3) Wipe clean the area with P05-005wipe, lint-free.
(4) Make sure that the oil tank cap is closed and the lever is in the down (locked) position.
(5) Close the oil tank access door on the engine left side cowl door (Ref. AMM TASK 71-13-12-400-802).

5. Close-up
Subtask 71-00-00-410-185-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 cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

Subtask 71-00-00-440-103-A ** ON A/C NOT FOR ALL

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

Subtask 71-00-00-410-186-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.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802).

[Rev.10 from 2021] 2026.04.01 02:31:28 UTC