W DOC AIRBUS | AMM A320F

Preservation of the Engine (for 60 Days or Less) [PW11]

TASK 71-00-00-550-804-A
Preservation of the Engine (for 60 Days or Less)

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
This task gives the engine preservation instructions when the engine is in storage on-wing for 60 days or less.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
1
CONTAINER 20L (5 USGAL)
No specific
2
COVER - BLANKING
No specific
Torque wrench: range to between 70 and 60 lbf.in (0.79 and 0.68 m.daN ) T
636-1100-4GSE
2
INLET COWL LIP COVER
636-3000-11GSE
2
TR C DUCT COVER
636-4000-23GSE
2
EXHAUST COVER
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.P03-001)
lubricant, aircraft turbine engine
(Material No.P06-053)
lubricant, sealing ring
(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
4
PACKING
EIPC 73-11-02-01-280
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 12-32-28-281-001-A
Drain Water Content
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 71-00-00-550-803-A
Preservation of the Engine (for More than 60 Days)
TASK 71-00-00-550-804-A
Preservation of the Engine (for 60 Days or Less)
TASK 71-00-00-550-805-A
Preservation General Procedure
TASK 71-00-00-860-814-A
Shutdown of the Engine
TASK 71-00-00-860-817-A
Motor the Engine (Dry Method)
TASK 71-00-00-860-823-A
Start the Engine (Normal Automatic Start)
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 72-15-00-200-801-A
Borescope Inspection of the Fan Drive Gearbox (FDG) Assembly
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 79-00-00-281-804-A
Sampling of the Engine Oil
TASK 79-00-00-610-801-A
Check and Fill the Engine Oil
TASK 79-00-00-610-802-A
Change the Engine Oil
TASK 79-00-00-680-801-A
Drain the Engine Oil
TASK 79-21-06-960-801-A
Replace the Oil Filter Element
TASK 80-11-00-600-801-A
Fill the Starter with Oil
F Preservation of the Engine (for 60 Days or Less)
3. Job Set-up
Subtask 71-00-00-941-138-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 71-00-00-010-190-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 2M (6 FT) - ADJUSTABLE in position.
Subtask 71-00-00-040-106-A ** ON A/C NOT FOR ALL
C. Deactivation of the Thrust Reverser for 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 maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 71-00-00-010-191-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
Subtask 71-00-00-620-073-A ** ON A/C NOT FOR ALL
A. General
   (1) In the event that the engine is to be stored for more than 60 days (Ref. AMM TASK 71-00-00-550-803).
   (2) In the event that you are not sure of how long time the engine will not be used, use the preservation procedure that is necessary for the longer time.
   (3) Do the general preservation procedure (Ref. AMM TASK 71-00-00-550-805).
Subtask 71-00-00-620-074-A ** ON A/C NOT FOR ALL
B. Preservation of the Engine Oil System
CAUTION: DO THE PRESERVATION OF THE ENGINE VERY CAREFULLY WHEN THERE IS A RISK OF LARGE TEMPERATURE CHANGES, MUCH HUMIDITY OR SALT WATER. IN THESE CONDITIONS, DAMAGE TO ENGINE PARTS CAN OCCUR.
   (1) Change or sample the engine oil:
NOTE: We recommend that you use a limit of 1000 ppm of water by the ASTM D6304 00 procedure to find if a mandatory oil change in method I is not necessary.
     (a) If the engine was operated in the last seven days, it is not necessary to change or sample the engine oil system.
     (b) Sample the engine oil if the engine was not operated in the last seven days by the ASTM D6304-00 procedure. If the results are less than 1000 ppm of water limit, it is not necessary to change the oil. This is for one 60-day period only (Ref. AMM TASK 79-00-00-281-804).
     (c) If you sample the engine oil by the ASTM D6304-00 procedure and the results are more than 1000 ppm of water, it is necessary to change the oil (Ref. AMM TASK 79-00-00-610-802).
     (d) Drain the engine oil (Ref. AMM TASK 79-00-00-680-801).
     (e) Install a new main oil filter element and fill the oil system with oil (Ref. AMM TASK 79-21-06-960-801).
     (f) Fill the starter with oil (Ref. AMM TASK 80-11-00-600-801).
   (2) Dry-motor the engine:
CAUTION: DO NOT OPERATE THE STARTER FOR MORE THAN ITS MAXIMUM TIME LIMIT OF 5 MINUTES. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE STARTER.
     (a) Dry-motor the engine and make sure that the engine oil pressure is stable (Ref. AMM TASK 71-00-00-860-817). Continue to dry-motor the engine for five minutes. This will flow the oil through the engine.
NOTE: The fan blades must turn during the dry motoring procedure. This is necessary to get the oil to all the engine oil systems.
   (3) Drain the oil from the oil system. Drain the oil from the oil tank, main gearbox, LP02, LB02, LR02 and the starter (Ref. AMM TASK 79-00-00-680-801):
     (a) It is not necessary to install a new oil filter if the engine will be sent for a shop visit or the oil was changed in step 4.B.(1)(c) or 4.B.(1)(e).
     (b) Make sure that the oil filter is installed before shipment or storage.
Subtask 71-00-00-620-075-A ** ON A/C NOT FOR ALL
C. Preservation of the Main Gearbox
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.
   (1) Examine the main gearbox for hydraulic fluid.
   (2) If you see hydraulic fluid on the main gearbox, clean and remove the hydraulic fluid by solvent wipe procedure (Ref. AMM TASK 70-27-00-910-801) or (Ref. AMM TASK 70-27-00-910-804).
   (3) If any gearbox accessories have been removed, do the steps that follow.
     (a) Apply P03-001lubricant, aircraft turbine engine on the gearbox drive pad.
     (b) Install a COVER - BLANKING on the gearbox drive pad.
Subtask 71-00-00-620-082-A ** ON A/C NOT FOR ALL
D. Preserve the engine for relative humidity as follows:
   (1) Put 26 lb (11.8 kg) to 52 lb (23.6 kg) of P15-001dehydrating agent (desiccant) in the engine. Put half in the inlet and half in the tailpipe areas. Hang the P15-001dehydrating agent (desiccant) in all the areas and make sure that the agent does not touch the engine parts.
   (2) Put the relative humidity indicators in the inlet and exhaust areas.
   (3) Seal the engine for storage as follows:
     (a) Install the 636-1100-4GSE INLET COWL LIP COVER over the engine intake area.
     (b) Install the 636-3000-11GSE TR C DUCT COVER and 636-4000-23GSE EXHAUST COVER over the engine exhaust area.
     (c) The protective covers must have windows so that you can see the relative humidity indicators in the engine.
   (4) Make a record for each engine as follows:
     (a) Record the method of the preservation.
     (b) Record the date of the preservation.
     (c) Record that the oil system is drained.
   (5) Examine the humidity indicator, installed on the engine at step 4.D.(2), to make sure it is safe at the times shown (24 hours, 7 days and then at regular 15-day cycles).
     (a) If the relative humidity is less than 40 percent, continue the inspection cycle.
NOTE: The relative humidity must be at 40 percent or less in the engine during this time.
     (b) If the relative humidity is between 40 percent and 60 percent for two inspections, one after the other, replace the P15-001dehydrating agent (desiccant) and continue the inspection cycle.
     (c) If the relative humidity is more than 60 percent for two inspections, one after the other, examine the storage bag for damage and replace the P15-001dehydrating agent (desiccant).
     (d) For the 15-day cycle:
   (6) If the preservation limits are more than specified, complete the inspections that follow before you start the engine:
CAUTION: BEFORE A BORESCOPE INSPECTION, MAKE SURE THAT:
  • THE ENGINE METAL TEMPERATURE IS NOT LESS THAN THE OUTSIDE AIR TEMPERATURE, AND
  • THE OUTSIDE AIR RELATIVE HUMIDITY IS NOT HIGHER THAN 60 PERCENT. THIS IS TO PROTECT THE COMPONENTS FROM CONDENSATION AND AMBIENT AIR WHICH CAN CAUSE DAMAGE TO THEM.
     (a) Do a borescope inspection of the fan-drive gearbox system gears for corrosion (Ref. AMM TASK 72-15-00-200-801).
Subtask 71-00-00-620-077-A ** ON A/C NOT FOR ALL
E. Complementary Storage Instructions
   (1) If the engine stays in storage for more than the 60-day limit, perform either option 1 or option 2:
     (a) Option 1: Do the preservation of the engine (for more than 60 days) (Ref. AMM TASK 71-00-00-550-803).
     (b) Option 2: Operate the engine as necessary. Use the instructions that follow:
NOTE: You can do the preservation of the engine (for 60 days or less) procedure a maximum of two times in a 120-day period (option 2). If the engine is to stay in storage longer than 120 days, you must do the preservation of the engine (for more than 60 days) (method II) procedure (option 1).
       1 Remove the COVER - BLANKING, 636-1100-4GSE INLET COWL LIP COVER, 636-4000-23GSE EXHAUST COVER and 636-3000-11GSE TR C DUCT COVER from the engine and the gearbox drive pads.
       2 Install any of the components that were removed from the gearbox. See the applicable section of the maintenance manual.
       3 Fill the oil system (Ref. AMM TASK 79-00-00-610-801):
         a Make sure that the oil filter is installed.
         b It is not necessary to install a new oil filter if there is an oil filter installed.
         c Fill the starter with the P03-001lubricant, aircraft turbine engine (Ref. AMM TASK 80-11-00-600-801).
       4 Dry-motor the engine and make sure that the engine oil pressure is stable (Ref. AMM TASK 71-00-00-860-817).
NOTE: The fan blades must turn during the dry-motoring procedure. This is necessary to get the oil to all the engine oil systems.
       5 Make sure that there is no water in the fuel, refer to Active Standard ASTM D4176 (Procedure 1), Visual Inspection Method. The fuel must be clear and bright by visual inspection standards:
NOTE: Pratt and Whitney recommends that you take two samples, one from the wing tank and one from the fuel filter drain plug on the fuel manifold. It is necessary to drain approximately 0.264 USgal (1.00 l) of fuel for this sample testing.
         a Take a fuel sample from the wing tank (Ref. AMM TASK 12-32-28-281-001).
CAUTION: DO NOT PRY ON THE RETENTION TAB TO REMOVE THE DRAIN PLUG. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE DRAIN PLUG CAN OCCUR.
         b Take a fuel sample from the fuel filter drain plug on the fuel manifold as follows:
F Preservation of the Engine (for 60 Days or Less) ** ON A/C NOT FOR ALL
  • Put the CONTAINER 20L (5 USGAL) under the fuel drain port on the fuel manifold.
  • Remove the drain plug (3) as follows:
  • Loosen the drain plug retention bolt (2) on the fuel manifold.
  • Turn the drain plug (3) to disengage the retention tab from under the retention bolt (2).
  • Hold the drain plug (3) by the square, turn and pull it as necessary to remove it from the fuel manifold.
  • Remove and discard the packing (4).
         c Collect the fuel sample.
CAUTION: DO NOT PUSH ON THE RETENTION TAB TO INSTALL THE DRAIN PLUG. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE DRAIN PLUG CAN OCCUR.
         d Install the drain plug (3) as follows:
       6 If the fuel sample is not "clear and bright", do the steps that follow:
         a If the engine is on-wing and the fuel sample from the wing tank drain is not "clear and bright", take corrective action to remove water from the wing tank (Ref. AMM TASK 12-32-28-281-001) and continue to drain and sample the fuel until it is "clear and bright" by visual inspection standards.
         b If the fuel sample from the fuel pump or the wing tank drain is not "clear and bright", operate the engine and get a new sample as follows:
  • Start the engine (Ref. AMM TASK 71-00-00-860-823).
  • Operate the engine at minimum idle for five minutes.
  • Do the engine shutdown (Ref. AMM TASK 71-00-00-860-814).
  • Repeat steps from step 4.E.(1)(b)5_b_ to 4.E.(1)(b)5_d_.
  • Make sure that there is no water in the fuel. Refer to Active Standard ASTM D4176 (Procedure 1), Visual Inspection Method. The fuel must be clear and bright by visual inspection standards.
  • Continue to operate the engine and get the new fuel samples until the fuel is "clear and bright" by visual inspection standards. Repeat step 4.E.(1)(b)6_ as necessary.
       7 You can do the preservation of the fuel system as specified in (Ref. AMM TASK 71-00-00-550-803) as an alternate option.
       8 Drain the oil system (Ref. AMM TASK 79-00-00-680-801):
         a It is not necessary to install a new oil filter.
         b Make sure that the oil filter is installed before shipment or storage.
       9 Preserve the main gearbox as follows:
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.
         a Examine the main gearbox for hydraulic fluid.
         b If you see hydraulic fluid on the main gearbox, clean and remove the hydraulic fluid by the solvent wipe procedure (Ref. AMM TASK 70-27-00-910-801) or (Ref. AMM TASK 70-27-00-910-804).
         c If any of the gearbox accessories are removed, do the steps that follow:
  • Spray P03-001lubricant, aircraft turbine engine on the gearbox drive pad.
  • Install the COVER - BLANKING on the gearbox pad.
       10 Preserve the engine for relative humidity as follows:
         a Put 26 lb (11.8 kg) to 52 lb (23.6 kg) of P15-001dehydrating agent (desiccant) in the engine. Put half in the inlet and half in the tailpipe areas. Hang the P15-001dehydrating agent (desiccant) in all the areas and make sure that the agent does not touch the engine parts.
         b Put the relative humidity indicators in the inlet and exhaust areas.
NOTE: The relative humidity must be at 40 per cent or less inside the engine during the preservation time.
         c Seal the engine for storage as follows:
  • Install the 636-1100-4GSE INLET COWL LIP COVER over the engine intake area.
  • Install the 636-3000-11GSE TR C DUCT COVER and the 636-4000-23GSE EXHAUST COVER over the engine exhaust area.
  • Make sure that the protective covers have windows and that you can see the relative humidity indicators inside the engine.
         d Make a record for each engine as follows:
  • Record the method of the preservation.
  • Record the date of the preservation.
  • Record that the oil system is drained.
         e Examine the humidity indicators, installed on the engine in step 4.E.(1)(b)10_b_, to make sure that it is safe at the times shown (24 hours, 7 days and then at regular 15-day cycles):
  • If the relative humidity is less than 40 per cent, continue the inspection cycle.
NOTE: The relative humidity must be at 40 per cent or less in the engine during this time.
  • If the relative humidity is between 40 and 60 per cent for the two consecutive inspections, replace the P15-001dehydrating agent (desiccant) and continue the inspection cycle.
  • If the relative humidity is more than 60 per cent for the two consecutive inspections, examine the storage bag for damage and replace the P15-001dehydrating agent (desiccant).
  • For the 15-day cycle:
    - If the relative humidity is more than 60 per cent, do the preservation of the engine again by Method I (Ref. AMM TASK 71-00-00-550-804) for 60 days or less, or Method II (Ref. AMM TASK 71-00-00-550-803) for 60 days or more, which depends on the predicted storage time.
CAUTION: BEFORE A BORESCOPE INSPECTION, MAKE SURE THAT:
  • THE ENGINE METAL TEMPERATURE IS NOT LESS THAN THE OUTSIDE AIR TEMPERATURE, AND
  • THE OUTSIDE AIR RELATIVE HUMIDITY IS NOT HIGHER THAN 60 PERCENT. THIS IS TO PROTECT THE COMPONENTS FROM CONDENSATION AND AMBIENT AIR WHICH CAN CAUSE DAMAGE TO THEM.
         f If the preservation limits are more than specified, complete the inspections that follow before you start the engine:
   (2) Examine the assembly for foreign objects, damage and correct assembly.
5. Close-up
Subtask 71-00-00-860-224-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
   (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 71-00-00-440-112-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 71-00-00-410-206-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 WARNING NOTICE(S).
   (3) Remove the access platform(s).
[Rev.10 from 2021] 2026.04.01 12:57:03 UTC
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